Ositech comm Network Card Trumpcard Data Fax Modem User Manual
Trumpcard Data/Fax Modem  
User’s Guide and Reference  
 
Preface  
This guide provides installation and operating instructions for the Ositech  
Trumpcard 33600 or 28800 Data/Fax Modem PC Card.  
The Trumpcard Modem is a PCMCIA Type II Modem with no external  
controls or indicators. To operate the Modem, you require a  
communications software package.  
‘PCMCIA Card’ and ‘PC Card’ are used interchangeably throughout this  
manual. Both terms refer to the Ositech Trumpcard Data/Fax Modem PC  
Card.  
iii  
 
FCC Notice  
This equipment has been tested and found to comply with the limits for a  
Class B digital device, pursuant to Part 15 of the FCC Rules. These limits  
are designed to provide reasonable protection against harmful  
interference in a residential installation. This equipment generates, uses  
and can radiate radio frequency energy and, if not installed and used in  
accordance with the instructions, may cause harmful interference to radio  
communications. However, there is no guarantee that interference will not  
occur in a particular installation. If this equipment does cause harmful  
interference to radio or television reception, which can be determined by  
turning the equipment off and on, the user is encouraged to try to correct  
the interference by one or more of the following measures:  
•
•
•
Reorient or relocate the receiving antenna.  
Increase the separation between the equipment and the receiver.  
Connect the equipment into an outlet on a circuit different from  
that to which the receiver is connected.  
•
Consult the dealer or an experienced radio or television technician  
for help.  
Modifications  
The FCC requires the user be notified that any changes or modifications  
made to this device that are not expressly approved by Ositech  
Communications Inc. may void the user’s authority to operate this  
equipment.  
Operating Conditions  
This device complies with Part 15 of the FCC Rules. Operation is subject  
to the following two conditions:  
•
•
This device may not cause harmful interference, and  
This device must accept any interference received, including  
interference that may cause undesired operation.  
Canadian Electromagnetic Compatibility Advisory  
This Class B digital apparatus meets all requirements of the Canadian  
Interference Causing Equipment Regulations.  
Conseil sur la compatibilité des Electromagnétiques,  
pour le Canada  
Cet appareil numérique de la classe B respecte toutes les exigences du  
Règlement sur le matériel brouilleur du Canada.  
iv  
 
U.S. Regulations Governing the Use of Modems  
This equipment complies with Part 68 of the FCC rules. Located on the  
Modem is a label that contains, among other information, the FCC  
Registration Number and Ringer Equivalent Number (REN) for this  
equipment. Upon request, you must provide this information to your  
telephone company.  
The REN is useful to determine the quantity of devices you may connect to  
your telephone line and still have all of those devices ring when your  
telephone number is called. In most, but not all, areas the sum of the  
RENs of all devices connected to one line should not exceed five (5.0). To  
be certain of the number of devices you may connect to your telephone  
line, as determined by the REN, you should contact your local telephone  
company to determine the maximum REN for your calling area. The REN  
for this device is 0.7B.  
If your telephone equipment causes harm to the telephone network, the  
telephone company may discontinue your service temporarily. If possible,  
they will notify you in advance. But, if advance notice is not practical, you  
will be notified as soon as possible. You will also be informed of your right  
to file a complaint with the FCC.  
Your telephone company may make changes in its facilities, equipment,  
operations, or procedures that could affect the proper functioning of your  
equipment. If they do, you will be notified in advance to give you an  
opportunity to maintain uninterrupted telephone service.  
If you experience trouble with this telephone equipment, contact your local  
telephone company for information on obtaining service or repairs. The  
telephone company may ask that you disconnect this equipment from the  
network until the problem has been corrected or until you are sure that the  
equipment is not malfunctioning.  
This equipment may not be used on coin service provided by the  
telephone company. Connection to party lines is subject to state  
tariffs.Canadian Regulations Governing the Use of Modems  
Canadian Regulations Governing the Use of Modems  
Note:  
The Canadian Department of Communications label identifies certified  
equipment. This certification means that the equipment meets certain  
telecommunications network protective, operational, and safety  
requirements. The Department does not guarantee the equipment will  
operate to the user’s satisfaction.  
v
 
Before installing the equipment, ensure that it is permissible to be  
connected to the facilities of the local telecommunications company. The  
equipment must also be installed using an acceptable method of  
connection. In some cases, the company’s inside wiring associated with a  
single line individual service may be extended by means of a certified  
connector assembly (telephone extension cord). Be aware that the above  
conditions may not prevent degradation of service in some situations.  
Repairs to certified equipment should be made by an authorized  
Canadian maintenance facility, designated by the supplier. Any repairs or  
alterations made by the user to this equipment, or equipment  
malfunctions, may give the telecommunications company cause to  
request that the equipment be disconnected.  
Make sure, for their own protection, that the electrical ground connections  
of the power utility, telephone lines and internal metallic water pipe  
system, if present, are connected together. This precaution may be  
particularly important in rural areas.  
Caution:  
Users should not attempt to make such connections themselves,  
but should contact the appropriate electric inspection authority, or  
electrician, as appropriate.  
The Load Number (LN) assigned to each terminal device denotes the  
percentage of the total load to be connected to a terminal loop which is  
used by the device, to prevent overloading. The termination on a loop may  
consist of any combination of devices, subject only to the requirement that  
the total of the Load Numbers of all devices does not exceed 100. An  
alphabetic suffix is also specified in the Load Number for the appropriate  
ringing type (A or B), if applicable. For example, LN=20 A designates a  
Load Number of 20 and an “A” type ringer.  
The Load Number for this device is 6.  
For information on the location of the authorized Canadian maintenance  
facility nearest you, contact:  
Ositech Communications Inc.  
679 Southgate Drive  
Guelph, Ontario, Canada  
N1G 4S2  
Telephone (519) 836-8063  
Facsimile (519) 836-6156  
vi  
 
This product contains inactivated SPECTRUM CONNECTED  
cellular  
data communication technology, which requires a use license from  
Spectrum Information Technologies, Inc. No such license is provided with  
this product and activation without a use license is prohibited.  
This product contains SPECTRUM CONNECTED  
cellular data  
communication technology, which can be activated for data  
communication over a cellular network when a license is obtained from  
SPECTRUM, and the product is combined with an appropriate cellular  
telephone driver and corresponding cable compatible with popular  
brands of cellular telephones. To obtain a license and to determine the  
availability of an appropriate driver and cable for a cellular telephone,  
contact Ositech Communications, Inc.  
vii  
 
Contents  
Section One  
Introduction  
1-1  
Features................................................................................................................ 1-2  
Data Mode......................................................................................................... 1-2  
Facsimile Mode ................................................................................................. 1-3  
Cellular Mode .................................................................................................... 1-3  
Unique Features ............................................................................................... 1-4  
Industry Standards ............................................................................................... 1-5  
Section Two  
Hardware Installation  
2-1  
Preparing for Installation ...................................................................................... 2-1  
Installing the Trumpcard Modem .................................................................... 2-2  
Connecting to the Telephone Network with a Direct Cable Connection ........... 2-3  
Connection to the Telephone Network through the Line Interface Module ....... 2-4  
Section Three  
Basic Operation  
3-1  
Before You Begin ................................................................................................. 3-2  
Enabling The Trumpcard ................................................................................. 3-2  
Operating the Trumpcard .................................................................................... 3-3  
Using AT Commands ...................................................................................... 3-3  
Making an Outgoing Call .................................................................................. 3-4  
Re-Dialling the Last Number ........................................................................... 3-5  
Storing a Number ............................................................................................. 3-5  
Connection Messages ..................................................................................... 3-5  
Ending Your Connection .................................................................................. 3-7  
Setting Up for a Non-Error Correcting Connection ......................................... 3-7  
Receiving an Incoming Call ............................................................................. 3-8  
Setting up for a Cellular Connection ............................................................... 3-8  
ModemConfigurationsforCellularOperation................................................... 3-9  
viii  
 
Section Four  
Modem Command Reference  
4-1  
Modem Command Guidelines .............................................................................. 4-2  
Modem Command Summary ............................................................................... 4-4  
Modem Command Descriptions ........................................................................... 4-6  
Modem S Registers ...........................................................................................4-34  
Default Register Settings ............................................................................... 4-34  
Modem Register Summary ............................................................................... 4-35  
Register Descriptions ....................................................................................... 4-37  
Facsimile Commands....................................................................................... 4-45  
Class 1 Commands....................................................................................... 4-45  
Class 2 Commands....................................................................................... 4-45  
Section Five  
Modem Test Procedures  
5-1  
Local Modem Self-Test ........................................................................................ 5-2  
Local Analog Loopback ........................................................................................ 5-3  
Local Analog Loopback with Self-Generated Pattern ......................................... 5-4  
Remote Digital Loopback ..................................................................................... 5-5  
Remote Digital Loopback with Self-Generated Pattern....................................... 5-6  
Local Digital Loopback ......................................................................................... 5-7  
Testing Modem Memory ....................................................................................... 5-8  
ix  
 
x
 
Introduction  
Section One  
Introduction  
Congratulations on your choice of an Ositech Trumpcard Data/Fax  
Modem! We believe you will find it a superior quality product that will  
meet or exceed your facsimile and data communication needs.  
The Trumpcard Modem can be used with most standard  
communications and facsimile packages. Refer to the communications  
package documentation for instructions to set up and configure your  
communications software to take advantage of the Trumpcard  
Modem’s features.  
This section lists the features of the Trumpcard Modem, briefly  
describes a number of industry standards, and provides basic  
instructions for getting started with your Trumpcard Modem.  
•
•
•
•
Features  
Industry Standards  
Before You Begin Dialling  
Communicating With the Trumpcard Modem  
User’s Guide and Reference  
1 - 1  
 
Section One  
Features  
Data Mode  
The Trumpcard Modem fully supports the following industry and ITU-T  
(formerly CCITT) standards.  
•
V.FC, ITU-T: V.34 33.6+28.8, V.32bis, V.32, V.22bis, V.22, V.23,  
V.21, and Bell 103/212A operation  
•
Data rate adaptation to 230400, 115200, 57600, 38400, 28800,  
26400, 24000, 21600, 19200, 14400, 12000, 9600, 7200, 4800, 2400,  
1200, and 300 bps  
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Enhanced “AT” compatible command set  
ITU-T V.42 LAPM error correction protocol  
MNP 2, 3, and 4 error correction protocol  
MNP 10 Error correction protocol for cellular communications  
ITU-T V.42bis data compression  
MNP Class 5 data compression  
Adaptive packet assembly  
Automatic feature negotiation  
V.42 and MNP negotiation  
Automatic speed adjust  
Full or half duplex transmission  
Automatic dial, re-dial, and answer  
Pulse or tone dialling  
Call progress detection  
Line quality receive level monitoring  
Diagnostics  
Compatible with off-the-shelf communications/facsimile packages  
Synchronous communications using Hayes AutoSync  
1 - 2  
Trumpcard 14400/28800 Modem  
 
Introduction  
Facsimile Mode  
The Trumpcard facsimile supports Class 1 and Class 2 AT fax  
commands for facsimile communications. To use the facsimile, you  
must have a facsimile communications software package.  
•
Group 3 facsimile send/receive speeds of 14400, 9600, 7200, 4800,  
and 2400 bps  
•
•
•
ITU-T V.17, V.29, and V.27ter  
Facsimile Class 1 command set compatible with EIA/TIA 578  
Facsimile Class 2 command set compatible with proposed EIA/TIA  
592  
Cellular Mode  
The Trumpcard Modem has an optional cellular kit that allows the  
Modem to connect to a variety of cellular phones. For an up-to-date list  
of the cellular phones currently supported please contact Ositech.  
Cellular phones supported:  
•
•
•
•
AT&T  
3610, 3710, 3730, 3760  
DT-20x, DT-22x  
DIAMOND TEL  
MITSUBISHI  
MOTOROLA  
3500, 4000, 4500, 5000, D100  
Micro Digital Lite, MicroTAC Ultralite,  
MicroTAC Lite, MicroTAC Alpha  
•
•
NEC  
OKI  
P110, P120, P180, P200, P201, P300, P301  
900, 910, 1145, 1150  
User’s Guide and Reference  
1 - 3  
 
Section One  
Unique Features  
The Trumpcard Data/Fax Modem has a number of unique features,  
designed to integrate with today’s portable and laptop technology, and  
computer user’s needs.  
•
•
•
•
•
Power conservation modes (including sleep mode)  
Automatic wake-up on incoming call  
16550 Compatible COM Port  
Field upgradeable firmware  
Available as a stand-alone or as a multi-function PCMCIA Type II  
PC Card  
•
Automatic adaptation for Landline or Cellular operation  
1 - 4  
Trumpcard 14400/28800 Modem  
 
Introduction  
Industry Standards  
V.21  
V.21 refers to a standard set by ITU-T for 300 bps Modem  
communications. North American manufactured modems usually follow  
the Bell 103 standard.  
V.22  
V.22 refers to the standard set by ITU-T for 1200 bps Modem  
communications. The V.22 standard is compatible with the Bell 212A  
standard used in North America.  
V.22bis  
V.22bis refers to the standards set by ITU-T for 2400 bps Modem  
communications.  
V.23  
V.23 refers to the standards set by ITU-T for 1200 bps Modem  
communications with a 75 bps back channel. V.23 is primarily used in  
the U.K.  
V.32  
V.32 refers to the standard set by ITU-T for 9600 and 4800 bps Modem  
communications.  
V.32bis  
V.32bis refers to the standard set by ITU-T for 14,400, 12,000, 9600,  
7200, and 4800 bps Modem communications.  
V.34  
V.34 refers to the standard set by ITU-T for 28,800 to 2400 bps Modem  
communications.  
User’s Guide and Reference  
1 - 5  
 
Section One  
V.42  
V.42 refers to the standard set by ITU-T for error control protocol. The  
V.42 standard also supports the MNP error correction protocol standard.  
V.42bis  
V.42bis refers to the standard set by ITU-T for data compression. Data  
compression can only be used in conjunction with error correction.  
MNP 2, 3, and 4  
MNP 2, 3, and 4 refers to an alternate standard for error correction  
protocol.  
MNP 10  
MNP 10 refers to a error correction protocol often used in harsh  
environments (cellular use)  
MNP 5  
MNP 5 refers to an alternate standard for data compression.  
V.17  
V.17 refers to the standards set by ITU-T for 14400, 12000, 9600 and  
7200 bps facsimile communications  
V.29  
V.29 refers to the standards set by ITU-T for 9600 and 7200 bps facsimile  
communications.  
V.27ter  
V.27ter refers to the standards set by ITU-T for 4800 and 2400 bps  
facsimile communications.  
V.FC  
V.FC refers to Rockwell’s proprietary Modem communications standard  
for 28800, 26400, 24000, 21600, 19200, 16800, and 14400 bps  
communications.  
1 - 6  
Trumpcard 14400/28800 Modem  
 
Hardware Installation  
Section Two  
Hardware Installation  
Follow the instructions to unpack and install the Trumpcard Modem on  
your computer.  
Preparing for Installation  
To install the Trumpcard Modem, you require the accompanying  
diskettes and the following items:  
• A computer equipped with a PCMCIA Release 2.x, Type II PC  
Card slot.  
• PCMCIA Card and Socket Services Version 2.x or higher,  
installed. This is optional since the Trumpcard can be operated  
without Card and Socket Services.  
User’s Guide and Reference  
2 - 1  
 
Section Two  
Installing the Trumpcard Modem  
The Trumpcard Modem can be inserted into a computer whether the power  
is ON or OFF.  
Follow these steps:  
•
Orient the Trumpcard Modem so that the 68-pin connector is next to  
the PCMCIA slot of the computer.  
•
Insert the Trumpcard Modem into the slot until it is firmly seated.  
Note:  
Note:  
These are general installation instructions that apply to most  
computers. Please refer to the manual accompanying your computer  
for any additional instructions on installing PCMCIA PC Card adapters.  
The Trumpcard Modem is keyed to go in one way only. If you feel  
resistance before the it is fully inserted, remove it, turn it over, and re-  
insert it.  
Installing the Trumpcard  
2 - 2  
Trumpcard 14400/28800 Modem  
 
Hardware Installation  
Connecting to the Telephone Network with  
a Direct Cable Connection  
The Trumpcard Modem may be directly connected to either a standard  
land based telephone line or to a cellular telephone using the cellular  
option kit. For cellular installation, refer to the installation instructions  
accompanying the cellular option kit.  
To directly connect the Trumpcard to a standard land based  
telephone line follow these steps:  
• Locate the modular cable that has a male RJ-12 connector at one  
end and a PCMCIA Modem Adapter connector at the other.  
• For a multi-function Trumpcard, the Modem connection is identified  
on the back of the PC Card; insert the PCMCIA Modem adapter  
connector into the one marked Modem.  
• Connect the male RJ-12 connector into the telephone line outlet. If  
you wish to have both a telephone and the Trumpcard Modem  
connected to a single telephone line outlet, then a telephone  
Y-connector is required.  
Note:  
The PCMCIA Modem Adapter connector is keyed to go in one way  
only. If you feel resistance before the connector is fully inserted,  
remove the connector, turn it over, and re-insert it.  
Direct Cable Connection to Telephone Network  
User’s Guide and Reference  
2 - 3  
 
Section Two  
Connecting to a Telephone Network  
through the Line Interface Module  
The Trumpcard Modem may be connected to a variety of telephone  
networks using the Line Interface Module, and the appropriate Adapter  
Cable. Contact Ositech for the latest list of countries supported.  
To connect the Trumpcard Modem to your telephone service using the  
Line Interface Module, follow these steps:  
• Locate the Line Interface Module that has a PCMCIA Modem  
Adapter at one end.  
• For a multi-function Trumpcard, the Modem connection is identified  
on the back of the PC Card; insert the PCMCIA Modem Adapter  
connector into the one marked Modem.  
• Connect the Trumpcard Modem to your telephone service  
connection via the Line Interface Module, using the interconnecting  
cable and adapter approved for use in your country.  
Note:  
The PCMCIA Modem Adapter connector is keyed to go in one way  
only. If you feel resistance before the connector is fully inserted,  
remove the connector, turn it over, and re-insert it.  
Line Interface Module Connection to Telephone Network  
2 - 4  
Trumpcard 14400/28800 Modem  
 
Basic Modem Operation  
Section Three  
Basic Modem Operation  
This section provides basic instructions for getting started with  
your Modem.  
•
•
•
•
•
•
•
•
•
•
•
Before You Begin  
Operating the Trumpcard Modem  
Using AT Commands  
Making an Outgoing Call  
Re-Dialling the Last Number  
Storing a Number  
Connection Messages  
Ending Your Connection  
Setting up for a Non-Error Correcting Connection  
Receiving an Incoming Call  
Setting up for a cellular connection  
User’s Guide and Reference  
4 - 1  
 
Section Four  
BeforeYou Begin  
Before you begin using the Modem, you should configure your  
communications software to work with the Trumpcard. For specific  
configuration instructions, refer to the documentation that came with  
your communications software.  
You will likely require the following information:  
•
•
Communications Port: The Trumpcard is compatible with  
either Com1, COM2, COM3 or COM4, and is dependant on the  
enabling software.  
Modem Type: Your communications software may have drivers for  
specific manufacturers of modems. If the Trumpcard is not listed,  
choose a driver for a Generic AT compatible Modem, or refer to  
the diskettes provided for Modem script files.  
Before you start to dial out, you may want to take a moment to find out  
the maximum speed of the remote Modem, and whether it supports  
error correction or not. Knowing this may help you later if you have  
communications problems.  
Enabling The Trumpcard  
The Trumpcard Modem, whether singular or part of a multi-function PC  
Card, has been configured such that it will be recognized and enabled  
as a Modem when used with a computer running Card and Socket  
Services, with a Generic Enabler. The Modem will be fully functional,  
and its configuration will be determined by the settings set for the  
Generic Enabler. In this mode of operation any other functions provided  
by the Trumpcard will not be operational. Refer to the Installation Guide  
accompanying a multi-function Trumpcard for more details on how to  
operate all functions.  
For operating systems that do not support PCMCIA equipped  
computers, the Trumpcard Modem can still be used by making use of  
the many Trumpcard enablers provided by Ositech. For a multi-function  
Trumpcard, refer to the Installation Guide accompanying the PC Card  
for details on which operating systems are supported. For a Trumpcard  
Modem only product, refer to the diskettes provided with the  
Trumpcard.  
4 - 2  
Trumpcard 14400/28800 Modem  
 
Basic Modem Operation  
Operating the Trumpcard  
Using AT Commands  
In order to communicate with the Modem, the Modem must be in  
command mode. In addition, you must have your communications  
software operating and communicating interactively with the Modem. The  
Trumpcard will automatically be in command mode after you turn on your  
computer.  
Any commands you issue to the Trumpcard must be prefixed with AT (or  
at). The only exception to the “AT” prefix rules are the re-execute (A/)  
command and the escape code (initially +++).  
It is not necessary that commands be entered after the “AT” sequence, but  
you must send a carriage return [RETURN] or [ENTER] key at the end of  
the command line.  
The Trumpcard automatically senses the speed and data format of your  
communications package provided it is set to one of the following formats:  
•
Speed: 110, 300, 600, 1200, 2400, 4800, 7200, 9600,  
19200, 38400, 57600 or 115200  
•
Data Format  
Data Bits  
Parity  
even or odd  
none  
Stop Bits  
1 or 2  
2
7
7
7
8
mark or space  
even or odd or none  
1 or 2  
1 or 2  
A command line may contain a single command or a series of commands.  
You can separate multiple commands with spaces for readability if you  
like. The “AT” prefix is only required once at the beginning of the  
command line. The command line may contain up to 41 characters. You  
can edit the command line using the backspace key and entering the new  
command. (You will not be able to edit the “AT” prefix once you enter it. If  
you begin to enter a command and change your mind, use the backspace  
key to remove the command up to the “AT” prefix and press [ENTER]).  
User’s Guide and Reference  
4 - 3  
 
Section Four  
Making an Outgoing Call  
To make an outgoing call manually, enter:  
ATD 234 3456 [ENTER]  
Where 234 3456 is the telephone number of the remote Modem. Spaces  
on the command line are ignored by the Modem.  
There are a number of options that you can add to the dial command.  
Some of the more common are listed here. Refer to the ATD command for  
more information.  
Tone or Pulse Dialling  
To force either tone (touch tone) or pulse (rotary) dialling, include a T (for  
tone) or P (for pulse) after the ATD command but before the telephone  
number. You can set the default mode using the ATT or ATP command.  
For example, to set the default to tone dialling, enter:  
ATDT 234 3456 [ENTER]  
Wait for Dial Tone  
This command instructs the Modem to wait for a given period (usually 30  
seconds) to detect dial tone before dialling the telephone number. To wait  
for dial tone, enter a W just before the telephone number. You can also  
instruct the Modem to wait for a second dial tone by inserting the W in the  
sequence of numbers. For example:  
ATDT9W 234 3456 [ENTER]  
Dial Delay  
With some telephone systems, you may need to insert a brief pause  
between digits in the telephone number. (The most common example is  
when you need to dial 9 for an outside line, wait a moment, then continue  
your dialling.) To do this, insert a comma in the telephone number where  
the delay should occur. For example:  
ATDT 9,234 3456 [ENTER]  
The default delay is two seconds but can be adjusted with the S8 register.  
Note:  
The above two examples accomplish similar results through different  
commands; “ATDT9W” dials 9 and then waits for a dial tone before  
continuing, where “ATDT 9,” dials 9, waits a couple seconds and then  
dials whether there’s a tone or not.  
4 - 4  
Trumpcard 14400/28800 Modem  
 
Basic Modem Operation  
Re-Dialling the Last Number  
To re-dial the last number you called, enter:  
ATDL [ENTER]  
Storing a Number  
If there are some numbers that you call regularly, you may want to store  
them so that you do not have to enter the whole number every time you  
call. You can store up to four numbers (in locations 0-3). Each number can  
be up to 36 characters long.  
To store the number 1-999-555-1212 in storage location 3, enter:  
AT&Z3=19995551212[ENTER]  
Dialling a Stored Number  
To dial 1-999-555-1212 (that you stored as number 3), enter:  
ATDS=3 [ENTER]  
Connection Messages  
Once you connect to the remote Modem, your Modem will respond with  
one of the following messages. (If the remote Modem responds with  
garbled characters or seems to have locked up, refer to Setting Up For a  
Non-Error Correcting Connection before you try again.)  
The Modem may respond with a short form (numeric code) or a long form  
(prompt). Refer to the ATXn command description in Section Three to  
control how the Modem responds.  
Short  
Long  
Description  
Form  
Form  
0
1
2
OK  
CONNECT  
RING  
command successful  
connection at 300 bps  
incoming call  
3
4
NO CARRIER  
ERROR  
no carrier detected  
invalid command  
5
6
7
8
9
10  
11  
CONNECT 1200  
NO DIAL TONE  
BUSY  
NO ANSWER  
CONNECT 0600  
CONNECT 2400  
CONNECT 4800  
connection at 1200 bps  
no dial tone detected  
remote Modem line is busy  
remote Modem did not answer call  
connection at 600 bps  
connection at 2400 bps  
connection at 4800 bps  
User’s Guide and Reference  
4 - 5  
 
Section Four  
Short  
Long  
Description  
Form  
12  
13  
14  
15  
16  
17  
18  
19  
Form  
CONNECT 9600  
CONNECT 7200  
CONNECT 12000  
CONNECT 14400  
CONNECT 19200  
CONNECT 38400  
CONNECT 57600  
CONNECT 115200  
connection at 9600 bps  
connection at 7200 bps  
connection at 12000 bps  
connection at 14400 bps  
connection at 19200 bps  
connection at 38400 bps  
connection at 57600 bps  
connection at 115200 bps *  
22  
CONNECT 75TX/1200RX originated a connection with  
Modem supporting V.23  
23  
CONNECT 1200TX/75RX answered a connection with  
Modem supporting V.23  
33  
35  
40  
44  
FAX  
DATA  
CARRIER 300  
CARRIER 1200/75  
fax mode connection  
data mode connection  
carrier signal detected at 300 bps  
V.23 backward channel carrier  
detected  
45  
CARRIER 75/1200  
V.23 forward channel carrier  
detected  
46  
47  
48  
49  
50  
CARRIER 1200  
CARRIER 2400  
CARRIER 4800  
CARRIER 7200  
CARRIER 9600  
carrier signal detected at 1200 bps  
carrier signal detected at 2400 bps  
carrier signal detected at 4800 bps  
carrier signal detected at 7200 bps  
carrier signal detected at 9600  
bps  
51  
52  
53  
54  
55  
56  
57  
58  
59  
61  
CARRIER 12000  
CARRIER 14400  
CARRIER 16800  
CARRIER 19200  
CARRIER 21600  
CARRIER 24000  
CARRIER 26400  
CARRIER 28800  
CARRIER 16800  
CONNECT 21600  
carrier signal detected at 12000  
bps  
carrier signal detected at 14400  
bps  
carrier signal detected at 16800  
bps *  
carrier signal detected at 19200  
bps *  
carrier signal detected at 21600  
bps *  
carrier signal detected at 24000  
bps *  
carrier signal detected at 264000  
bps *  
carrier signal detected at 28800  
bps *  
carrier signal detected at 16800  
bps *  
connection at 21600 bps *  
* Only applicable to Trumpcard 28800 version  
4 - 6  
Trumpcard 14400/28800 Modem  
 
Basic Modem Operation  
Description  
Short  
Form  
62  
63  
64  
Long  
Form  
CONNECT 24000  
CONNECT 26400  
CONNECT 28800  
connection at 24000 bps *  
connection at 26400 bps *  
connection at 28800 bps *  
66  
COMPRESSION CLASS 5 MNP data compression  
67  
COMPRESSION V.42BIS V.42bis data compression  
69  
76  
COMPRESSION NONE  
PROTOCOL NONE  
no compression  
connection with Modem that does  
not support MNP or V.42  
connection with Modem that  
supports V.42  
connection with Modem that  
supports MNP  
77  
80  
81  
PROTOCOL: LAP-M  
PROTOCOL: ALT  
PROTOCOL: ALT - CELLULAR  
connection with Modem that  
supports MNP-10  
*Only applicable to Trumpcard 28800 version  
Ending Your Connection  
To end your connection, log off the remote system (if applicable), enter the  
escape sequence (+++), and issue the ATH command.  
You may want to wait 30 seconds or so after your last transmission before  
disconnecting to ensure any data in the Modem buffer has cleared.  
Setting Up for a Non-Error Correcting  
Connection  
The Trumpcard Modem supports the V.42 and MNP error correction  
protocol as its default mode. When you initiate a connection from your  
Trumpcard Modem to a remote Modem not supporting error correction,  
the remote system may respond with garbled characters or even lock up.  
If the remote Modem does not support error correction, the Trumpcard  
continues the connection without error correction or data compression.  
However, as mentioned, the remote system may have already locked up.  
In these cases, you must break the connection, turn off error correction on  
the Trumpcard, and place your call again.  
To turn off error correction for the Trumpcard, use the AT&Q6 command. If  
you wish to make this (non-error correcting) the default setting, follow the  
AT&Q6 command with the AT&W command.  
User’s Guide and Reference  
4 - 7  
 
Section Four  
Receiving an Incoming Call  
Your communications software may be able to accept incoming calls  
automatically or semiautomatically. Refer to your communications  
software documentation for information.  
If your communications software can not automatically accept incoming  
calls, start your communications software and follow these instructions to  
receive a call.  
You can set your Trumpcard Modem to auto-answer incoming calls using  
the S0 register. The S0 register contains the number of rings before  
answering and can be any number from 0 to 255 (Zero rings means do  
not answer).  
If the Modem is not set to auto-answer and an incoming call arrives, the  
Modem will respond with a RING prompt. To answer the call, enter:  
ATA [ENTER]  
This tells the Modem to respond with a carrier signal. Once the connection  
is established, the Modem will prompt with CONNECT.  
Setting up for a Cellular Connection  
The Trumpcard Modem with the cellular option supports direct connection  
to cellular phones, eliminating the need for other intelligent interfaces.  
In order to set up the Trumpcard Modem to recognize and control the  
cellular phone you are using, software provided with the optional cellular  
kit must be uploaded to the Modem. Once the software is uploaded, the  
cellular operation is transparent to any communications software you may  
be using.  
4 - 8  
Trumpcard 14400/28800 Modem  
 
Basic Modem Operation  
Modem Configurations for Cellular Operation  
The Trumpcard’s performance will be improved by modifying the standard  
(factory default) configuration. For reliable communications, it is also  
recommended that the Modem to which you are connecting also be  
MNP10 compatible. Using a MNP10 link will allow negotiation of the  
Modem link speeds based on current line conditions.  
For a MNP10 to MNP10 link negotiation at 1200 bps the Trumpcard  
initialization string would be:  
AT&F&C1&D2S95=44)M1*H1:E0  
The other Modem, if a landline based Modem, can be initialized with:  
AT&F&C1&D2S95=44  
In this configuration the modems will first establish a MNP10 link at 1200  
bps. They will then make a step up to 4800 bps and then step up to a final  
speed based on the line conditions. The total connect time for this method  
can be up to 60 seconds.  
For a MNP10 to MNP10 link negotiation at 4800 bps (quick connect) the  
Trumpcard initialization string would be:  
AT&F&C1&D2S95=44)M1*H2:E0.  
The other Modem if a landline based Modem can be initialized with  
AT&F&C1&D2S95=44)M1@M18  
In this configuration the modems will first establish a MNP10 link at 4800  
bps and then step up to a final speed based on the line conditions. The  
total connect time for this method can be up to 40 seconds.  
For connecting to modems that do not support MNP10 the Trumpcard  
initialization string would be  
AT&F&C1&D2S95=44:E0%E2  
which will result in the Trumpcard trying to establish the best possible link  
speed. If it is found that connections cannot be reliably made, then it may  
be necessary to force the Trumpcard connection to 4800 bps using the  
initialization string  
AT&F&C1&D2S95=44:E0%E2F6.  
Note:  
Refer to the [n command for details on how to combine cellular and  
land based initialization strings.  
User’s Guide and Reference  
4 - 9  
 
Section Four  
Cellular Phone Configuration  
The placement of the cellular phone and antenna is critical to the success  
of the communications session. The antenna placement should be  
adjusted until the maximum signal strength is observed on the cellular  
phone signal indicator. Under some circumstances a special high gain  
antenna may improve performance.  
Additional information regarding the use of the cellular phone and cellular  
network should be obtained from the service provider or cellular phone  
manufacturer.  
Outgoing Cellular Call  
From a communications software standpoint, making an outgoing call  
using cellular or a landline differs only in the initialization string. Once the  
cellular driver has been uploaded the Modem will dynamically switch  
between cellular operation and landline operation.  
Whenever the Modem is instructed to make an outgoing call (i.e ATD  
command), it will determine if it is possible to make a cellular call; if it’s  
not, it will revert to a landline based call. As the user, it is up to you to  
ensure that cellular conditions (cellular cable is connected, cellular phone  
is powered on, etc) are ready for operation prior to instructing the Modem  
to make an outgoing call.  
The initialization string sent to the Trumpcard for cellular connections may  
not result in the optimum connection when used for landline connections.  
If possible, set the communications software to send the desired  
initialization string based on the type of connection being used.  
Refer to the section Making an Outgoing Call for details on how to  
command the Modem to make outgoing calls  
Incoming Cellular Call  
The Trumpcard is capable of receiving incoming cellular Modem calls.  
From a communications software standpoint, receiving an incoming call  
using a cellular or a landline link differs only in the initialization string.  
Once the cellular driver has been uploaded, the Modem will dynamically  
switch between cellular operation and landline operation.  
Whenever a cellular phone connection exists between the Trumpcard and  
the cellular phone, only incoming calls from the cellular phone will be  
detected. If a cellular phone connection does not exist it will revert to  
monitoring for landline based incoming calls.  
As the user, it is up to you to ensure that the cellular environment (cellular  
cable is connected, cellular phone is powered on, etc) is ready for  
operation prior to accepting incoming cellular Modem calls.  
4 - 10  
Trumpcard 14400/28800 Modem  
 
Basic Modem Operation  
The initialization string sent to the Trumpcard for cellular connections may  
not result in the optimum connection when used for landline connections.  
If possible, set the communications software to send the desired  
initialization string based on the type of connection being used.  
Refer to the section Receiving an Incoming Call for details on how to  
command the Modem to receive incoming calls.  
Cellular Call Status  
The Trumpcard provides a method of determining if the cable connection  
to the cellular phone is operational. The AT^T6 command is used for this  
purpose and returns a decimal number representing the current status.  
The bit map for the status byte is:  
Bit #  
Description  
0
1
2
3
4
5
6
7
Cellular phone is receiving an incoming call  
Cellular phone is in use  
Cellular phone is locked  
There is no service for cellular phone  
Cellular phone is powered on  
Cellular driver is initialized  
–
Cellular cable detected  
The bit map values have to be converted from binary to decimal. The most  
common values are:  
160 Cellular cable is detected and driver is initialized.  
176 Cellular cable detected, driver is initialized and phone is  
powered on. (This state is required to place a call.)  
178 Cellular cable detected, driver is initialized, phone is powered  
on and cellular phone in use.  
User’s Guide and Reference  
4 - 11  
 
Section Four  
4 - 12  
Trumpcard 14400/28800 Modem  
 
Modem Command Reference  
Section Four  
Modem Command Reference  
This section of the manual describes the AT commands that the  
Trumpcard modem supports. This information includes command  
parameters, defaults, result codes, and often examples.  
These commands cannot be entered (and sent) to the modem from the  
operating system command line. You must use a communications  
software package to talk to the modem. Your communications software  
may handle all of the communications with the modem for you — you may  
never have to issue an AT command yourself. Refer to your  
communications software documentation for more information.  
Also included in this section is a list of the S registers and their functions.  
At the end of the section is a list of the facsimile commands supported by  
the Trumpcard data/fax modem. These commands appear for reference  
only — you cannot operate the facsimile manually.  
•
•
•
•
•
•
•
•
Modem Command Guidelines  
Modem Command Summary  
Modem Command Descriptions  
Modem S Registers  
Default Register Settings  
Modem Register Summary  
Register Descriptions  
Facsimile Commands  
User’s Guide and Reference  
4 - 1  
 
Section Four  
Modem Command Guidelines  
Each of the following modem command descriptions has a list of  
possible parameters with their default values. The modem loads the  
default values at initialization (when you turn the power on or you issue  
the ATZ command). If you exclude a mandatory parameter, the modem  
assumes a zero value. Invalid commands or parameters return the  
ERROR message.  
The command line may contain a single command or a series of  
commands. You can separate commands with a space for readability,  
but, the command line can not exceed 41 characters. The modem  
performs the command after you send a terminating character. The  
default terminator is carriage return (ASCII 013), but you can change this  
by writing to register S3.  
You can edit the command line using the backspace character (ASCII  
008); change this by writing to register S5. However, the backspace can  
not be 0, greater than 127, or the terminating character.  
All command lines begin with AT (in capital or lower case letters). A  
command line can be terminated at any time by issuing CTRL-X (ASCII  
018). The modem will ignore the command line and return an OK  
message. You can use A/ to repeat the last command line. The A/ does  
not require a terminating character.  
An escape code sequence (+++) returns the modem to the command  
mode from the data mode. There must be a time delay between the last  
character transmitted and the first character of the escape code. You can  
change the delay by writing to register S12; (default 1 second). The  
escape code character must occur three times in succession for an  
escape.  
Parameters that are entered for the AT and the AT& commands are  
limited in value to 0-255, where the parameter is "MOD"ed with 256. The  
result must be within the specified range; if it is not, the modem returns  
an ERROR message.  
Parameters entered for an S register are also "MOD"ed with 256.  
Parameters that are out of range are stored in the S register, however, no  
ERROR message is reported. Functionally the lower or higher register  
limit is used.  
4 - 2  
Trumpcard 14400/28800 Modem  
 
Modem Command Reference  
If you enter a parameter for the AT\ or AT% commands that is out of range,  
the upper limit is stored and no ERROR message is reported.  
Following the modem command description assume OK and ERROR as  
valid responses for almost all of the commands. Other valid responses  
for a command, if any, are discussed with the command descriptions.  
User’s Guide and Reference  
4 - 3  
 
Section Four  
Modem Command Summary  
Command Title  
Default  
none  
none  
1 *  
A/  
Re-execute Command  
Answer  
A
Bn  
Dn  
En  
Fn  
Set ITU-T or Bell Mode  
Dial  
T
Command Echo  
1 *  
Select Line Modulation (14400)  
Select Line Modulation (28800)  
Switch-Hook Control  
Identification  
none  
none  
none  
none  
2 *  
+MS  
Hn  
In  
Ln  
Speaker Volume  
Mn  
Nn  
On  
P
Speaker Control  
1 *  
Automode Detection  
Return To The On-Line State  
Set Pulse Dial As Default  
Result Code Display  
Reading/Writing S Registers  
Set Tone Dial As Default  
Result Code Form (Message Control)  
Connect Message Control  
Extended Result Codes  
Control Long Space Disconnect  
Reset  
1 *  
none  
none  
0 *  
none  
none  
1 *  
0 *  
4 *  
0 *  
none  
0 *  
0 *  
none  
0 *  
0 *  
3 *  
0 *  
*
Qn  
Sn  
T
*
Vn  
Wn  
Xn  
Yn  
Zn  
&Cn  
&Dn  
&F  
&Gn  
&Jn  
&Kn  
&Ln  
DCD Option  
DTR Option  
Restore Factory Configuration  
Set Guard Tone  
Telephone Jack Selection  
DTE/Modem Flow Control  
Line Type  
* Indicates command is saved in Non-Volatile Memory  
4 - 4  
Trumpcard 14400/28800 Modem  
 
Modem Command Reference  
Command Title  
Default  
(&Qn) *  
0 *  
&Mn  
&Pn  
&Qn  
&Rn  
&Sn  
&Tn  
&V  
Communication Mode  
Dial Pulse Ratio  
Communication Mode  
RTS/CTS Option  
DSR Option  
5 *  
0 *  
0 *  
Test And Diagnostic  
4 *  
View Configuration and User Profiles  
Store User Profile  
none  
none  
0 *  
none  
3
&Wn  
&Yn  
&Zn=x  
\Bn  
Designate Default User Profile  
Store Phone Number  
Transmit Break  
\Gn  
Modem-to-Modem Flow Control  
Break Control  
0
\Kn  
5
\Nn  
Operation Mode Control  
Compression Control  
none  
1 *  
0
*
%Cn  
%En  
%L  
Disable/Enable Line Quality Monitor  
Report Received Signal Level  
Report Line Signal Quality  
MNP Extended Services  
Link Negotiated Speed  
Transmit Level Adjust for Cellular  
Connection  
none  
none  
1
%Q  
-Kn  
*Hn  
)Mn  
0 *  
0
:En  
@Mn  
[n  
Compromise Equalizer  
Initial Cellular Power Level  
Event Based Command  
1
0
None  
* Indicates command is saved in Non-Volatile Memory  
User’s Guide and Reference  
4 - 5  
 
Section Four  
Modem Command Descriptions  
A/ — Re-execute  
Parameters  
Default  
none  
none  
Re-executes the most recent AT command string. The principle  
application of this command is to place another call (e.g., Dial command)  
that failed, to connect due to a busy line, no answer, or a wrong number.  
This command must appear alone on a command line and must be  
terminated by the "/" character. (An [ENTER] should not be entered to  
terminate the command.)  
A — Answer  
Parameters  
Default  
none  
none  
This must be the last command entered into the command line. The  
modem proceeds with the connect sequence in answer mode. The  
modem will enter the connected state after exchanging carrier with the  
remote modem. If no carrier is detected within a wait period specified in  
register S7 (default = 30 seconds), the modem will disconnect. Any  
further characters entered during the connect sequence will abort the  
command.  
Result Codes  
CONNECTXXXX  
If a connection is established (XXXX = telco line  
speed, e.g. 2400)  
NO CARRIER  
If a connection cannot be established, the abort  
timer (register S7) expires, or if the command is  
aborted  
4 - 6  
Trumpcard 14400/28800 Modem  
 
Modem Command Reference  
Bn — Set ITU-T or Bell Mode  
Parameters  
Default  
0, or 1  
1
Selects between ITU-T and Bell modes for a 1200 bps connection.  
Examples  
ATB0  
Selects ITU-T V.22bis and V.22 standards for  
communication at 2400 bps and 1200 bps.  
ATB1  
Selects Bell 212A for communication at 1200 bps  
Dn — Dial  
Parameters  
Default  
0-9 A B C D * # L P T R & ! @ W , ; ^ S=n  
P
This must be the last command on a command line. ATD causes the  
modem to go off-hook, dial according to the parameters entered, and  
attempt to establish a connection. If there are no parameters, then the  
modem goes off-hook in originate mode without dialling the number.  
Punctuation may be used for clarity. Parentheses, hyphens and spaces  
are ignored. If an invalid character is entered, that character and all  
subsequent characters in the dial string are ignored. The modem  
truncates dial strings to 40 characters.  
The ATD Parameters are:  
L
Dials the last dial string that was dialled.  
P
Use Pulse Dialling. Placed at the end of the command string and  
before the dial string. Causes the modem to pulse dial the numbers.  
T
Use DTMF Dialling. Placed at the end of the command string and  
before the dial string. Causes the modem to use DTMF tones to dial.  
R
Reverse Mode. Allows the modem to call an originate-only modem by  
forcing the call into answer mode. Must be entered as the last  
character of the command string (just before the [ENTER]).  
&
!
Wait for calling card bong. If bong is not detected within the time  
specified by S7 (default = 30 seconds), the modem disconnects and  
returns an error message.  
Hookswitch flash. Causes the modem to go on-hook for 700  
milliseconds and then off-hook.  
User’s Guide and Reference  
4 - 7  
 
Section Four  
@
Causes the modem to listen for 5 seconds of silence. If a 5 second  
silence has not been detected within the period specified in S7  
(default = 30 seconds), the modem disconnects and returns the NO  
ANSWER result code. If it detects a busy signal, it returns a BUSY  
result code. If the 5 seconds of silence is detected, then the modem  
continues dialling the dial string.  
W
Wait For Dial Tone Before Dialling. Causes the modem to wait for a  
dial tone up to the period of time specified in register S7 (default = 30  
seconds) before dialling the numbers that follow. If the modem  
detects a dial tone before the given time delay, it continues to dial.  
Otherwise, it goes on-hook.  
,
Pause During Dial. Inserted between digits in a dial string. Causes  
the modem to pause for the value given by register S8 (default = 2  
seconds), before dialling the next digit. This delay can be used in  
place of the "Wait For Dial Tone Before Dialling", but is not as  
sophisticated.  
;
Return To Command Mode After Dialling. Added to the end of a dial  
string. Causes the modem to remain in the command mode after it  
dials the digits proceeding the command. This allows the user to  
issue additional dial commands or dial strings without overflowing  
the command buffer. The modem looks for the carrier after the final  
dial command is issued. The Command ATHn aborts this command.  
^
Turn On Calling Tone. Turns on the periodic 1300 Hz calling tone if  
originating the call. Calling tone is enabled only on a call-by-call  
basis.  
S=n Dial Stored Number. Follows the dial command string. Causes the  
modem to dial a telephone number previously stored in directory  
location n using &Zn command.  
If ATD is entered without parameters, the modem goes off-hook and  
waits for a carrier; if the handshake is not completed within the specified  
time by register S7 (default = 30 seconds), the modem goes on-hook.  
The Dial command will be aborted in progress upon receipt of any  
character before completion of the handshake.  
Examples  
ATDT1-800-555-1212  
Dial long distance number  
Inserted pause  
ATDT9,555-4444  
ATDS=2  
Dial stored number  
4 - 8  
Trumpcard 14400/28800 Modem  
 
Modem Command Reference  
Result Codes  
NO DIAL TONE  
If X2 or X4 is selected and 1 second of dial tone is  
not detected within 5 seconds; or if W dial modifier  
is used and 3 seconds of dial tone is not detected  
within the time specified by S7  
BUSY  
If busy is detected, and X3 or X4 is selected or if dial  
modifier is used  
NO ANSWER  
If “@” dial modifier is used and 5 seconds of  
silence is not detected within the time specified by  
S7  
CONNECTXXXX  
NO CARRIER  
If a connection is established  
If a connection cannot be established, the abort  
timer (register S7) expires; or a character is entered  
during the handshake process  
En — Command Echo  
Parameters  
Default  
0 or 1  
1
Controls the echo of characters received by the modem while the modem  
is in the command mode. If both the modem and the software have echo  
on, double characters will appear. If no characters appear, then both  
character echoes are off.  
Examples  
ATE0  
ATE1  
Inhibits the echoing of commands  
Enables the echoing of commands  
Fn - Select Line Modulation (14400 only)  
Parameters  
Default  
0 through 10, 13 through 19  
0
This command can be used to assure that a connection is made only at  
the specified speed.  
Examples  
ATF0  
Selects auto-detect mode (equivalent to N1  
command)  
ATF1  
ATF2  
Permit V.21 or Bell 103 connections only based on  
ATBn setting.  
Reserved  
User’s Guide and Reference  
4 - 9  
 
Section Four  
ATF3  
Permit V.23 1200/75 bps connections only  
Permit V.22 1200 bps connections only  
ATF4  
ATF5  
Permit V.22bis 2400 bps connections only  
Permit V.22bis or V.32 4800 bps connections only  
Permit V.32bis or V.32 7200 bps connection only  
Permit V.32bis or V.32 9600 bps connections only  
Permit V.32bis 12000 connections only  
ATF6  
ATF7  
ATF8  
ATF9  
ATF10  
ATF13  
ATF14  
ATF15  
ATF16  
ATF17  
ATF18  
Permit V.32bis 14400 bps connections only  
Permit V.FC 14400 bps connection only  
*
Permit 16800 bps connections only  
Permit 19200 bps connections only  
Permit 21600 bps connections only  
Permit 24000 bps connections only  
Permit 26400 bps connections only  
*
*
*
*
*
ATF19  
Permit 28800 bps connections only  
*
* Only applicable to Trumpcard 28800 version  
+Ms Select Line Modulation (28800 only)  
Parameters  
0 through 3, 9 through 11, 64, 69, 74  
Default  
11  
This extended-format command selects the modulation, optionally  
enables or disables automode, and optionally specifies the lowest and  
highest connection rates using one to four sub-parameters. The  
command format is:  
+MS=<mod>[,[<automode>][,[<min.rate>][,[<max_rate>]]]]<CR>  
Sub-parameter Definitions  
1. <mod> = A decimal number which specifies the preferred modulation  
(automode enabled or the modulation (audomode disabled) to use in  
originating or answering a connection. the options are:  
w<mod> Modulation Possible Rates  
0
1
2
3
V21  
300  
V22  
1200  
V.22bis  
V.23  
2400 or 1200  
1200  
4 - 10  
Trumpcard 14400/28800 Modem  
 
Modem Command Reference  
9
V.32  
9600 or 4800  
10  
11  
V.32bis  
V.34  
14400, 12000, 9600, 7200, or 4800  
28800, 26400, 24000, 21600, 19200, 16800,  
14400, 12000, 9600, 7200, 4800, or 2400  
64  
69  
74  
Bell 103  
Bell 212  
VFC  
300  
1200  
28800, 26400, 24000, 21600, 16800, or 14400  
2. <automode> is an optional numeric value which enables or disables  
automatic modulation negotiation using V.8 or V.32bis annex a. The  
options are:  
<automode>  
OptionSelected  
Notes  
0
1
Automode disabled  
Automode enabled using V.8 or V32bis annex ADefault  
3. <min_rate> is an optional number which specifies the lowest rate at  
which the modem may establish a connection. The value is decimal  
coded, in units of bps, e.g., 2400 specifies the lowest rate to be 2400 bps.  
the default is 300 for 300 bps  
4. <max_rate> is an optional number which specifies the highest rate at  
which the modem may establish a connection the value is decimal  
coded, in units of bps, eg., 14400 specifies the highest rate to be 14400  
bps. the default is 28800 for 28800 bps  
Hn — Switch-Hook Control  
Parameters  
Default  
0 or 1  
0
If the user enters the command mode from the data mode issuing the  
escape sequence(+++), or as a result of an ON-to-OFF transition of DTR  
with the &D1 option in effect, the user may cause the modem to go on-  
hook (disconnect) by issuing the H0 command.  
Examples  
ATH0  
Causes the modem to go on-hook (hang-up)  
ATH1  
If the modem is on-hook, modem goes off hook,  
returns an OK response, and awaits further  
commands  
User’s Guide and Reference  
4 - 11  
 
Section Four  
In — Identification  
Parameters  
Default  
0 - 6  
0
Returns the product code, returns the checksum of the firmware ROM, or  
computes the checksum of the firmware ROM and reports its error status.  
The product code contains 3 digits. The checksum result consists of  
three ASCII numeric characters followed by a carriage return and a line  
feed. The error status line is either OK or ERROR.  
Examples  
ATI0  
Reports the product code  
ATI1  
Reports the checksum computed on the firmware  
ROM  
ATI2  
Performs a checksum on the firmware ROM and  
indicates OK or ERROR  
ATI3  
ATI4  
ATI5  
ATI6  
Reports firmware manufacturer identification  
Reports product identification  
Reports country code  
Reports hardware configuration  
Ln — Speaker Volume  
Parameters  
Default  
0, 1, 2, or 3  
2
Controls the internal speaker volume.  
Examples  
ATL0  
ATL1  
ATL2  
ATL3  
Selects low speaker volume  
Selects low speaker volume  
Selects medium speaker volume  
Selects high speaker volume  
Mn — Speaker Control  
Parameters  
Default  
0, 1, 2, or 3  
1
Selects when the speaker will be on or off.  
4 - 12  
Trumpcard 14400/28800 Modem  
 
Modem Command Reference  
Examples  
ATM0  
ATM1  
Speaker is always off  
Speaker is on during call establishment, but off  
when connected to a remote modem  
ATM2  
ATM3  
Speaker is always on  
Speaker is off when dialling or connected to a  
remote modem, but on during call answering  
Nn — Automode Detection  
Parameters  
Default  
0 or 1  
1
This command enables or disables automode detection  
Examples  
ATN0  
Automode detection is disabled. Subsequent  
connections will be based on the setting in Register  
S37, if S37=0 the speed of the connection must  
match that at which the last AT command was  
issued.  
ATN1  
Automode detection is enabled. Connections will be  
based on an automode algorithm. This command is  
equivalent to F0 command.  
On — Return To The On-Line State  
Parameters  
Default  
0 or 1  
none  
If the user enters the command mode from the data mode by issuing the  
escape sequence, or as a result of an ON-to-OFF transition of DTR with  
the &D1 option in effect, the user may return to the data mode without  
terminating a call by issuing the O0 command. This command may also  
be used to force a retrain. If the modem is on-hook, then the modem  
behaves as if it went off-hook to originate without actually taking the relay  
off-hook.  
Examples  
ATO0  
Causes the modem to return to the data mode  
ATO1  
Causes the modem to return to the data mode and  
to initiate a retrain when operating at 2400 bps.  
Also, adjusts the transmit level at 2400 bps to the  
Un setting.  
-
User’s Guide and Reference  
4 - 13  
 
Section Four  
Result Codes  
CONNECT XXXX  
NO CARRIER  
If a connection is established  
If retrain is not successful in the time specified by S7  
P — Set Pulse Dial as Default  
Parameters  
Default  
none  
none  
Causes the modem to assume that all subsequent dial commands are  
pulse dialled. The user may omit the "P" from the dial strings.  
Qn — Result Code Display  
Parameter  
Default  
0 or 1  
0
Determines whether or not the modem returns the result codes (see Xn  
command).  
Examples  
ATQ0  
ATQ1  
Allows the modem to return result codes  
Prohibits the modem from returning result codes  
Sn — Read/Write S Registers  
Parameters  
Default  
n = 0-95 x = 0-255  
none  
Selects a S register, reads or writes the contents of a S register, or reports  
the value of a S register. All the S registers may be read. If no parameter is  
entered, S0 is assumed. The “S” can be omitted to assume the last S-  
register accessed.  
All the registers will return the OK response if x is a legal value; however,  
some registers will not actually write the value anywhere.  
If the parameter number is beyond the range of the S-registers available,  
the modem will return the ERROR message. The value x is “MOD”ed with  
256, and if the result is outside the range permitted for a given S-register,  
the values will still be stored, but functionally, the lower and higher limits  
will be observed. Input and output is always in decimal format. Note that  
some S-registers are read-only.  
In some cases, writing to the S-register will appear to be accepted but the  
value will not actually be written.  
4 - 14  
Trumpcard 14400/28800 Modem  
 
Modem Command Reference  
Examples  
ATSn  
Establishes S-register n as the default register  
Set S-register n to the value x  
ATSn=x  
ATSn?  
Reports the value of S-register n  
T — Set Tone Dial as Default  
Parameters:  
Default:  
none  
none  
Causes the modem to assume that all subsequent dial commands are  
tone dialled. The user may omit the “T” from the dial string.  
Vn — Result Code Form  
Parameters  
Default  
0 or 1  
1
Selects whether the modem returns long form or short form result codes.  
All responses are ASCII values. Long-form (verbose) responses are  
preceded and terminated with both carriage return and line feed control  
characters. Short-form (numeric) responses are only terminated with a  
carriage return control character (see Xn command).  
Examples  
ATV0  
ATV1  
Allows short-form (numeric) result codes to be sent.  
Allows long-form (verbose) result codes to be sent.  
Wn — Connect Message Control  
Parameters  
Default  
0, 1, or 2  
0
This command controls which message(s) are reported upon connection.  
These messages can also be reported in either numeric or verbose form.  
For example, both 77 and PROTOCOL:LAP-M indicates that the error-  
correction protocol is LAP-M. (See Xn command.)  
Examples  
ATW0  
Upon connection report CONNECT XXXX only  
ATW1  
Upon connection report CARRIER XXXX,  
PROTOCOL XXXX and CONNECT XXXX  
ATW2  
Upon connection report CONNECT XXXX only  
User’s Guide and Reference  
4 - 15  
 
Section Four  
Xn — Extended Result Codes  
Parameters  
Default  
0, 1, 2, 3, or 4  
4
Determines whether the modem responds to dial tone and busy signals,  
and how it displays result codes for CONNECT messages. When the  
modem ignores dial tone, it waits for a time delay given by register S6  
(default = 2 seconds) and then dials regardless of presence or absence of  
dial tone; this is called blind dialling.  
Examples  
ATX0  
Modem ignores dial tone and busy signal. Sends  
only OK, CONNECT, RING, NO CARRIER, ERROR  
and NO ANSWER result codes. Connection is  
established by blind dialling.  
ATX1  
ATX2  
Same as X0 with the addition of sending CONNECT  
XXXX (XXXX = rate) result codes.  
Modem ignores busy signal but waits for dial tone.  
Sends only OK, CONNECT, RING, NO CARRIER,  
ERROR, NO ANSWER, NO DIALTONE and  
CONNECT XXXX (XXXX = rate) result codes.  
Dialtone must be detected within 5 seconds.  
ATX3  
ATX4  
Modem ignores dial tone but monitors for busy  
signals. Sends only OK, CONNECT, RING NO  
CARRIER, ERROR NO ANSWER, BUSY, and  
CONNECT XXXX (XXXX= rate) result codes.  
Connection is established by blind dialling.  
Modem monitors dialtone and busy signals. All  
result codes are enabled.  
4 - 16  
Trumpcard 14400/28800 Modem  
 
Modem Command Reference  
n Value in ATXn Command  
Result Codes — Q0, V1, Wn, S95  
Short Form LongForm  
0
1
2
3
4
0
OK  
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
1
CONNECT  
2
RING  
3
NO CARRIER  
4
ERROR  
5
CONNECT 1200  
NO DIAL TONE  
BUSY  
6
7
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
8
NO ANSWER  
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
9
CONNECT 0600  
CONNECT 2400  
CONNECT 4800  
CONNECT 9600  
CONNECT 7200  
CONNECT 12000  
CONNECT 14400  
CONNECT 19200  
CONNNECT 38400  
CONNECT 57600  
CONNECT 115200  
CONNECT 75TX/1200R  
CONNECT 1200TX/75RX  
CARRIER 300  
CARRIER 1200/75  
CARRIER 75/1200  
CARRIER 1200  
CARRIER 2400  
CARRIER 4800  
CARRIER 7200  
CARRIER 9600  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
22  
23  
40  
44  
45  
46  
47  
48  
49  
50  
X
X
X
X
X
X
X
X
Note: Carrier, Compression, and Protocol messages  
controlled by W command and S95.  
User’s Guide and Reference  
4 - 17  
 
Section Four  
Short Form  
Long Form  
n Value in ATXn Command  
0
1
2
3
4
51  
52  
53  
54  
55  
56  
57  
58  
59  
61  
62  
63  
64  
66  
67  
69  
76  
77  
80  
81  
CARRIER 12000  
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
CARRIER 14400  
X
X
CARRIER 16800 *  
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
CARRIER 19200 *  
CARRIER 21600 *  
X
X
CARRIER 24000 *  
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
CARRIER 26400 *  
CARRIER 28800 *  
CONNECT 16800 *  
CONNECT 21600 *  
CONNECT 24000 *  
CONNECT 26400 *  
CONNECT 28800 *  
COMPRESSION: CLASS 5  
COMPRESSION: V.42BIS  
COMPRESSION: NONE  
PROTOCOL: NONE  
PROTOCOL: LAP-M  
PROTOCOL: ALT  
X
X
X
X
X
X
X
PROTOCOL: ALT - CELLULAR  
Note: Carrier, Compression, and Protocol messages controlled by  
W command and S95.  
* Only applicable to Trumpcard 28800 version  
4 - 18  
Trumpcard 14400/28800 Modem  
 
Modem Command Reference  
Yn — Control Long Space Disconnect  
Parameters  
Default  
0 or 1  
0
Enable/disable the generation and response to long space disconnect.  
Examples  
ATY0  
Disable long space disconnect  
ATY1  
Enable long space disconnect. In non-error  
correction mode, a four second space will be sent  
prior to going on-hook. In error correction mode, the  
modem will be on-hook when it receives a  
continuous break greater than 1.6 seconds.  
Zn — Reset  
Parameters  
Default  
0 or 1  
0
Causes the modem to disconnect and performs a warm start. This  
command must be the last command on the command line. The reset  
actions are 1) Clear serial port buffers, 2) Set the baud rate and parity to  
match when any AT command is issued, 3) Restore the active  
configuration with the user profile denoted by the parameter, and 4) clear  
event based command buffers. The parameter n indicates which factory  
default values are to be loaded. Currently, the factory defaults for 0 and 1  
are the same.  
&Cn — DCD Option  
Parameters  
Default  
0 or 1  
0
Controls the Received Line Signal Detected (/RLSD) [Carrier Detect  
(DCD)] signal of the serial port.  
Examples  
AT&C0  
RLSD is ON regardless of the state of the data  
carrier from the remote modem  
AT&C1  
RLSD follows the state of the data carrier from the  
remote modem  
User’s Guide and Reference  
4 - 19  
 
Section Four  
&Dn — DTR Option  
Parameters  
Default  
0, 1, 2, or 3  
0
Determines actions taken by the modem in relation to the Data Terminal  
Ready (/DTR) signal of the serial port. The effect of /DTR loss depends  
upon the &D and &Q (&M) commands.  
The action for the event that follows /DTR loss is indicated in the following  
table:  
&D0  
&D1  
2
&D2  
3
&D3  
4
&Q0  
&Q1  
&Q2  
&Q3  
&Q4  
&Q5  
&Q6  
NONE  
1
2
3
3
2
2
2
3
3
3
3
3
3
4
3
3
4
4
4
3
3
1
NONE  
NONE  
The DTR-going-off events corresponding to the action numbers in the  
above table are:  
1. Modem disconnects and sends OK result code.  
2. Modem goes into command mode if in data mode and sends the OK  
result code.  
3. Modem disconnects, sends the OK result code, and disables auto  
answer while /DTR is OFF.  
4. Modem performs a warm start (i.e., same as Z command).  
&F — Restore Factory Configuration  
Parameters  
Default  
none  
none  
Loads the modem active configuration area with the factory default values.  
4 - 20  
Trumpcard 14400/28800 Modem  
 
Modem Command Reference  
&Gn — Set Guard Tone  
Parameters  
Default  
0, 1, or 2  
0
Normally, controls the generation of guard tone. This command is not  
implemented; however, the command structure is provided for application  
compatibility.  
&Jn — Telephone Jack Selection  
Parameters  
Default  
0 or 1  
0
The command structure is provided for application compatibility only and  
performs no function.  
&Kn — DTE/Modem Flow Control  
Parameters  
Default  
0, 3, 4, 5 or 6  
3
Determines how the modem controls the flow of data between the  
communications software and the modem. When the modem terminal  
buffer is nearly full, the modem will either send an XOFF command, or  
drop CTS to stop the data flow. When the buffer is nearly empty, the  
modem will either send an XON command, or raise CTS to start the data  
flow.  
The modem also responds to XON/XOFF characters, or RTS stimulus from  
the communications software by suspending or resuming transmission  
accordingly. The modem responds to XON/XOFF characters and also  
passes the XON/XOFF characters to the remote modem as data if  
transparent flow control is selected. When in Direct mode (&Q0), flow is  
not used and the modem ignores the setting of this command.  
Examples  
AT&K0  
Disables flow control  
AT&K3  
AT&K4  
AT&K5  
AT&K6  
Enables RTS/CTS flow control  
Enables XON/XOFF flow control  
Enables transparent XON/XOFF flow control  
Enables RTS/CTS and XON/XOFF flow control  
User’s Guide and Reference  
4 - 21  
 
Section Four  
&Ln — Line Type  
Parameters  
Default  
0 or 1  
0
Controls selection of leased line or dial-up line. Although the modem has  
only a single line connection, the power level is changed when setting  
leased line operation.  
Examples  
AT&L0  
AT&L1  
Dial-up line  
Leased line  
&Mn — Communication Mode  
Parameters  
Default  
0
None  
Same as &Q0.  
&Pn — Dial Pulse Ratio (disabled for the U.S.)  
Parameters  
Default  
0,1, 2 or 3  
0
Selects the ratio of the off hook (make) to an on-hook (break) interval used  
when pulse dialling.  
Examples  
AT&P0  
39%/61% make/break ratio @ 10 pps  
33%/67% make/break ratio @ 10 pps  
33%/67% make/break ratio @ 20 pps  
33%/67% make/break ratio @ 20 pps  
AT&P1  
AT&P2  
AT&P3  
&Qn — Communication Mode  
Parameters  
Default  
0, 4 through 6  
5
The modem supports three basic communication modes: asynchronous,  
autosync, and error correction.  
4 - 22  
Trumpcard 14400/28800 Modem  
 
Modem Command Reference  
Examples  
AT&Q0  
Selects asynchronous operation in the Direct mode.  
In this mode, the communications software speed  
must match the telco line speed.  
AT&Q4  
AT&Q5  
Selects AutoSync operation. Is used in conjunction  
with communications software that is compatible  
with the Hayes Synchronous Interface (HSI).  
Selects error correction mode. Modem negotiates  
an error-correction link. The modem can be  
configured to either disconnect or fallback to a  
normal asynchronous connection if the link cannot  
be negotiated (refer to register S36).  
&Q5 and S36=0 Same as \N2 command (no  
fallback)  
&Q5 and S36=1 Same as \N3 command (fallback)  
AT&Q6  
Selects asynchronous operation in Normal mode  
(Speed Buffering). In this mode, the communications  
software speed can differ from the telco line speed.  
&Rn — RTS/CTS Option  
Parameters  
Default  
0 or 1  
0
Controls the state of the Clear To Send (/CTS) signal operation, this can  
be altered if hardware flow control is enabled. (see &K command).  
Examples  
AT&R0  
CTS acts according to V.25bis handshake (i.e. /CTS  
tracks /RTS [Request To Send])  
AT&R1  
The modem ignores /RTS;/CTS is always ON  
&Sn — DSR Option  
Parameters  
Default  
0 or 1  
0
Determines whether Data Set Ready (/DSR) operates in accordance with  
EIA-232-D specification or remains ON.  
Examples  
AT&S0  
DSR is always ON  
AT&S1  
DSR is turned ON at start of handshaking and OFF  
when carrier is lost  
User’s Guide and Reference  
4 - 23  
 
Section Four  
&Tn — Test and Diagnostic  
Parameters  
Default  
0, 1, or 3 through 8  
4
Selects the test command. Test commands must be initiated in the  
command mode with asynchronous operation in the Direct mode selected  
(&Q0) at a speed of less than 14400 or 28800 (28800 version only).  
A telco line connection must be established prior to initiating digital  
loopback tests. If these conditions are not met, the modem issues the  
ERROR result code. If local analog loopback is initiated while the modem  
is connected, the modem disconnects before performing the test.  
An initiated test is active for a period of time specified by register S18 (test  
timer) before returning to the command mode. If S18 is zero, the test  
aborts when the user issues the &T0 command.  
Examples  
AT&T0  
End test in progress. The escape sequence (+++)  
must be issued to return the modem to the  
command mode prior to sending this command.  
Subsequent issuing of the O command while in the  
command mode will cause the local and remote  
modems to return to normal data mode operation if  
the interrupted test was digital loopback.  
AT&T1  
AT&T3  
Initiates local analog loopback. This test verifies the  
working condition of the path between the local  
communications software and the local modem. The  
characters received from the communications  
software are looped back by the modem.  
Initiates remote digital loopback locally. The  
characters received from the remote modem are  
looped back to the remote modem by the local  
modem. This test verifies the working condition of  
the path from a remote modem, through a local  
modem, and back to the remote modem.  
AT&T4  
AT&T5  
Allows the modem to respond to a request from a  
remote modem for a remote digital loopback test.  
Prohibits the modem from granting a request from a  
remote modem for a digital loopback test.  
4 - 24  
Trumpcard 14400/28800 Modem  
 
Modem Command Reference  
AT&T6  
AT&T7  
Initiates remote digital loopback. The characters  
received from the local communications software  
are transmitted to the remote modem and looped  
back from the remote modem to the local modem.  
This test verifies the working condition of the path  
between the local communications software and the  
remote modem.  
Initiates remote digital loopback with self test. This  
works similarly to &T6 except that the modem sends  
an alternating zeros and ones (0101) test pattern to  
the remote modem and continuously examines the  
validity of the returned data. The modem increments  
an internal error counter each time an error is  
detected. At the end of the test, the modem returns a  
3-digit error count.  
AT&T8  
Initiates local analog loopback with self test. This  
test works similarly to &T7 except that the test  
pattern is checked in the local analog loopback  
mode (as in &T1). This allows a thorough testing of  
the local modem transmit and receive functions  
without an actual telco line connection.  
&V — View Configuration and User Profiles  
Parameters  
Default  
none  
none  
Displays the active configuration and user profiles.  
Example  
AT&V  
ACTIVEPROFILE:  
B1 E1 L2 M1 N1 Q0 T V1 W0 X4 Y0 &C0 &D0 &G0 &J0 &K3 &Q5  
&R0 &S0 &T4 &X0 &Y0  
S00:000 S01:000 S02:043 S03:013 S04:010 S05:008 S06:002  
S07:030 S08:002 S09:006 S10:014 S11:095 S12:050 S18:000  
S25:005 S26:001 S36:007 S37:000 S38:020 S44:020 S46:138  
S48:007 S49:008 S95:000  
STORED PROFILE 0:  
B1 E1 L2 M1 N1 V1 W0 X4 Y0 &C0 &D0 &G0 &J0 &K3 &Q5 &R0  
&S0 &T4 &X0  
S00:000 S02:043 S06:002 S07:030 S08:002 S09:006 S10:014  
S11:095 S12:050 S18:000 S36:005 S37:000 S40:105 S41:135  
S46:138S95:000  
User’s Guide and Reference  
4 - 25  
 
Section Four  
STORED PROFILE 1:  
B1 E1 L2 M1 N1 V1 W0 X4 Y0 &C0 &D0 &G0 &JO &K3 &Q5 &R0  
&S0 &T4 &X0  
S00:000 S02:043 S06:002 S07:030 S08:002 S09:006 S10:014  
S11:095 S12:050 S18:000 S36:005 S37:000 S40:105 S41:135  
S46:138S95:000  
TELEPHONENUMBERS:  
0= 1=  
2= 3=  
&Wn — Store User Profile  
Parameters  
Default  
0 or 1  
none  
Saves the current configuration into non-volatile memory as one of two  
user profiles. These settings are restored to the active configuration upon  
receiving an Zn command or at power up (see &Y command). The user  
profile saved is denoted by the parameter value. This command will yield  
an ERROR message if unable to store the current configuration in non-  
volatile memory.  
Examples  
AT&W0  
AT&W1  
Save as user profile 0  
Save as user profile 1  
&Yn — Designate Default User Profile  
Parameters  
Default  
0 or 1  
0
Designates which of two user profiles will be loaded into the active  
configuration at power up. The user profile is denoted by the parameter  
value.  
Examples  
AT&Y0  
AT&Y1  
Selects user profile 0  
Selects user profile 1  
4 - 26  
Trumpcard 14400/28800 Modem  
 
Modem Command Reference  
&Zn=x — Store Phone Number  
Parameters  
Default  
n = 0, 1, 2, or 3, x = dial string  
none  
Stores a 36-digit dial string (x) in the specified entry (n) for later dialling.  
(See DSn command.)  
\Bn — Transmit Break  
Parameters  
1 through 9 (If n = 0, the default value is used; if n is  
greater than 9, 9 is used.)  
Default  
3
When this command is entered during a non-error correction connection,  
the modem sends a break signal to the remote modem. The length of the  
break is 100 times the n parameter value in milliseconds. If this command  
is entered during an error-correcting connection, the break will be sent via  
the error-correcting protocol giving no indication of length.  
Result Codes  
NO CARRIER  
If not connected  
\Gn — Modem-to-Modem Flow Control  
Parameters  
Default  
0 or 1  
0
The command applies in non-error correction mode; the modem enables  
or disables the generation or recognition of modem-to-modem XON/XOFF  
flow control.  
Examples  
AT\G0  
AT\G1  
Disables modem-to-modem flow control  
Enables modem-to-modem flow control  
\Kn — Break Control  
Parameters  
Default  
0 through 5 (If n is greater than 5, 5 is used.)  
5
Determines what the modem will do when a BREAK is received from the  
communications software or the remote modem. During error correction  
mode, the remote modem's BREAK control setting determines how the  
local modem will handle the BREAK.  
User’s Guide and Reference  
4 - 27  
 
Section Four  
Examples  
When a BREAK is received from the communications software when  
connected to a remote modem, the modem takes the following action:  
AT\K0,2,4  
AT\K1  
Modem enters the command mode (waiting for AT)  
without sending a BREAK to the remote modem  
Modem clears the terminal and modem buffers and  
sends a BREAK to the remote modem  
AT\K3  
Modem does not clear the buffers but sends a  
BREAK to the remote modem  
AT\K5  
Modem sends a BREAK to the remote modem in  
sequence with any transmitted data.  
When a BREAK is received from the remote modem during a non-error  
correction connection, the modem takes the following action  
AT\K0,1  
AT\K2,3  
AT\K4,5  
Modem clears the terminal and modem buffers and  
sends a BREAK to local communications software  
Modem does not clear buffers but sends a BREAK  
to the local communications software  
Modem sends a BREAK in sequence with any data  
being buffered, to the local communications  
software  
When a \B command is received from the communications software during  
a connection and in the Command mode, the modem takes the following  
action:  
AT\K0,1  
AT\K2,3  
AT\K4,5  
Modem clears the terminal and modem buffers and  
sends a BREAK to the remote modem.  
Modem does not clear buffers but sends a BREAK  
to the remote modem.  
Modem sends a BREAK in sequence with any data  
being buffered, to the remote modem.  
4 - 28  
Trumpcard 14400/28800 Modem  
 
Modem Command Reference  
\Nn — Operation Mode Control  
Parameters  
Default  
0, 1, 2, 3, 4, or 5  
3
Selects the operating mode the modem uses while connected (see &Qn  
command).  
Examples  
AT\N0  
Selects Normal (speed buffering) mode. This option  
takes effect at physical connection time.  
AT\N1  
AT\N2  
Same as AT\N0.  
Selects reliable link mode. This defines the modem-  
to-modem connection to require error correction  
connection. If an attempt to establish the reliable  
link fails, the modem disconnects.  
AT\N3  
Selects auto-reliable link mode. The modem will  
attempt an error-correction connection but will  
fallback to Normal mode if unable to establish an  
error correcting connection. This command takes  
effect at physical connection time only.  
AT\N4  
AT\N5  
Selects LAPM error-correction mode. The modem  
will attempt a LAPM error-correction connection. If  
the attempt fails, the modem disconnects.  
Selects MNP error-correction mode. The modem will  
attempt a MNP error-correction connection. If the  
attempt fails, the modem disconnects.  
%Cn — Compression Control  
Parameters:  
Default  
0, 1, 2, or 3  
3
Enables or disables data compression negotiation. The modem can only  
perform data compression on an error-correcting link.  
Examples  
AT%C0  
Disables data compression  
AT%C1  
AT%C2  
AT%C3  
Enables MNP 5 data compression  
Enables V.42bis data compression  
Enables both MNP 5 and V.42bis data compression  
User’s Guide and Reference  
4 - 29  
 
Section Four  
%En — Enable/Disable Line Quality Monitor  
Parameters  
Default  
0-3  
2
Controls whether or not the modem will automatically monitor the line  
quality and request a retrain, or fall back when line quality is insufficient,  
or fall forward if line quality is sufficient.  
Examples  
AT%E0  
Disable line quality monitor  
AT%E1  
AT%E2  
Enable line quality monitor and auto-retrain  
Enable line quality monitor and fall back / fall  
forward  
AT%E3  
Enable line quality monitor and auto-retrain, but  
hang-up immediately when EQM reaches hang-up  
threshold  
%L — Report Received Signal Level  
Parameters  
Default  
none  
none  
Returns a value identifying the received signal level. The possible values  
are:  
009 = Received level of -9 dBm  
010 = Received level of -10 dBm  
011 = Received level of -11 dBm  
.
.
.
043 = Received level of -43 dBm  
If the received level is greater than -9 dBm, 009 will be reported. If the  
received level is less than -43 dBm, 043 will be reported.  
%Q — Report Line Signal Quality  
Parameters  
Default  
none  
none  
4 - 30  
Trumpcard 14400/28800 Modem  
 
Modem Command Reference  
Returns the high-order byte of the calculated Eye Quality Monitor (EQM)  
value. The value for a normal connection ranges from about 0 to 2 and  
approaches 8 for a progressively poorer connection.  
-Kn — MNP Extended Services  
Parameters  
Default  
0, 1 or 2  
1
Enables the modem to investigate the capabilities of the modem's MNP10  
capacity, and determine whether a V.42 LAPM connection will be  
converted to an MNP connection. When -K1 is set on both modems, a  
LAPM connection will be converted to an MNP10 connection.  
Examples  
AT-K0  
Disable V.42 LAPM to MNP 10 conversion  
Enable V.42 LAPM to MNP 10 conversion  
AT-K1  
AT-K2  
Enable V.42 LAPM to MNP 10 conversion; inhibit  
MNP extended services initiation during V.42 LAPM  
detection phase  
*Hn — Link Negotiation Speed  
Parameters  
Default  
0, 1 or 2  
0
Sets the connection speed for link negotiation before upshift occurs  
between modems. When poor telephone lines are anticipated, the *H1  
command should be used to set the connection speed to 1200 bps to  
facilitate link negotiation. If this command is set to a 1 and the modem  
connects in LAPM, the connection speed will be fixed at 1200 bps.  
Examples  
AT*H0  
Link negotiation occurs at the preferred line speed  
Link negotiation occurs at 1200 bps  
AT*H1  
AT*H2  
Link negotiation occurs at 4800 bps  
)Mn — Transmit Level Adjustment for Cellular  
Connection  
Parameters  
Default  
0 or 1  
0
User’s Guide and Reference  
4 - 31  
 
Section Four  
Enables adjustment of the transmit levels based on attenuation and  
possibly, signal-to-noise ratio of the line to minimize the "clipping". The  
transmit levels are adjusted only when retrain and speed shift are  
performed.  
Examples  
AT)M0  
No transmit level adjustment, fixed at -10 dBm  
[adjust power level if remote is set to )M1]  
AT)M1  
Adjust transmit level during retrain speed shift  
:En — Compromise Equalizer  
Parameters  
Default  
0 or 1  
1
Enables or disables the V.32 compromise equalizer.  
Examples  
AT:E0  
AT:E1  
Disable the equalizer  
Enable the equalizer  
@Mn — Initial Cellular Power Level  
Parameters  
Default  
0 - 31  
0 (-26dBm)  
Sets the initial power level for upshift at connect until line conditions can  
be determined.  
Examples  
AT@M0  
-26dBm  
-30dBm  
-10dBm  
-11dBm  
-12dBm  
AT@M1  
AT@M2-@M10  
AT@M11  
AT@M12  
.
.
4 - 32  
Trumpcard 14400/28800 Modem  
 
Modem Command Reference  
.
AT@M30  
AT@M31  
-30dBm  
-31dBm  
[n init string] — Event Based Command  
Parameters  
n = 0 or 1  
init string = any valid AT command(s) except  
Z (reset)  
n = 0  
Defaults  
init string = NULL  
The event based command is unique in that it allows single or multiple AT  
commands to be associated with an event identified by an event identifier  
“n”. Currently only two events are identified; event 0 indicates that the  
modem is currently operating using a land line based communication line;  
event 1 indicates that the modem is currently operating using a cellular  
based communications line. These events can change dynamically, and  
thus whenever a change is detected the modem will execute the AT  
commands associated with the event automatically.  
Multiple event based commands can be on the same command line or  
can be entered on separate command lines. The AT command(s)  
associated with an event are stored in volatile memory, powering off the  
modem or executing the ATZ command will clear the command(s). A  
NULL init string will also serve as a way of clearing command(s)  
associated with an event.  
All commands between the [n and then next], or [n, or the end of the  
command line will be associated with the event n. All commands will be  
verified and commands that require interaction or return information  
should not be used since these will be executed based on changing  
events.  
Examples  
AT[0&F&C1&D2&S1W1S95=18]  
The above command stores the &F&C1&D2&S1W1S95=18  
commands for event 0 (land based connection) and will be  
automatically executed when a change of event from cellular  
back to land based is detected.  
AT&F&C1&D2&S1[0S95=18][1S95=44)M1*H2:E0]  
User’s Guide and Reference  
4 - 33  
 
Section Four  
The above command processes the &F&C1&D2&S1 once when  
the command line is first entered, the S95=18 whenever  
operating as a land based connection and S95=44)M1*H2:E0  
whenever operating as a cellular based connection.  
AT[] or AT[0]  
The above command clears any command(s) associated with  
event 0 (land based connection).  
Modem S Registers  
The S registers are summarized below along with their default values.  
Registers denoted with an * may be stored in one of the two user profiles  
by entering the &Wn command. One of these profiles may be loaded at  
any time by using the Zn command.  
Default Register Settings  
The factory default values are stored in ROM and are loaded into the  
active configuration at power up or by the Zn command. In addition, the  
designated default profile is subsequently loaded, and may change some  
of the factory default values. The designated default profile can be  
changed by entering the &Yn command where n is one of the two  
possible user profiles. All of the factory default values may be loaded at  
any time by entering the &F command.  
Modem Register Summary  
Register  
S0 *  
S1  
Title  
Default  
Number of Rings Till Auto-Answer  
Ring Counter  
0
0
S2 *  
S3  
Escape Character  
43  
13  
10  
8
Carriage Return Character  
Line Feed Character  
Back Space Character  
Wait For Blind Dialling *  
Wait For Carrier After Dial  
Pause Time For Dial Delay  
S4  
S5  
S6  
2
S7 *  
S8 *  
50  
2
4 - 34  
Trumpcard 14400/28800 Modem  
 
Modem Command Reference  
S9 *  
Carrier Detect Response Time  
Lost Carrier To Hang Up Delay  
DTMF Tone Duration  
Escape Code Guard Time  
Reserved  
6
S10  
14  
S11 *  
S12 *  
S13  
95  
50  
none  
138  
none  
0
S14 *  
S15  
Bit Mapped Options **  
Reserved  
S16  
Bit Mapped Test Options **  
Reserved  
S17  
none  
0
S18 *  
S19  
Test Timer  
Reserved  
0
S20  
Reserved  
none  
4
S21 *  
S22 *  
S23 *  
S24  
Bit Mapped Options **  
Bit Mapped Options **  
Bit Mapped Options **  
Sleep Inactivity Timer  
Delay To DTR  
117  
55  
10  
S25 *  
S27 *  
S28  
5
Bit Mapped Options **  
Bit Mapper Options  
Reserved  
74  
0
S29  
none  
0
S30 *  
S31  
Inactivity Timer  
Bit Mapper Options **  
XON Flow Control Character  
Title  
194  
17  
S32  
Register  
S33  
Default  
19  
XOFF Flow Control Character  
Reserved  
S34-S35  
S36 *  
S37 *  
S38 *  
S39 *  
S40  
none  
7
LAPM Failure Control  
Desired Telco Line Speed  
Delay Before Forced Disconnect  
Bit Mapped Options **  
Bit Mapped Options (MNP) **  
Bit Mapped Options (MNP) **  
Unused  
0
20  
3
105  
03  
S41  
S44  
none  
138  
7
S46 *  
S48 *  
S86  
Protocol Selection  
V.42 Negotiated Action  
Connection Failure Cause Code  
0
User’s Guide and Reference  
4 - 35  
 
Section Four  
S95 *  
Extended Result Codes  
0
* Register value may be stored in one of two user profiles with the AT&Wn  
command.  
** Writing to bit mapped options registers, although possible, can result in  
unreliable and  
unpredictable operation.  
4 - 36  
Trumpcard 14400/28800 Modem  
 
Modem Command Reference  
RegisterDescriptions  
S0 — Number of Rings Till Auto-Answer  
Range  
Default  
0-255 rings  
0
Establishes the number of rings required before the modem answers the  
incoming calls. Setting this register to zero disables auto-answer mode.  
S1 — Ring Counter  
Range  
Default  
0-255 rings  
0
Number of rings which the modem detects before it answers a call. If no  
rings occur over an eight second interval, the register is cleared.  
S2 — Escape Character  
Range  
Default  
0-255, ASCII decimal  
43  
S2 holds the decimal value of the ASCII character used as the escape  
character. The default value corresponds to an ASCII '+'. A value over 127  
disables the escape process, i.e., no escape character will be recognized.  
S3 — Carriage Return Character  
Range  
Default  
0-127, ASCII decimal  
13 (Carriage Return)  
Sets the command line and result code terminator character. Pertains to  
asynchronous operation only.  
S4 — Line Feed Character  
Range  
Default  
0-127, ASCII decimal  
10 (Line Feed)  
Sets the character recognized as a line feed. Pertains to asynchronous  
operation only. The Line Feed control character is output after the  
Carriage Return control character if verbose result codes are used.  
User’s Guide and Reference  
4 - 37  
 
Section Four  
S5 — Backspace Character  
Range  
Default  
0-32, ASCII decimal  
8 (Backspace)  
Sets the character recognized as a backspace. Pertains to asynchronous  
operation only. The modem will not recognize the Backspace character if  
it is set to a value that is greater than 32 ASCII. This character can be used  
to edit a command line. When the echo command is enabled, the modem  
echoes back to the local communications software the Backspace  
character, an ASCII space character, and a second Backspace character;  
this means a total of three characters are transmitted each time the  
modem processes the Backspace character.  
S6 — Wait Time for Blind Dialling  
Range  
Default  
2-255 seconds  
2
Sets the length of time to pause after the modem goes off-hook and before  
the modem dials the first digit of the telephone number. The modem  
always pauses a minimum of 2 seconds even if the S6 register is set to a  
value less than 2 seconds. The "Wait for Dial Tone" call progress feature  
(W in the dial string) will override the value in register S6. If option X2 or  
X4 is in effect, this register is ignored.  
S7 — Wait For Carrier After Dial  
Range  
Default  
1-255 seconds  
50  
Defines two delay times:  
1. During call establishment, this register establishes the time that the  
local modem waits for carrier from the remote modem before hanging  
up.  
2. Sets the length of time that the modem waits when the "Wait For Dial  
Tone" call progress feature (W in the dial string) is in effect.  
S8 — Pause Time For Dial Delay  
Range  
0-255 seconds  
4 - 38  
Trumpcard 14400/28800 Modem  
 
Modem Command Reference  
Default  
2
Sets the length of time to pause when the modem encounters the "Pause  
During Dial" call progress feature, i.e., the comma (,).  
S9 — Carrier Detect Response Time  
Range  
Default  
1-255 tenths of second  
6 (0.6 seconds)  
Determines how long a carrier signal must be present before the modem  
recognizes it as a carrier and turns on /RLSD. As this time is increased,  
there is less chance to detect a false carrier due to noise from the telco  
line.  
S10 — Lost Carrier To Hang Up Delay  
Range  
Default  
1-255 tenths of a second  
14 (1.4 seconds)  
Sets the length of time the modem waits before hanging up after a loss of  
carrier. This allows for a temporary carrier loss without causing the local  
modem to disconnect. When register S10 is set to 255, the modem  
functions as if carrier is always present.  
The actual interval the modem waits before disconnecting is the value in  
register S10 minus the value in register S9. Therefore, the S10 value must  
be greater than the S9 value or else the modem disconnects before it  
recognizes the carrier.  
S11 — DTMF Tone Duration  
Range  
Default  
50-255 milliseconds  
95 milliseconds  
Sets the duration of tones in Dual Tone Multifrequency (DTMF) dialling.  
This value has no effect on pulse dialling.  
S12 — Escape Code Guard Time  
Range  
Default  
0-255 fiftieths of a second  
50 (1 second)  
Sets the time delay required immediately before and after entering the  
escape code. The time interval between the sending of the first and  
second, or the second and the third escape code characters must be less  
than the value of the guard time.  
User’s Guide and Reference  
4 - 39  
 
Section Four  
S18 — Test Timer  
Range  
Default  
0-255 seconds  
0
Sets the length of time the modem conducts a test before returning to the  
command mode. If this register is zero, the test will not automatically  
terminate; the test must be terminated from the command mode by issuing  
an &T0 or H command.  
S24 — Sleep Inactivity Timer  
Range  
Default  
0-255 seconds  
10 seconds  
Sets the length of time, in seconds, that the modem will wait before  
entering power down sleep mode. The time is reset by any data activity or  
telephone line activity. A value of zero will disable power down sleep  
mode.  
S25 — Delay to DTR  
Range  
Default  
0-255 (hundredths of a second)  
5
A change in /DTR (ON-to-OFF) that persists for a period shorter than the  
value held in S25 is ignored by the modem while it is in data mode.  
S30 — Inactivity Timer  
Range  
Default  
0-255  
0 (disabled)  
Determines the length of time, in ten-second intervals, that the modem will  
wait before disconnecting when no data is sent or received. In MNP or  
V.42 mode, any data transmitted or received will reset the timer. In other  
modes, any data transmitted will reset the timer. The inactivity timer is  
inoperative in synchronous mode.  
4 - 40  
Trumpcard 14400/28800 Modem  
 
Modem Command Reference  
S32 — XON Character  
Range  
0-255  
Default  
17  
Sets the value of the XON character.  
S33 — XOFF Character  
Range  
0-255  
Default  
19  
Sets the value of the XOFF character  
S36 — LAPM Failure Control  
Range  
Default  
0-7  
7
This register is used when the S48 register contains the value 128 and an  
attempted error correction link fails. These fallback options are initiated  
immediately upon connection if S48 = 128.  
If an invalid number is entered, the number is accepted into the register,  
but S36 will act as if the default value is entered.  
The S36 actions are:  
S36 = 0  
S36 = 1  
Modem disconnects.  
Modem stays on-line and a Direct mode connection  
is established.  
S36 = 2  
S36 = 3  
Reserved.  
Modem stays on-line and a Normal mode  
connection is established.  
User’s Guide and Reference  
4 - 41  
 
Section Four  
S36 = 4  
An MNP connection is attempted, and if it fails, the  
modem disconnects.  
S36 = 5  
An MNP connection is attempted, and if it fails, a  
Direct mode connection is established.  
S36 = 6  
S36 = 7  
Reserved.  
An MNP connection is attempted, and if it fails, a  
Normal mode connection is established.  
S37 — Desired Telco Line Speed  
Range  
Default  
0-12  
0
This register determines the desired telco line speed if the N0 command is  
in effect.  
If an invalid number is entered, the number is accepted into the register,  
but S37 will act as if the default value is entered.  
S37 = 0  
S37 = 1-3  
S37 = 4  
S37 = 5  
S37 = 6  
S37 = 7  
S37= 8  
Attempt automode connection.  
Attempt to connect at 300 bps.  
Reserved.  
Attempt to connect at V.22 1200 bps.  
Attempt to connect at V.22bis 2400 bps.  
Attempt to connect in V.23 75/1200 mode.  
Attempt to connect at V.32bis/V.32 4800 bps  
Attempt to connect at V.32bis/V.32 9600 bps  
Attempt to connect at V.32bis 12000 bps  
Attempt to connect at V.32bis 14400 bps  
Attempt to connect at V.32bis 7200 bps.  
Attempt to connect at V.FC 14400 bps  
S37=9  
S37=10  
S37=11  
S37=12  
S37=15  
S37=16  
S37=17  
S37=18  
S37=19  
S37=20  
S37=21  
Attempt to connect at 16800 bps  
Attempt to connect at 19200 bps  
Attempt to connect at 1600 bps *  
Attempt to connect at 24000 bps  
Attempt to connect at 26400 bps  
Attempt to connect at 28800 bps  
*
*
*
*
*
* Only applicable to Trumpcard 28800 version  
4 - 42  
Trumpcard 14400/28800 Modem  
 
Modem Command Reference  
S38 — Delay Before Forced Disconnect  
Range  
Default  
0-255 seconds  
20  
This register specifies the delay between the modem's receipt of the  
Hangup (H) command to disconnect (or ON-to-OFF transition of /DTR if  
the modem is programmed to follow the signal) and the disconnect  
operation. For an error-correction connection, this register can be used to  
ensure that data in the modem buffer is sent before the modem  
disconnects. If S38 is set between 0 and 254, the modem will wait that  
number of seconds for the remote modem to acknowledge all data in the  
modem buffer before disconnecting. If time expires before all data is sent,  
the NO CARRIER result code will be issued to indicate that data has been  
lost. If all data is transmitted prior to timeout, the response to the H0  
command will be OK. If S38 is set to 255, the modem data does not  
timeout, and continues to attempt to deliver data in the buffer until the  
connection is lost, or the data is delivered.  
S46 — Protocol Selection  
Range  
136 or 138  
Default  
136  
Controls selection of compression.  
The following actions are executed for the given values:  
S46 = 136  
S46 = 138  
Execute error correction protocol with no  
compression.  
Execute error correction protocol with compression.  
In addition to V.42bis, the modem also implements  
MNP4 data compression. V.42bis is used only with  
LAPM, and MNP5 only with MNP4.  
User’s Guide and Reference  
4 - 43  
 
Section Four  
S48 — V.42 Negotiation Action  
Range  
Default  
0,7, or 128  
7
The V.42 negotiation process determines the capabilities of the remote  
modem. However, when the capabilities of the remote modem are known  
and negotiation is unnecessary, the process can be bypassed if desired.  
If an invalid number is entered, it is accepted into the S register, but S48  
will act as if 128 is entered.  
S48 = 0  
Disable negotiation; bypass the detection and  
negotiation phases; and proceed with LAPM.  
S48 = 7  
Enable negotiation.  
S48 = 128  
Disable negotiation; bypass the detection and  
negotiation phases; and proceed at once with the  
fallback action specified in S36. Can be used to  
force MNP.  
S86 — Connection Failure Cause Code  
Range  
Default  
0, 4, 5, 9, 12, 13, or 14  
0
When the modem issues a NO CARRIER result code, a value is written to  
this S register to help determine the reason for the failed connection. S86  
records the first event that contributes to a NO CARRIER message.  
The cause codes are:  
S86 = 0  
S86 = 4  
S86 = 5  
Normal disconnect, no error occurred  
Loss of carrier  
V.42 negotiation failed to detect an error-correction  
modem at the other end  
S86 = 9  
The modems could not find a common protocol  
Normal disconnect initiated by the remote modem  
S86 = 12  
S86 = 13  
Remote modem does not respond after 10  
re-transmissions of the same message  
S86 = 14  
Protocol violation  
4 - 44  
Trumpcard 14400/28800 Modem  
 
Modem Command Reference  
S95 — Extended Result Codes  
The bits in this register can be set to override some of the Wn command  
options. A bit set to a 1 in this register will enable the corresponding result  
code regardless of the Wn setting.  
Bit 0  
Bit 1  
CONNECT result code indicates DCE speed instead  
of DTE speed  
Append/ARQ to verbose CONNECT XXXX result  
code if protocol is not NONE  
Bit 2  
Bit 3  
Bit 4  
Bit 5  
Bit 6  
Bit 7  
Enable CARRIER XXXX result code  
Enable PROTOCOL XXXX result code  
Reserved  
Enable COMPRESSION result code  
Reserved  
Reserved  
User’s Guide and Reference  
4 - 45  
 
Section Four  
Facsimile Commands  
Fax commands are listed here only for reference. Use of these commands  
should be limited to fax application software.  
If you have additional questions about the Trumpcard facsimile operation,  
please contact Ositech (our address and telephone number are in the  
front of this manual).  
Class 1 Commands  
Command  
+FTS=n  
+FRS=n  
+FTM=n  
+FRM=n  
+FTH=n  
+FRH=n  
Description  
Stop transmission and wait  
Receive silence  
Transmit data  
Receive data  
Transmit data with HDLC framing  
Receive data with HDLC framing  
Class 2 Commands  
Action Commands  
Command  
D
Description  
Originate a call  
A
Answer a call  
+FDT=  
+FET=N  
+FDR  
+FK  
Data transmission  
Transmit page punctuation  
Begin or continue phase C receive data  
Session termination  
4 - 46  
Trumpcard 14400/28800 Modem  
 
Modem Test Procedures  
Section Five  
Modem Test Procedures  
This section of the manual describes the different tests that you can  
perform when you are trying to find the source of a problem.  
•
•
•
•
•
•
•
Local Modem Self-Test  
Local Analog Loopback  
Local Analog Loopback with Self-Generated Pattern  
Remote Digital Loopback  
Remote Digital Loopback with Self-Generated Pattern  
Local Digital Loopback  
Testing Modem Memory  
User’s Guide and Reference  
5- 1  
 
Section Five  
Local Modem Self-Test  
To run a local self-test:  
1. Put the Modem into interactive or local mode. Refer to the  
communications software manual for this information.  
2. Enter AT [ENTER]. The Modem will respond with OK. If you cannot  
see the letters you entered, the local Modem echo is OFF. To turn on  
the local Modem echo, enter ATE1 [ENTER].  
If double characters appear on the screen, both the Modem and  
software are set to local echo ON. To set the Modem to local echo off,  
enter ATE0 [ENTER].  
If 0appears on your screen in place of OK, the numeric form result  
codes have been enabled. To select textual result codes, enterATV1  
[ENTER]. The Modem will respond with OK.  
If the Modem does not respond:  
•
•
Ensure that the communications software setup procedure  
was run after the Modem was installed. Setup must be run  
each time the Modem is installed.  
Check that the COM port address of the serial port is identical  
to the software COM port assignment.  
5 - 2  
Trumpcard 14400/28800 Modem  
 
Modem Test Procedures  
Local Analog Loopback  
This test checks the path between the local Modem and the PC. The test  
is only functional when the Modem is in direct mode (&Q0) and the COM  
port baud rate is set to 14400 bps (Trumpcard 14400) / 28800 bps  
(Trumpcard 28800) or less.  
To start this test, the Modem must be in command mode.  
To run this test:  
1. Enter AT&T1 [ENTER]. Wait until the Modem returns a CONNECT  
message.  
2. Enter a test message. For example, “This message should be  
echoed back.”  
The message should immediately appear on the screen as you enter  
it.  
3. Enter +++(the escape sequence).  
The Modem will respond with OK. The Modem is now in command  
mode.  
4. Enter AT&T0 [ENTER]to end the test.  
User’s Guide and Reference  
5- 3  
 
Section Five  
Local Analog Loopback with Self-  
Generated Pattern  
This test verifies the integrity of the local Modem transmit and receive  
circuits. The test is only functional when the Modem is in direct mode  
(&Q0) and the COM port baud rate is set to 14400 bps (Trumpcard 14400)  
/ 28800 bps (Trumpcard 28800) or less.  
For this test, the Modem must be in command mode.  
To start the test:  
1. Enter AT&T8 [ENTER]and wait for a while. The Modem will not  
respond visibly.  
2. Enter AT&T0 [ENTER]to mark the end of the test. The Modem will  
respond with a three-digit number indicating the test results.  
During this test, a continuous data sequence is sent by the local Modem  
transmitter and picked up by the local Modem receiver. The transmitted  
and received data sequences are compared and the Modem then returns  
a three-digit number indicating test results. If the result is 000, the local  
Modem transmit and receive circuits have passed the test.  
5 - 4  
Trumpcard 14400/28800 Modem  
 
Modem Test Procedures  
Remote Digital Loopback  
This test checks the local and remote modems and the telephone circuit.  
The test is only functional when the Modem is set to direct mode (&Q0)  
and the COM port baud rate is set to 14400 bps (Trumpcard 14400) /  
28800 bps (Trumpcard 28800) or less.  
A message is sent to the remote unit by the Modem. The remote unit  
loops the test message back. The received message is then compared  
with the previously transmitted message to verify the connection. If the  
data patterns do not match, then there is a problem with either the local or  
remote Modem or the telephone circuit. If this is the case, both local and  
remote stations may initiate local analog loopback tests to further isolate  
the source of the problem.  
To perform this test:  
1. Enter AT&F&Q0 [ENTER] to put the Modem in basic asynchronous  
mode.  
2. Establish a connection with a remote Modem and enter +++(the  
escape sequence) to revert to command mode. The Modem will reply  
with OK.  
3. Enter AT&T6 [ENTER]to begin the test. The Modem will display a  
CONNECTresponse if the loopback data link has been successfully  
completed. It will display an ERRORresponse if the link has failed.  
If successful, key in a test message. The message will be echoed on  
the local screen.  
4. Enter +++(the escape sequence). The Modem will respond with OK.  
5. Enter AT&T0 [ENTER]to end the test. The Modem will respond with  
OK.  
User’s Guide and Reference  
5- 5  
 
Section Five  
Remote Digital Loopback with Self-  
Generated Pattern  
This procedure tests the remote Modem port, the telephone line, the local  
serial and Modem ports. The test is only functional when the Modem is in  
direct mode (&Q0) and the COM port baud rate is set to 14400 bps  
(Trumpcard 14400) / 28800 bps (Trumpcard 28800) or less.  
This test is similar to the Remote Digital Loopback test.  
In this test, the local Modem sends the remote Modem a special test data  
sequence and the remote Modem echoes the data back. The local  
Modem examines the returned data and establishes an error count each  
time a mismatch is detected.  
To run this test:  
1. Establish a connection with a remote Modem.  
2. Enter AT&T4 [ENTER]to ensure that the remote operator has set the  
Modem to accept a Remote Digital Loopback request.  
3. Enter AT&T7 [ENTER]to initiate the remote digital loopback test. The  
Modem will send a test pattern to the remote Modem.  
4. Enter AT&T0 [ENTER]to end the test. The Modem will return a three-  
digit number showing the test results. If the result is 000, the local and  
remote modems, and the telephone line have passed the test.  
5 - 6  
Trumpcard 14400/28800 Modem  
 
Modem Test Procedures  
Local Digital Loopback  
This test is used to verify the communications link and the remote  
Modem, and is only functional when the Modem is in direct mode (&Q0)  
and the COM port baud rate is set to 14400 bps (Trumpcard 14400) /  
28800 bps (Trumpcard 28800) or less.  
To run this test:  
1. Establish a connection with a remote Modem.  
2. Enter AT&T3 [ENTER]to put the Modem into the local digital  
loopback mode.  
3. Instruct the remote Modem operator to enter a message.  
During this test the local Modem simply loops back any incoming  
data to the remote Modem. If the information sent and received by the  
remote Modem are identical, the test is successful.  
4. Enter AT&T0 [ENTER]to end the test.  
User’s Guide and Reference  
5- 7  
 
Section Five  
Testing Modem Memory  
The I command can be used to obtain information on the modem’s  
memory and perform a checksum test.  
Product Information  
This test displays the modem’s product information.  
1. Enter ATI3 [ENTER]. The Modem will respond with a line identifying  
the Modem and its capabilities. Use this information when calling  
Ositech for technical support.  
ROM Checksum Test  
This test compares the ROM checksum result with a stored value.  
1. Enter ATI2 [ENTER]to run this test. The Modem will respond with  
the OK prompt if the totals match and an ERRORprompt if they differ.  
If the ERRORprompt appears, call Ositech technical support.  
5 - 8  
Trumpcard 14400/28800 Modem  
 

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