TRENDnet TFM-PCIV92A User Manual

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TFM-PCIV92A User’s Guide
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Rev.1.00.2.1.34

Appendix 2

AT command set

Executing commands

Your modem is in Command Mode upon power-on and is ready to receive and execute AT commands. The

modem remains in Command Mode until it makes a connection with a remote modem. Commands may be

sent to the modem from an attached terminal or a PC running a communication program. This modem is

designed to operate at common DTE speeds ranging from 115.2 Kbps to 300 bps. All commands and data

must be issued to the modem using one of the valid DTE speeds.

AT commands and format

All commands must begin with the AT prefix, followed by the command letter and ended with the ENTER key.

All default settings are printed in bold text. Spaces are allowed in the command string to increase command

line readability but are ignored by the modem during command execution. All commands may be typed in

either upper or lower case, but not mixed. A command issued without any parameters is considered as

specifying the same command with a parameter of "0".

Example: ATL [ENTER]

This command causes your modem to lower its speaker volume.

AT Command Summary

Repeat last command

Answer

Select V.22/V.21

Select B212A/B103

B15

Select V.21 when the modem is at 300 BPS

B16

Select Bell 103J when the modem is at 300 BPS

Dial

0 - 9

Dialing digits

ABCD*# Tone dial characters

Redial last number

Pulse dial

Tone dial

The modem switches to speakerphone mode and dials the number

The modem goes into answer mode directly after finish dialing

S=n

Dial stored telephone number n

Wait for dial tone

AT Command prefix

TFM-PCIV92A User’s Guide
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Rev.1.00.2.1.34

Pause the time specified in S-register S8

Flash hook

Wait for quiet answer

Disable data calling tone transmission

Bong tone detection

;

Return to command mode

Disables echo

Enables echo

Hang up the telephone line

Pick up the telephone line

Reports modem identify string and driver version number

Calculate ROM checksum and report it to DTE

Verifies ROM checksum and report OK or ERROR

Report modem identify string and driver version number

Report firmware version for datapump

Report the board/firmware ID, country ID and subsystem vendor ID

Report country ID

I11

Report connection information

Low speaker volume

Medium speaker volume

High speaker volume

Speaker always off

Speaker on until carrier present

Speaker always on

Speaker off during dialing; speaker on until carrier present

Handshake only at the communication standard specified by S37 and

ATB command

Begin the handshake at the communication standard specified by s37 and ATB,

and fallback to lower speed may occur

Return to data mode

Retrain and return to data mode

Rate re-negotiation and return to data mode

P Select

pulse

dialing

Enables result code

Disables result code

Select S-register n; refer to S-register summary for the details

AT Command prefix