Owner`s manual

PN 88300150
4/3/01 19
3.4 AT Commands
A variety of autodial operations and modem options are controlled when the MT2834MR is in Command
Mode. This chapter covers each command in detail. There are also several option configurations stored
in “S-Registers”, which can also be accessed in Command Mode (refer to Chapter 6). Error Correction
commands are covered in Chapter 5 of this manual.
The MT2834MR commands are listed below in alphabetical order.
Modem Configuration - Command Letters
AT ATtention code that precedes most commands
A Answer mode
A/ Repeat Last Command
A: Continuous redial until call answered*
&A Answerback (proprietary feature)
$An Auto-Reliable Buffering
#An Auto Speed Select
$AS IBM AS/400 Support
Bn Bell or ITU-T answer tone select
&Bn Transmit Buffer size
&BSn Maximum TX Block Size
$BAn Baud Adjust
&Cn Carrier Detect control
*C Caller ID Detection (optional)
Ds Dial
DsDn Store Telephone Number
&Dn DTR Control
$Dn DTR Dialing
En Echo Commands
$En Enable/Disable Error Correction
%En Escape Method
$EBn Asynchronous Word Length
&En Mode [normal, auto-reliable, or reliable]
&En Flow control [None, CTS, or Xon/Xoff]
&En Pass through XON/XOFF
&En Enq/Ack pacing
&En Normal mode flow control
&En Pacing
&En Data compression disable/enable
$F Enable/Disable Auto-Reliable Fallback Character
#F Fallback modes when on-line
&F Fetch Factory default values
$Fn Enable/Disable Fallback character
#Gn Guard tones*
HHook on/off control, or Hang up
$H Help screens
*H Busy out after disconnect
I Identify modem model/revision
#L V.42 mode select (LAP-M/MNP)
L List stored telephone numbers
L5 List current configuration parameters
L6 List current S-Register Values
L7 List additional configuration parameters
L8 List On-Line Diagnostics
&Ln Lease line commands
$MI MI/MIC Control*
Mn Sync/Async control