Contents (continued)
x V.3600
Chapter 5. AT Commands
Command Categories ........................................................................... 5-1
Operation Modes .................................................................................. 5-1
Offline Command Mode.................................................................. 5-2
Online Command Mode .................................................................. 5-2
Data Mode........................................................................................ 5-2
Sending Commands to the Modem ...................................................... 5-2
Creating a Command Statement — AT ........................................... 5-3
Autobaud ......................................................................................... 5-3
Guidelines for Creating Command Statements ............................... 5-3
Monitor Display .............................................................................. 5-4
Command Statement Buffer ............................................................ 5-4
Backspace Key ................................................................................ 5-4
Repeating a Command — A/ .......................................................... 5-4
Numbered Commands ..................................................................... 5-5
Group Commands ........................................................................... 5-5
Response Commands............................................................................. 5-5
Digit / Word Selection — V ............................................................ 5-6
Response Displays — Q ................................................................. 5-6
Negotiation Displays — W ............................................................. 5-6
Connect Message Codes — \V ....................................................... 5-6
Call Progress / Connect Speed Messages X .................................... 5-7
Number Code Application — *RC.................................................. 5-8
Response Number Codes / Messages............................................... 5-9
Dial Commands .................................................................................... 5-13
Dialing — D .................................................................................... 5-13
Tone Dialing — T ........................................................................... 5-14
Pulse Dialing — P ........................................................................... 5-14
Insert Long Pause — , ..................................................................... 5-14
Wait for Second Dial Tone — W .................................................... 5-15
Hook Flash — ! ............................................................................... 5-15
Switching to Answer Mode after Dialing — R ............................... 5-15
Remaining in Command Mode — ; ................................................ 5-15
Wait for 5 Seconds of Silence — @ ............................................... 5-16
Dialing a Stored Telephone Number — Sn...................................... 5-16
Autodial Number Location — *AUn .............................................. 5-16
Voice Calls ...................................................................................... 5-16
Switching from Voice to Data ......................................................... 5-17
Answering A Call ................................................................................. 5-17
Manual Answer ............................................................................... 5-17
AT Command Answer — A ............................................................ 5-17
Autoanswer — S0 ........................................................................... 5-17
Caller ID — *ID .............................................................................. 5-17
Distinctive Ring — *DR ................................................................. 5-18
Terminal Interface Commands ............................................................. 5-19
Data Carrier Detect — &C............................................................... 5-19
Data Set Ready — &S...................................................................... 5-20
Data Terminal Ready — &D ........................................................... 5-20
Serial Port Ring Indicator (Pin 22) — \R ........................................ 5-21
Request to Send / Clear to Send — &R .......................................... 5-21
DTE Controlled Fallback Rate (Pin 23) — *FB ............................. 5-22
General Commands............................................................................... 5-22
Changing from Data Mode to Command Mode — +++.................. 5-22
