Section Four - AT Command Set
4.1 Executing Commands
Your modem is in Command Mode upon
4.2 AT Commands & 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.
All default settings are printed in bold text.
CommandFunction
A | Answer incoming call | |
A/ | Repeat last command. Do not precede A/ with AT or follow with ENTER | |
B0 | CCITT mode @ 1200 bps | |
B1 | Bell mode @ 300/1200 bps | |
Dn | 0 - 9, | |
| L | last number redial |
| P | pulse dial |
| T | tone dial |
| W | wait for second dial tone |
| , | pause |
| @ | wait for five seconds of silence |
| ! | flash |
| ; | return to Command Mode after dialing |
| $ | wait for AT&T "bong" tone |
E0 | Echo disabled | |
E1 | Echo enabled |
+++switch from Data mode to Command Mode
H0 Modem goes
H1 Modem goes
I0 Returns default speed and controller firmware version
I1 ROM Check sum code
I2 ROM test
I3 Returns default speed and controller firmware version