0049-1800-xxx 326X V.34, V.34-SDC and V.32bis Series Modem – USER’S GUIDE 02/23/2010
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3.
End with a carriage return <CR>/
The exceptions to the above AT command line conventions are “A/” (repeat last command) and “+++”
(the escape sequence). Responses (result codes) to AT commands always appear in upper-case.
To enter multiple AT commands on a single command line:
Multiple AT commands can be entered on a command line using a single AT prefix. The modem
accepts up to 60 characters after the prefix. Spaces are not counted in the length. AT commands are
interpreted in sequence in the command line until one of the following occurs:
•
A <CR> is encountered
•
An invalid command is encountered
•
A command is encountered which causes the modem to reset, go off-hook, or enter a test
state
For example, you might enter:
on a single command line. This command disables Asynchronous Echo. It configures the Result Code
Format to Verbose, and the Save Changes feature to Option Set 1. (These options and settings are
described fully in Appendix A.)
Commands that are followed by a telephone number must be at the end of the line. However, if the
semicolon dial modifier (;) follows a telephone number, the modem returns to command mode after
dialing. Therefore, AT commands can be entered after a semicolon in a command string.
NOTE:
If
an error occurs, AT commands prior to the error are executed; commands following the error are
ignored.
If you enter an AT command that requires a postscript number and no number is entered, the modem
defaults to a 0 setting.
AT Command String Examples
Table 5-1 provides AT command string examples and their ACU results.
