ADTRAN Express 3000 SP User Manual page 76

Appendix A. AT Commands and S-Registers
Entering Text into the Command Line
All command lines must begin with the AT character set in either all
uppercase or all lowercase letters. After the AT attention code, the
command line may contain a single command or a series of com-
mands; however, AT commands _L1 and _L0 must be entered on a
separate line and followed by Enter. When entering a series of com-
mands, you may separate the individual commands with spaces for
readability. The maximum length for a command line is 40 characters.
After receiving a terminating character, the Express 3000 SP executes
each command line. The default terminating character is a carriage re-
turn (ASCII 013), but it can be changed by writing a different value to
register S3. Before transmitting the terminating character, you can edit
the command line by using the backspace character (ASCII 008) to
erase errors so the proper commands can be entered.
To return an active call to the on-line state, enter ATO.
Entering AT Commands
To enter an AT command, type AT followed by the command; then,
press the Enter key (the AT Commands list begins on page A-4). For
example, ATI1 returns the software version of the Express 3000 SP
unit.
S-REGISTERS
You can change or view the Express 3000 SP configuration using the
S-registers (the S-registers list begins on page A-9).
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