At Commands Reference S-Registers - Lucent Technologies Host-Based Controller Modem AT Data Addendum

Host-Based Controller Modem
AT Command Set

AT Commands Reference S-Registers

S-registers generally affect how the AT commands perform. Contents of the registers can be displayed or
modified when the modem is in command mode.
To display the value of an S-register:
TYPE:
PRESS:
To modify the value of an S-register:
TYPE:
where n is the register number, and r is the new register value.
PRESS:
S0 Auto Answer Ring Number
This register determines the number of rings the modem will count before automatically answering a call. Enter 0
(zero) if you do not want the modem to automatically answer at all. When disabled, the modem can only answer
with an ATA command.
Range:
Default:
Units:
S1 Ring Counter
This register, Ring Counter, is read only. The value of S1 is incremented with each ring. If no rings occur over a
six second interval, this register is cleared.
Range:
Default:
Units:
S2 AT Escape Character (user defined)
This register determines the ASCII valued used for an escape sequence. The default is the + character. The
escape sequence allows the modem to exit data mode and enter command mode when on-line. Values greater
than 127 disable the escape sequence.
Range:
Default:
Units:
S3 Command Line Termination Character (user defined)
This register determines the ASCII values as the carriage return character. This character is used to end
command lines and result codes.
Range:
Default:
Units:
Note: This register value is not stored with &W command.
29
ATSn? where n is the register number.
Enter
ATSn = r
Enter
0—255
0
rings
0—255
0
rings
0—255
43
ASCII
0—127, ASCII decimal
13 (carriage return)
ASCII
Version 1.0
Data Addendum
June 15, 1998
Lucent Technologies Inc.