User's Manual

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2.3 S Registers Definitions
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: ATSn?, where n is the register number.
PRESS: Enter To modify the value of an S register:
TYPE: ATSn = r where n is the register number, and r is the new register value.
PRESS: Enter
S0 Auto Answer Ring Number
This register determines the number of rings the modem will count before
automatically answering a call. 0 (zero) is that asks modem don?t do automatically
answer at all. When disabled, the modem can only answer with an ATA command.
Range: 0-55
Default: 0
Units: rings
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 6 second interval, this register is cleared.
Range: 0-55
Default: 0
Units: rings
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. Values greater than 127 disable the escape sequence.
Range: 0-255
Default: 43
Units: ASCII
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: 0-127, ASCII decimal
Default: 13 (carriage return)
Units: ASCII