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At commands reference s-registers – Lucent Technologies Host-Based Controller Modem AT User Manual

Page 29

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Host-Based Controller Modem

Data Addendum

AT Command Set

June 15, 1998

29

Version 1.0

Lucent Technologies Inc.

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:

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. 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:

0—255

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
six second interval, this register is cleared.

Range:

0—255

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 when on-line. 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

Note:

This register value is not stored with &W command.