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AT Command Set and S-Registers
14-153810-A2-GB30-30 September 1998
S-Register List
S-registers affect the operating parameters of the
3800 Series modems. S-registers are only applicable when
the DTE Dialer Type configuration option is set for AT.
(See &Mn command.)
Table 14-2 lists all S-registers supported by the
3800 Series modems. The first column lists the S-register.
The second column lists all possible values for that
register. The third column lists the key sequence used to
enter the equivalent from the front panel. Use this column
to reference commands in Chapter 9 if further description
is necessary.
S-Register Format
S-registers can be displayed and/or modified when the
modem is in Command mode. To display the value of an
S-register, issue the following command:
TYPE: ATS n?
Where: n is the register number
PRESS: Enter
To modify the value of an S-register, issue the
following command:
TYPE: ATS n=r
Where: n is the register number, and r is the new
value
PRESS: Enter
In Table 14-2, the value for n is listed in the S-register
column, and the value for r is listed in the Description
column.
Table 14-2
(1 of 12)
3800 Series S-Registers
S-Register
Description Front Panel Branch
S0 Auto-Answer Ring Number
Register determines number of rings the modem will count before
automatically answering a call.
Enter zero (0) if you do not want the modem to automatically answer any
calls. Otherwise, enter a value from 1 to 255 for the number of rings to
count before answering.
Factory setting is 1.
Configure\Edit\Line Dialer
S2 AT Escape Character
Register determines ASCII value used for escape sequence to enter
Command mode from Data mode.
Enter a value from 1 to 127 for the escape character. Any value greater
than 127 causes the modem to disable the escape sequence. When the
escape sequence is disabled, the modem cannot return to Command
mode until the call is disconnected.
Factory setting is 43 (+ key).
Configure\Edit\DTE Dialer
S3 Carriage Return Character
Register determines ASCII value used as the carriage return (Return
key). This character is used to end command lines and result codes.
Enter a value from 0 to 127 for the command end character.
Factory setting is 13 (carriage return key).
NOTE: The &W command used to save this change must be on a
separate line. This ensures both that the change is intentional,
and that the DTE can enter the new character.
Configure\Edit\DTE Dialer