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Reference Guide for the Model XM128 ISDN Digital Modem
D-4 Status Registers and Result Codes
S-Register Descriptions
In most bitmapped S-registers, the default bit value is 0 (which is the normal situation) and only
the nondefault situation is described. Some reserved bits are for factory use, and the user should
not change them. Table D-3 describes each basic S-register. Values followed by an asterisk (*) are
the factory default settings.
Table D-3. Basic S-registers ATSn=x
Command Function and description Default
S0= Sets the number of rings on which the Model
XM128 modem answers; 0 value disables
auto-answer.
000
S1= Counts and stores number of rings from an
incoming call.
000
S2= Defines escape code character, default [+]
(43 dec.).
043
S3= Defines ASCII carriage return. 013
S4= Defines ASCII line feed. 010
S5= Defines ASCII backspace. 008
S7= Sets duration, in number of seconds, that the
Model XM128 modem waits for a carrier.
060
S8= Sets duration, in seconds, for the pause and
repeat commands. For more information, refer
to Table C-1 on page C-2.
002