48
3.S-REGISTERS
The S-Registers are summarized in the table below along with their default values; registers may be
stored in one of the two user profiles by entering the &Wn command.
Register designations can be easily changed by modifying the modem sources.
The appropriate AT command which controls the relevant bits in the S-Register should be used to change
the value.
3.1.DEFAULT VALUES
The "factory" default values are coded into the modem tables and set into the active configuration at
initialization or by the ATZn command. The designated default profile is subsequently loaded, and may
change some of the factory default values. The designated default profile can be changed by entering the
&Yn command where n is one of the two possible user profiles.
The default values may be loaded at any time by entering the &Fn command.
Table 4-1. S-Register Summary
Register
Function
Range
Units
Default
S0
Rings to Auto-Answer
0-255
rings
0
S1
Ring Counter
0-255
rings
0
S2
Escape Character
0-255
-
43 (+)
S3
Carriage Return Character
0-127
-
13 CR
S4
Line Feed Character
0-127
-
10 LF
S5
Backspace Character
0-255
-
8 BS
S6
Wait Time for Dial Tone
2-255
s
2
S7
Wait Time for Carrier
1-255
s
50
S8
Pause Time for Dial Delay Modifier
0-255
s
2
S11
DTMF Tone Duration
50-255
ms
95
S12
Escape Guard Time
0-255
0.02 s
50
S36
LAPM Failure Control
0-7
-
7
S37
Line Connection Speed
0-18
-
0
S38
Delay Before Forced Hangup
0-255
s
1
S83
LAPM Detection Timeout
1-30
s
10
3.2.
S-REGISTER DEFINITIONS
S0 - Number of Rings to Auto-Answer
Sets the number of the rings required before the modem automatically answers a call. Setting this
register to zero disables auto-answer mode.
Range:
0-255 rings
Default:
0
S1 - Ring Counter
S1 is incremented each time the modem detects a ring signal on the telephone line. S1 is cleared if
no rings occur over an eight second interval.
Range:
0-255 rings
Default:
0
