S Registers - IBM Aptiva Series Handbook

S registers

S registers are information storage areas inside the modem. The AT command set uses the S registers to configure modem
options. Some S registers have default settings. For normal modem operations, the default settings are usually adequate.
However, special circumstances may require you to change some defaults. To change or read the value of an S register, begin
the command with the letters
To read the value of an S register:
Use the r command (r=register number 0-28).
ATS ?
For example, to read the value of S register 0, type
To change the value of an S register:
Use the r n command (r=register number 0-28, n=the new value you want to assign).
ATS =
For example, to change the value of S register 0 to 20 rings, type
The following table lists the S Registers summary.
Table 14: S registers
Register Function
Auto-answer ring
Ring counter
Escape code character
Carriage return character
Line feed character
Backspace character
Dial tone wait time
B-14 Appendix B: Modem information
.
AT
and press .
ATS0? Enter
and press
ATS0=20
Range/units
0-255 /rings
0-255 /rings
0-127 /ASCII
0-127 /ASCII
0-127 /ASCII
0-127 /ASCII
2-65 /seconds
.
Enter
Default
0
0
43
13
10
8
2