S-Register Descriptions - Compaq 244100-005 - Deskpro 2000 - 16 MB RAM White Paper

Compaq V.90 Integrated Modem Commands

S-Register Descriptions

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:
Default:
Units:
S1 Ring Counter
This register 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:
Default:
Units:
S2 AT Escape Character (user defined)
This register determines the ASCII value 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 online. Values greater than 127 disable the escape sequence.
Range:
Default:
Units:
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:
Default:
Units:
S4 Response Formatting Character (user defined)
This register determines the ASCII value used as the line feed character. The modem uses a line
feed character in command mode when it responds to the computer.
Range:
Default:
Units:
ECG021/1298
0-255
0
rings
0-255
0
rings
0-255
43
ASCII
0-127, ASCII decimal
13 (carriage return)
ASCII
0-127, ASCII decimal
10 (line feed)
ASCII
31