Table B.4. S Registers
Register | Range | Default | Function |
---|---|---|---|
S0 | 0-255 rings | 1-2 | Answer on ring number. Don't answer if 0 |
S1 | 0-255 rings | 0 | if S0 is greater than
0 this register counts the incoming
rings. |
S2 | 0-127 ASCII | 43 + | Escape to command mode character |
S2 | >127 | no ESC | |
S3 | 0-127 ASCII | 13 CR | Carriage return character |
S4 | 0-127 ASCII | 10 LF | Line feed character |
S5 | 0-32, 127 ASCII | 8 BS | Backspace character |
S6 | 2-255 seconds | 2 | Dial tone wait time (blind dialing, see Xn |
S7 | 1-255 seconds | 30-60 | Wait time for remote carrier |
S8 | 0-255 seconds | 2 | Comma pause time used in dialing |
S9 | 1-255 1/10ths second | 6 | Carrier detect time required for recognition |
S10 | 1-255 1/10ths second | 7-14 | Time between loss of carrier and hangup |
S11 | 50-255 milliseconds | 70-95 | Duration and spacing of tones when tone dialing |
S12 | 0-255 1/50th seconds | 50 | Guard time for pause around +++ command sequence |
S36 | Fallback options when error correction link fails:
| 7 | Negotiation Failure Treatment |
S37 |
| 0 | Negotiation Speed (Initial handshake) |
Many modems have dozens, even hundreds, of S registers, but only the first
dozen or so are fairly standard. They are changed with a command like
ATSn
=N
,
and examined with ATSn
? (e.g.
AT S10
would tell the modem not to hang up for seven
seconds should it not hear the answering modem, and return the number of times
the phone last rang.)=70
S1?
Would you like to make a comment or contribute an update to this page?
Send feedback to the KDE Docs Team