2400 BPS Faxmodem  (250-3532)     S Registers          Faxback Doc. # 4894

Your modem has 28 memory locations, or registers. These registers control 
many aspects of your modem's operation. You usually do not have to worry 
about setting any register; the default values work for most applications.

The following chart summarizes your modems registers.
┌─────────┬──────────┬────────────┬──────────┬─────────────────────────────┐
│Register │Range     │ Unit       │Default   │Description                  │
├─────────┼──────────┼────────────┼──────────┼─────────────────────────────┤
│  S0     │0-255     │ rings      │    0     │Ring to answer on.           │
│  S1     │0-255     │ rings      │    0     │Number of rings passed.      │
│  S2     │0-127     │ ASCII      │   43     │Escape code character.       │
│  S3     │0-127     │ ASCII      │   13     │Command terminator.          │
│  S4     │0-127     │ ASCII      │   10     │Line feed character.         │
│  S5     │0-32,127  │ ASCII      │    8     │Back space character.        │
├─────────┼──────────┼────────────┼──────────┼─────────────────────────────┤
│  S6     │2-255     │ seconds    │    2     │Wait time for dial tone.     │
│  S7     │0-255     │ seconds    │   30     │Wait time for carrier.       │
│  S8     │0-255     │ seconds    │    2     │Pause time for carrier.      │
│  S9     │1-255     │ 1/10 sec.  │    6     │Carrier detect response time.│
│  S10    │0-255     │ 1/10 sec.  │   14     │Carrier loss hang up delay.  │
├─────────┼──────────┼────────────┼──────────┼─────────────────────────────┤
│  S11    │0-255     │ 1/100 sec. │   75     │Touch-tone timing.           │
│  S12    │0-255     │ 1/50 sec.  │   50     │Escape code timing.          │
│  S13    │          │ Not used.  │          │                             │
│  S14    │          │ Bit Mapped │          │Option Register.             │
│  S15    │          │ Not used.  │          │                             │
├─────────┼──────────┼────────────┼──────────┼─────────────────────────────┤
│  S16    │          │ Bit Mapped.│          │Option Register.             │
│  S17    │          │ Not used.  │          │                             │
│  S18    │0-255     │ seconds    │    0     │Test duration                │
│  S19    │          │ Not used.  │          │                             │
│  S20    │          │ Not used.  │          │                             │
├─────────┼──────────┼────────────┼──────────┼─────────────────────────────┤
│  S21    │          │ Bit mapped.│          │Option register.             │
│  S22    │          │ Bit mapped.│          │Option register.             │
│  S23    │          │ Bit mapped.│          │Option register.             │
│  S24    │          │ Not used.  │          │                             │
│  S25    │0-255     │ seconds    │    5     │Async DTR Delay              │
├─────────┼──────────┼────────────┼──────────┼─────────────────────────────┤
│  S26    │0-255     │ seconds    │    1     │RTS to CTS Delay             │
│  S27    │          │ Bit mapped.│          │Option register.             │
└─────────┴──────────┴────────────┴──────────┴─────────────────────────────┘
Viewing Registers:

To view the contents of a register, in the command mode type:

AT Sr? <ENTER>  (Where r is the register number).

Your modem returns:

nn           Where nn is the current setting of the register.

OK

You can view the contents of several registers with one command:

AT Sr? Sr? Sr?

Your modem returns:

nn          First register.
nn          Second register.
nn          Third register.

OK

Setting Registers:

To change the contents of a register, in the command mode type:

AT Sr=n ENTER         Where r is the register number and n is the new value.

Your modem returns:   OK

(dtc-07/28/93)