User's Manual

Bit 4,5 Parity
0 Even
1 Reserved
2 Odd
3 No parity
Bit 6,7 Guard Tone (country depended)
0 No Guard Tone (&G0) (factory setting)
1 No Guard Tone 550 Hz (&G1)
1 Guard Tone 1800 Hz (&G2)
S25 – DTR Delay Time
Period of time between the departure of DTR and “hanging up”. In
synchronous operational mode, the measurement units are seconds, while in
other operational modes they are hundredths of seconds.
Range: 0-255 sec (1/100 sec); factory setting: 5
S27 – General Options
Factory setting : 64 (40h) (01000000b); Read only register
Bit 0–5 Reserved
Bit 6 CCITT/Bell Mode (B) (only at 300 and 1200 bps)
0 CCITT (B0)
1 Bell (B1) (factory setting)
Bit 7 Reserved
S30 – Inactivity Timer
This determines when the modem goes off-line, when no data are being sent
or received. If no Error Correction procedure is active, this Register is reset
only by transmitted data. With other procedures, the Register is reset by any
data which are recognized. The timer works only in asynchronous mode.
Range: 0-90 sec; factory setting: 0
S-REGISTERS 4-7