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4-3
S-Registers
Register Unit Range Default Description
S48 decimal 7 or 128 7 Enables (7) or disables (128) LAPM negotiation.
The following table lists the S36 and S48
configuration settings for certain types of connections.
S48=7 S48=128
S36=0, 2 LAPM or hang up Do not use
S36=1, 3 LAPM or async Async
S36=4, 6 LAPM, MNP, MNP or hang up
or hang up
S36=5, 7 LAPM, MNP, MNP or async
or async
S89 seconds 0, 5–255 10 Sets the length of time in the off-line command mode
before the modem goes into standby mode or
"sleep mode". A value of zero prevents standby
mode; a value of 1–4 sets the value to 5. Standby
mode (sleep mode or low power mode) is controlled
by S89. It programs the number of seconds of
inactivity before the modem will go to sleep. The
default value is 0. A value of 0 disables standby
mode. The modem will wake on an incoming ring
or an AT command.
S108 decimal 0–3, 6, 7 6 Selects the 56K digital loss if using the modem
through a PBX line. The default value is -6 dB loss,
the value used when calling from a typical POTS
line long distance.
0 = -0 dB digital loss, no robbed-bit signaling
1 = -3 dB PBX digital loss
2 = -2 dB digital loss
3 = -3 dB digital loss
6 = -6 dB digital loss
7 = -0 dB digital loss with robbed-bit signaling