Intel LAN+Modem56 PC Card PRO/100 - Manual (Page 155)

Modem Reference 6-31
S46 Data Compression Selection
The setting of this register is used to turn data compression on or
off. It is set by AT%Cn.
Data compression can only be enabled when the modem is operat-
ing in an error-control (EC) mode using either V.42 LAP-M or
MNP protocols.
S46=0 Modem will not attempt negotiation for data compres-
sion
S46=2 Modem will negotiate with a remote modem for data
compression (default).
S46=136 Same as S46=0
S46=138 Same as S46=2
S48 LAPM Error Control and Feature Nego-
tiation
S48=7 Negotiation enabled
S48=128 Negotiation disabled; forces immediate fallback options
specified in S36.
The following table shows the S36 and S48 configuration settings needed
to negotiate certain types of connections.
S48=7 S48=128
S36=0,2 LAPM or hangup do not use
S36=1,3 LAPM or buffered buffered
S36=4,6 LAPM, MNP, or hangup MNP or hangup
S36=5,7 LAPM, MNP, or buffered MNP or buffered
S89 Timer to Control Sleep Mode
This register displays the number of seconds of inactivity (no
characters sent from DTE, no RING) in the off-line command state
before the modem places itself into standby mode. A value of zero
prevents standby mode. Default is 30. Range is 0 and 5 - 65.