Acer extensa-7x0
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MTC Data/FAX
Advanced Data Addendum
AT Command Set
December 4, 1996
22
Lucent Technologies Inc.
AT Commands Reference S-Registers
(continued)
S48
LAPM Error Control and Feature Negotiation (default 7)
S48 = 7
Negotiation enabled.
S 48 = 128 Negotiation disabled; forces immediate fallback options specified in S36.
The following chart lists the S36 and S48 configuration settings necessary to negotiate certain types of
connections.
connections.
S48=7
S48 =128
S36 = 0, 2
LAPM or hangup
do not use
S36 = 1, 3
LAPM or async
async
S36 = 4, 6
LPAM,
MNP, or hangup
MNP or hangup
S36 = 5, 7
LAPM,
MNP, or async
MNP or async
S89
Timer to Control Sleep Mode
This command displays the number of seconds of inactivity (no characters sent from the DTE, no RING) in the off-
line command state before the modem places itself into standby mode. A value of zero prevents standby mode.
line command state before the modem places itself into standby mode. A value of zero prevents standby mode.
Note: If a number between 1 and 4 is entered for this register, it will set the value to 5, and the inactivity before
standby will be 5 seconds. This is done for compatibility with previous products which allowed time-outs
down to 1 s.
standby will be 5 seconds. This is done for compatibility with previous products which allowed time-outs
down to 1 s.
Range:
0, 5—255
Default:
10
S90
Local Phone Status
This register tells the status of the Local Phone. It is read only.
0 = local phone on-hook
1 = local phone off-hook
S91
Line Transmit Level
This register is effective only for Japan. It specifies the line transmit level in dB with an implied minus sign.
Range:
6—15
Default:
15
Units:
1 dB