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Data Addendum Host-Based Controller Modem
June 15, 1998 AT Command Set
AT Commands Reference S-Registers (continued)
Version 1.0 Lucent Technologies Inc.
35
S43 Auto Mode (default 1, range 01)
This command is used for testing and debugging only.
V.32bis startup auto mode operation disabled.
0 = auto mode disabled, 1 = enabled.
Range: 0—1
Default: 1
S48 LAPM Error Control and Feature Negotiation (default 7)
S48 = 7 Negotiation enabled
S48 = 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:
S48 = 7 S48 = 128
S36 = 0, 2 LAPM or hangup do not use
S36 = 1, 3 LAPM or async async
S36 = 4, 6 LAPM, 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.
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.
Range: 0, 5—65
Default: 10
S90 Read-only Local Phone
This register tells the status of the Local Phone. It is read-only.
0 = on-hook
1 = off-hook
S91 Line Transmit Level
This register is effective only for Japan. It specifies the line transmit level in dBm with an implied minus sign.
Range: 6—15
Default: 15
Units: 1 dB
S108 Network Codec Type
S108=22 µ-Law
S108=33 A-law
S108=7 default, or any other value: Coding as specified by digital modem in V.8bis information. If an old server
does not tell its code type in V.8bis, then the client modem chooses based on its country ID. µ-law regions are
Japan, Taiwan, Korea, Hong Kong, North America, and Latin America. Everywhere else is A-law. (This S –
Register is valid only in K56flex mode.)