Multi-Tech Systems MT5634SMI V.92, MT5634SMI V.34 manual S48=7 S48=128, S89, S108

Chapter 1 – AT Commands, S-Registers and Result Codes

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, or hang up	MNP or hang up
				S36=5, 7		LAPM, MNP, or async	MNP 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

Multi-Tech Systems, Inc. SocketModem MT5634SMIxx Reference Guide (S000263C) 30