Multi-Tech Systems MT5634ZLX - Manual (Page 43)

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Chapter 3 - AT Commands, S-Registers, and Result Codes
MT5634ZLX/E
Upstream data rates
Upstream V.90 data rates are 4800 to 33,600 bps in 2400 bps
increments.
S48= 7, 128 S48 sets the LAPM error control and feature negotiation:
S48=7 Negotiation enabled
S48=128 Negotiation disabled. Force
immediate fallback options
specified in S36
S36=0 or 2, and S48=7 LAPM or hang up
S36=0 or 2 and S48= 128 Do not use
S36=1 or 3, and S48=7 LAPM or async
S36=1 or 3, and S48=128 Async
S36=4 or 6, and S48=7 LAPM, MNP or hang up
S36=4 or 6, and S48=128 MNP or hang up
S36=5 or 7, and S48=7 LAPM, MNP or async
S36=5 or 7, and S48=128 MNP or hang up
S89= 0, 5 - 60 030 S89 sets the Sleep Mode control timer. Specify the number of
seconds of inactivity (no character sent from DTE, no RING) in the
off-line command state before the modem places itself into standby
mode. A value of “0” prevents standby mode. If a number between 1
and 4 is entered for this register, it will set the value to 5.
S109 0--2 1 Sets one of three 56K operating modes:
K56flex mode, V.90 mode, or Auto-mode. S109=2 forces V.90
connections for testing purposes, etc. S109 sets the 56K operating
mode as shown below:
0 = V.90 disabled
1 = K56flex or V.90 (Dual mode enabled)
2 = V.90 only (K56flex disabled).