34
MT5634ZBA-USB User Guide
Register Unit Range Default Description
S42 decimal 0–1 1 Enables/disables the 56K auto rate. When
56K auto is disabled, fallback to V.34 is also
disabled. 0 = disable; 1 = enable.
S43 decimal 0–1 1 For testing and debugging only. Enables/
disables V.32bis start-up auto mode operation.
0 = disable; 1 = enable.
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
LAPM or async Async
LAPM or hangup Do not use
LAPM, MNP, or aysnc
LAPM, MNP, or hangup MNP or hangup
MNP or async
S36=0, 2
S36=1, 3
S36=4, 6
S36=5, 7
S89 seconds 0, 5–255 10 Sets the length of time in the off-line command
mode before the modem goes into standby
mode. A value of zero prevents standby mode;
a value of 1–4 sets the value to 5.
S109 decimal 0, 1 or 2 1 Selects one of three 56K operating modes.
0 V.90 disabled
1 K56flex or V.90 (dual-mode
enabled)
2 V.90 only (K56flex diabled)
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