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MT5634/MT9234 Modem; AT Command Set
Register Unit Range Default Description
S37 decimal 0–19 0 Sets the maximum V.34 "upstream" speed at which
the modem attempts to connect.
0 = maximum speed
1 = reserved
2 = 1200/75 bps
3 = 300 bps
4 = reserved
5 = 1200 bps
6 = 2400 bps
7 = 4800 bps
8 = 7200 bps
9 = 9600 bps
10 = 12000 bps
11 = 14400 bps
12 = 16800 bps
13 = 19200 bps
14 = 21600 bps
15 = 24000 bps
16 = 26400 bps
17 = 28800 bps
18 = 31200 bps
19 = 33600 bps
S38 decimal 0–23 1 Sets "downstream" data rate where V.90 provides
rates of 28,000 to 56,000 bps in increments of
1,333 bps.
0 = V.90 disabled
1 = V.90 auto rate
2 = 28,000 bps
3 = 29,333 bps
4 = 30,666 bps
5 = 32,000 bps
6 = 33,333 bps
7 = 34,666 bps
8 = 36,000 bps
9 = 37,333 bps
10 = 38,666 bps
11 = 40,000 bps
12 = 41,333 bps
13 = 42,666 bps
14 = 44,000 bps
15 = 45,333 bps
16 = 46,666 bps
17 = 48,000 bps
18 = 49,333 bps
19 = 50,666 bps
20 = 52,000 bps
21 = 53,333 bps
22 = 54,666 bps
23 = 56,000 bps
Upstream data rates: Upstream V.90 data rates are
4800 to 33,600 bps in 2400 bps increments.
S43 decimal 0–1 1 For testing and debugging only. Enables/disables
V.32bis start-up auto mode operation. 0 = disable;
1 = enable.