Multi-Tech Systems MultiModem USB MT5634ZBA-USB - Manual (Page 33)

33
Chapter 3 - AT Commands, S-Registers and Result Codes
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 modem 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 0–14 1 Sets the maximum 56K “downstream” speed
at which the modem attempts to connect. The
default maximum speed is 56K bps.
0 = 56K disabled
1 = 56K enabled*
2 = 32000 bps
3 = 34000 bps
4 = 36000 bps
5 = 38000 bps
6 = 40000 bps
7 = 42000 bps
8 = 44000 bps
9 = 46000 bps
10 = 48000 bps
11 = 50000 bps
12 = 52000 bps
13 = 54000 bps
14 = 56000 bps
* with automatic speed selection at maximum
modem speed
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.