Multitech MultiModem ZPX MT5634ZPX-PCI Series, Owner'S Manual

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3 AT Commands, Result Codes, and S-Registers
MT5634ZPX-PCI 47
Register Unit Range Default Description
S38 decimal 0–14 1 Sets maximum 56K downstream
speed that the modem attempts to
connect. Where K56flex provided
rates of 32,000 to 56,000 in 2,000 bps
increments. V.90 provides rates of
28,000 to 56,000 bps in increments of
1,333 bps.
0 =V.90/56Kflex disabled
1 = V.90/56Kflex enabled with auto-
matic speed selection maximum
negotiated modem speed enabled
2 = 29,333
3 = 30,666
4 = 32,000
5 = 33,333
6 = 34,666
7 = 36,000
8 = 37,333
9 = 38,666
10 = 40,000
11 = 41,333
12 = 42,666
13 = 44,000
14 = 45,333
15 = 46,666
16 = 48,000
17 = 49,333
18 = 50,666
19 = 52,000
20 = 53,333
21 = 54,666
22 = 56,000
S42 decimal 0–1 1 Enables/disables the 56K auto rate.
Retrain and fallback are disabled in
data mode.
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.