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AT Commands and S-Registers
Table 4-2
(5 of 10)
3825Plus S-Registers
S44  Leased-Line Rate
Determines the modem’s highest data rate and modulation scheme for operation on 2-wire leased lines in either Answer
or Originate mode.
Register has the following values (shown in bps):
1 = 14,400 (V.32bis)
2 = 12,000 (V.32bis)
3 = 9600 (V.32bis)
4 = 7200 (V.32bis)
5 = 4800 (V.32bis)
6 = 2400 (V.22bis)
18 = 19,200 (V.32terbo)
19 = 16,800 (V.32terbo)
25 = 33,600 (V.34)
26 = 31,200 (V.34)
27 = 28,800 (V.34)
28 = 26,400 (V.34)
29 = 24,000 (V.34)
30 = 21,600 (V.34)
31 = 19,200 (V.34)
32 = 16,800 (V.34)
33 = 14,400 (V.34)
34 = 12,000 (V.34)
35 = 9600 (V.34)
36 = 7200 (V.34)
37 = 4800 (V.34)
38 = 2400 (V.34)
NOTE: Turn your modem off and on after setting S44 for the setting to take effect.
The factory setting is 33,600 (V.34).
S45 – Leased Line Transmit Level
Level determines the modem’s transmit power output level over leased lines.
Enter a value from 0 –15 dBm.
The factory setting is 0 dBm.
NOTE: The default and permitted settings of this option are country-dependent. See Appendix F.
S48  Leased Line Carrier On Level
Determines if the modem disconnects if the carrier signal on leased lines falls below –26 dBm or – 43 dBm.
Register has the following values:
0 = – 43 dBm
1 = –26 dBm
2 = –33 dBm
The factory setting is – 43 dBm.
NOTE: The default and permitted settings of this option are country-dependent. See Appendix F.
3825-A2-GB30-40
January 1999
4-21