Paradyne COMSPHERE 3920PLUS Technical Reference Manual page 135

COMSPHERE 392xPlus Modems
LeasedLine Rate: 33600(V34) (Cont.)
NOTE: The modem must be in DirectMode before the modulation scheme can be changed from V.32bis, V.34 family, or
TMp to another leased-line modulation (V.33, V.29, or V.22bis). See Err Contrl Mode configuration option for
more about DirectMode. On leased lines, V.42 error control and BufferMode are only supported by V.32bis, V.34
family, or TMp. An error occurs if the modem is not in DirectMode when the modulation is changed from V.32bis,
V.34 family, or TMp.
The AT command is S-Register S44 = n, where n is:
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)
11 = 14,400 (V.33)
12 = 12,000 (V.33)
13 = 9600 (V.29)
Leased Mode: 4WLL-Ans
Nxt 4WLL-Ans 4WLL-Orig 2WLL-Orig 2WLL-Ans
Leased Mode. Sets the modem for either 2-wire or 4-wire operation in Answer mode (receiving a call) or 2-wire or 4-wire
operation in Originate (initiating a call) mode.
NOTE: For proper operation of V.32 modulations over leased lines, one modem must be set to Originate mode and the
other set to Answer mode.
For Sync Leased Answer Mode, Async Leased Answer Mode and Trellis Multipoint Tributary Mode, 4-wire Answer is the
factory default.
For Sync Leased Originate Mode, Async Leased Originate Mode and Trellis Multipoint Control Mode, 4-wire Originate is
the factory default.
The AT command for Disable is &L0.
The AT command for 2-wire Originate is &L1.
The AT command for 4-wire Originate is &L2.
The AT command for 2-wire Answer is &L3.
The AT command for 4-wire Answer is &L4.
Autorate: Enable
Nxt Enable Disable Fast GainHit
This configuration option only appears when Leased-Line Rate is configured for V.34 and V.32 families data
rate.
Autorate. Once connected, the modem automatically lowers the line rate if line conditions become impaired. When line
conditions improve, the modem automatically shifts up to the highest data rate the line can support. This autorate only
occurs between 19,200 bps and 4800 bps during V.32, V.32bis, and V.32terbo connections and 33.6 and 2400 for V.34.
Fast – Autorate is enabled and tuned to minimize bit errors.
The AT command is S-Register S82 = n, where n is 0 for Enable, 1 for Disable, 4 for Fast, and 5 for GainHit.
GainHit – Autorate is enabled and tuned to switch to the next lower rate if gain hits exceed the rate specified using the
Gain Hit Threshold configuration option.
5-58
Leased Line Configuration Options — Singleport Mode A
14 = 7200 (V.29)
15 = 4800 (V.29)
16 = 4800 (V.27bis)
17 = 2400 (V.27bis)
18 = 19,200 (V.32terbo)
19 = 16,800 (V.32terbo)
20 = 19,200 (TMp)
21 = 14,400 (TMp)
22 = 9600 (TMp)
Table 5-11
(2 of 7)
23 = 7200 (TMp)
24 = 4800 (TMp)
25 = 2400 (TMp)
26 = 33,600(V.34)
27 = 31,200(V.34)
28 = 28,800 (V.34)
29 = 26,400 (V.34)
30 = 24,000 (V.34)
31 = 21,600 (V.34)
October 1998
32 = 19,200 (V.34)
33 = 16,800 (V.34)
34 = 14,400 (V.34)
35 = 12,000 (V.34)
36 = 9600 (V.34)
37 = 7200 (V.34)
38 = 4800 (V.34)
39 = 2400 (V.34)
3920-A2-GH30-40