Paradyne COMSPHERE 3810 Information Sheet page 4

Table 3 shows the changes to the User's Guide for S-Registers when the V.29 or V.33 Option is installed.
S-Register
S44 Leased-Line Rate
User's Guide p. 13-34.
Register determines the modem's data rate and modulation scheme
for operation on either 2-wire or 4-wire leased lines in either Answer or
Originate mode.
Register has the following values:
0, 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)
14 = 7200 (V.29)
15 = 4800 (V.29)
= 19,200 (V.32 terbo )
18
19 = 16,800 (V.32 terbo )
Factory setting is 19,200 (V.32 terbo ).
S92 V.29 Train On Data
(Not documented in User's Guide.)
Register determines whether the modem must receive a standard V.29
training sequence in order to enter Data mode (Disable) or whether it
should use the received Data mode for training (Enable). Effective only
if V.29 is selected for the leased-line rate.
Register has the following values:
0=Disable
1=Enable
Factory setting is Disable.
Table 3
3800 Series S-Registers
Description
4
Front Panel Branch
Configure\Edit\Leased Line
Configure\Edit\Leased Line