US Robotics USR5610B User Manual page 91

Table 6 - 5 Settings for S15
Bit Value Result
7 128 Disable V.42 operation.
Note:To disable V.42
detect phase, select sum of
bits 3 and 7 (in other words
S15 = 136 [8 + 128])
Table 6 - 6 Settings for S27
Bit Value Result
0 1 Enables ITU-T V.21
modulation at 300 bps for
overseas calls; in V.21
mode, the modem answers
both overseas and
domestic (U.S. and
Canada) calls, but only
originates V.21 calls
(default Bell 103).
1 2 Enables unencoded
(non-trellis coded)
modulation in V.32 mode.
2 4 Disables V.32 modulation.
3 8 Disables 2100 Hz answer
tone to allow two V.42
modems to connect faster.
4 16 Enables V.23 fallback
mode.
5 32 Disables V.32bis mode.
6 64 Disable V.42 selective
reject.
7 128 Software compatibility
mode. This setting disables
the codes and displays the
9600 code instead. The
actual rate of the call can
be viewed on the ATI6
screen. Used for unusual
software incompatibilities.
Some software may not
accept 7200, 12,000, and
14,400 bps or greater
result codes.
Bit-Mapped Registers 85