US Robotics 3CP5613 User Manual page 75

S Registers
Note: To change a setting use ATSr=n, where r is the register and n is a decimal value from 0
Register Default Function
S27 0 Bit-mapped register setup. To set the register, see instructions for S13.
Bit
0
1
2
3
4
5
6
7
S28 0 Eliminates the V.32 answer tones for a faster connection.
8 Default item, all times are in tenths of seconds.
255 Disables all connections except V.32 at 9600 bps.
S29 20 Sets the duration, in tenths of a second, of the V.21 answer mode fallback timer.
S30 0 Reserved
S31 128 Reserved
Value Result
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).
2 Enables unencoded (non-trellis coded) modulation in V.32 mode.
4 Disables V.32 modulation.
8 Disables 2100 Hz answer tone to allow two V.42 modems to connect faster.
16 Enables V.23 fallback mode.
32 Disables V.32bis mode.
64 Disable V.42 selective reject.
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.
T R
ECHNICAL EFERENCE
255 (unless otherwise indicated).
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