US Robotics 3Com Manuel d'utilisateur télécharger pdf (Page 78)

TECHNICAL REFERENCE

8-27

S27 0 Bit-mapped register setup. To set the register, see instructions for S13.

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.

1 2 ... 73 74 75 76 77 78 79 80 81 82 83 ... 100 101

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US Robotics 3Com Manuel d'utilisateur Page 78