User manual

TECHNICAL REFERENCE

S Registers

Note: To change a setting use ATSr=n, where r is the register and n is a decimal value from 0 − 255 (unless otherwise indicated).

8-19

S34 0 Bit-mapped register setup. To set registers, see instructions for S13.

Bit Value Result

0 1 Disable 8S-2D trellis encoding.

1 2 Disable 16S-4D trellis encoding.

2 4 Disable 32S-2D trellis encoding.

3 8 Disable 64S-4D trellis encoding.

4 16 Disable non-linear coding.

5 32 Disable TX level deviation.

6 64 Disable Pre-emphasis.

7 128 Disable Pre-coding.

S35-S37 Reserved

S38 0 Sets an optional delay, in seconds, before a forced hang-up and clearing of the Transmit buffer when DTR drops during an ARQ call.

This allows time for a remote modem to acknowledge receipt of all transmitted data before it is disconnected. The modem immediately

hangs up when DTR drops. This option only applies to connections terminated by dropping DTR. If the modem receives the ATH

command, it ignores S38 and immediately hangs up.

S39-S40 Reserved