User`s manual

U.S. Robotics I-modem Command Reference

Appendix A: Alphabetic Command Summary • Page A-42

S54 64 Symbol rate bit-mapped register used primarily by U.S. Robotics Technical

Support for debugging purposes.

Bit Value Result

0 1 Disable 2400 symbol rate.

1 2 Disable 2743 symbol rate.

2 4 Disable 2800 symbol rate.

3 8 Disable 3000 symbol rate.

4 16 Disable 3200 symbol rate.

5 32 Disable 3429 symbol rate.

6 64 Disable Call Indicate (CI).

7 128 Disable V.8.

S55 0 Trellis code bit-mapped register used primarily by U.S. Robotics Technical

Support for debugging purposes.

Bit Value Result

0 1 Disable 8S-2D mapping.

1 2 Disable 16S-4D mapping.

2 4 Disable 32S-2D mapping.

Table AÐ1. S-register

s: Their Functions and Default Settings