One special value of S38, S38 = 251, is used for back-to-back (factory) testing of V.34 rates, with DSP code running in external memory. Set S38=251 on both originating and answering modems. (This feature is not valid with ramless solution.)

S42 Auto Rate (default 1, range 0-1)

This command is used for testing and debugging only. V.32bis and V.22bis auto rate is disabled. Retrain operation is disabled or enabled in data mode, and fallback is disabled in data mode. In K56flex mode, S42=0 forces connection at the rate specified by S38 (even if the rate cannot be sustained), without fallback to V.34.

0 = auto rate disabled, 1 = enabled.

Range: 0-1

Default: 1

S43 Auto Mode (default 1, range 0-1)

This command is used for testing and debugging only.

V.32bis startup auto mode operation disabled.

0 = auto mode disabled, 1 = enabled.

Range: 0-1

Default: 1

S48 LAPM Error Control and Feature Negotiation (default 7)

S48 = 7 Negotiation enabled

S48 = 128 Negotiation disabled; forces immediate fallback options specified in S36

The following chart lists the S36 and S48 configuration settings necessary to negotiate certain types of connections:

Table 7: S36 and S48 Configuration Settings

 

S48 = 7

S48 = 128

 

 

 

S36 = 0,2

LAPM or hangup

do not use

 

 

 

B-14Intel® PRO/100 SP Mobile Combo Adapter: User’s Guide

Page 40
Image 40
IBM PRO/100 SP manual S42 Auto Rate default 1, range, S43 Auto Mode default 1, range