SERIES II INTELLIGENT DATA/FAX MODEMS

V.25bis Responses (Result Codes)

When in V.25bis mode (the AT$V1 command executed), your modem provides you with several responses which can help you follow the progress of V.25bis operations. These are similar to the Result Codes associated with AT Command mode operation. The V.25bis responses are in the form of three-character mnemonics as listed below:

INC

Incoming Call (same as RING indicator)

VAL

A valid V.25bis command has been attempted

DLCt

Call delayed for t minutes (number on Delayed list)

CFlrr

Call failure indicator where rr equals:

 

 

et - Engaged tone (same as BUSY)

 

 

nt - Call Answered but No Answer Tone

 

 

ab - Call Not Answered

 

 

fc - Number on Forbidden List

 

 

ns - Number not stored in memory

 

 

ua - User Abort

 

 

nd - No Dialtone

 

 

ff - Forbidden List full

LSNmm;dd...dd

Phone number in V.25bis memory

LSDmm;dd...dd

Phone number on the Delay list

LSFmm;dd...dd

Phone number on the forbidden list

CON ssss

 

Connection at ssss speed (if X1 in effect)

V.25bis AT Commands

The AT commands associated with V.25bis mode are described as follows. Note that one command enables and disables V.25bis mode and the rest are only operable in the V.25bis mode.

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Black Box MD1641A, MD1640A manual 25bis Responses Result Codes, 25bis AT Commands