Paradyne Comsphere 3920Plus Installation And Operation Manual page 229

Table D-2 lists V.25bis response messages supported by the 392xPlus modems.
V.25bis Command
CFI Call Failure Indication
CNX Call Connecting Indication
LSN List Stored Number
VAL Valid Command
INV Invalid Command
3920-A2-GN31-10
Table D-2
V.25bis Response Messages
Description
Call Response
List Response
Command Response
April 1995
CCITT V.25bis Dialing Commands and Responses
AT Command/
Result Code Equivalent
BUSY, NO ANSWER, NO
CARRIER, NO DIAL TONE,
ERROR
CONNECT
NONE
OK
ERROR
D-7