ADTRAN DSU III AR User Manual page 45

The following list contains possible responses to V.25 bis
commands:
VAL
CFIET
CFIDE
CFINS
INVCU
INVPS
INVPV
INVBL
INVBM
INC
CNX
If verbose responses are disabled (ATV0), the following list of three-
character responses are the only ones returned:
VAL
INV
CFI
INC
CNX
Syntax and Possible Responses
CIC (Connect Incoming Call)
This command causes the DSU to go on-line. For dial backup units,
this command hangs up the dial backup line and initiates an
attempt to reestablish the main (DDS) line. There are no parameters
associated with this command. Possible indications include VAL,
CNX, and CFIxx.
61202011L1-1
Valid V.25 command processed
Call failed on switched network - busy detected
Call failed on switched network - no wink de-
tected
Call failed - no dial string in specified register
Unknown command detected
Invalid parameter syntax
Invalid parameter value
Invalid local password
Invalid remote password
Incoming call
Call connected
Valid V.25 command processed
Invalid command received
Call failed
Incoming call
Call connected
DSU III AR User Manual
Chapter 4. Configuration Overview
4-9