Specifications

41
CHAPTER 5: Configuration Overview
Special V.25 Configuration Commands
In addition to the CCITT commands supported, Black Box has added
configuration commands for both local and remote DSUs:
CNL Configuration local
CNR Configuration remote
Possible responses to V.25 bis commands follows:
VALA Valid V.25 command processed
INV An invalid command detected
INVCU Unknown command detected
INVPS Invalid parameter syntax
INVPV Invalid parameter value
INVBL Invalid local password
INVBM Invalid remote password
If verbose responses are disabled (ATV0), the following three-character responses
are the only ones returned:
VAL Valid V.25 command processed
INV Invalid command received
Syntax and Possible Responses
CNL (Configuration Local)
This command is used to pass AT commands to the local DSU via the V.25 bis
command processor. This allows the CSU/DSU MS DBU to be configured with AT
commands using a synchronous interface. The format is as follows:
CNL[LOCAL PASSWORD];AT[ONE OR MORE AT COMMANDS]
A local password may not be required depending on the present configuration of
the unit. Responses to CNL commands are returned in the data format currently
configured. The possible responses are VALA and INVAn.
This command is used to pass AT commands over the network to the remote DSU
via the V.25 bis command processor. This allows a remote CSU/DSU MS DBU to
be configured from a synchronous interface. The format of this command follows:
CNR[REMOTE PASSWORD];AT[ONE OR MORE AT COMMANDS]
The remote password may or may not be required depending on the present
configuration of the remote unit. Responses to the CNR commands are returned
in the data format currently configured. Possible responses are VAL and INVAn.