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ISDN COMPLETION CAUSE CODES
This appendix lists the Completion Cause Codes displayed in one of the
Span Status dialog boxes:
■ Digital Line Cards > T1 Span List > Status
■ Digital Line Cards > ISDN PRI Span List > Status
■ Digital Line Cards > ISDN BRI Span List > Status
The codes, listed in Table 83, detail the reasons for the termination of a
call. See “
Configuring and Managing E1 Digital Line Cards” on
page 226
.
These completion cause code descriptions are only guidelines.
The detailed cause may vary according to the Public Switched Telephone
Network (PSTN) to which your NBX system is connected.
Table 83 Completion Cause Codes
Class Grouping Hex Code
Decimal
Code
Description Details
Normal events 0x00 0 No diagnostic
0x01 1 Unassigned
number
The requested destination, although valid, cannot be
reached.
0x02 2 No route The sending equipment (sending the cause)
is requested to route the call through an unrecognized
transit network.
0x03 3 No route to
destination
The called user cannot be reached because the
network does not serve the destination.
0x06 6 Channel
unacceptable
The last identified channel is not acceptable to the
sending entity.
0x07 7 Call awarded The incoming call is connected to a channel already
established for similar calls (e.g. packet-mode X.25
virtual calls).
0x10 16 Normal
clearing
This call is being cleared by one of the users involved.