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255-700-447
C-5
PacketStar
®
PSAX 2300 Multiservice Media Gateway User Guide
, Issue 1
Release 9.0.0
Appendix C Reference Information
SPVC Connection Cause Codes for Connection Retry
equipment at the far (remote) end, the PSAX system will try to establish the
connection again up to the number of times specified in the Retry Limit field
on the SPVC connection configuration windows. The ATM Forum UNI and
Frame Relay Forum FRF.4 standards use many (but not all) of the same
release cause codes, and these standards reference ITU-T standards for many
of the release cause codes.
Table C-2. Connection Release Cause Codes for SPVCs
Release
Cause
Code
Description
Prompts
a Retry
Referenced
Standard
1
Unallocated (unassigned) number. The called party number is
not currently assigned. As a result, the called party cannot be
reached.
No
ITU-T Q.850
2
No route to specified transit network. The equipment sending
this cause code received a request to route the call through an
unknown transit network. The transit network is unknown
to the equipment because it does not exist or does not serve
the equipment.
No
ITU-T Q.850
3
No route to destination. The network through which the call
was routed does not serve the destination. As a result, the
called party cannot be reached.
Yes
ITU-T Q.850
10
VCC is unacceptable. The VPI/VCI is unacceptable to the
sending entity for use in the call.
No
ATM Forum UNI
3.0/3.1
16
Normal call clearing.
No
ITU-T Q.850
17
User is busy. The called party is unable to accept another call
because the user-busy condition has been encountered.
Yes
ITU-T Q.850
18
No user is responding. A called party did not respond to a call
establishment message with either an alerting or connect
indication within a designated time period.
No
ITU-T Q.850
21
Call was rejected. Although the equipment sending this cause
code is neither busy nor incompatible, the equipment sending
this cause code does not want to accept the call. The cause
can be generated by the network to indicate that the call
might have been cleared as a result of a supplementary ser-
vice constraint.
No
ITU-T Q.850
22
Number was changed. The number of the called party is no
longer assigned. A new number must be used to call the
called party.
No
ITU-T Q.850
23
User rejects all calls with calling line identification restriction
(CLIR). The called party returns this cause code when the call
comes in without calling party number information and the
called party requires this information.
No
ATM Forum UNI
3.0/3.1
27
Destination is out of order. The user cannot reach the destina-
tion because the interface to the destination is not function-
ing properly; that is, a signaling message could not be deliv-
ered to the destination.
Yes
ITU-T Q.850