255-700-239
D-3
PacketStar
®
PSAX 4500 Multiservice Media Gateway User Guide
, Issue 2
Release 8.0.0
Appendix D Reference Information
ATM UNI Specification Cause Codes, Version 3.1
CLP bit value for cells passing into bucket 1 and drops all cells violating the
value set for the PCR. For bucket 2, the system takes one of the following
actions:
~
When the connection is configured for variable bit rate (VBR) traffic, the
Multiservice Media Gateway tags all CLP=0 cells violating the value set
for the SCR to CLP=1 in bucket 2.
~
When the connection is configured for constant bit rate (CBR) traffic, the
Multiservice Media Gateway tags all CLP=0 cells violating the value set
for the PCR to CLP=1 in bucket 2.
The network then might drop some or all cells during congestion.
ATM UNI Specification Cause Codes, Version 3.1
SPVC connection cause codes, displayed in the Last Rls Cause field on all the
SPVC connection configuration windows, are provided in . The word Yes in
the “Prompts a Retry”column indicates that if the cause code number, shown
in the “Cause Code” column, is reported by the 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 connec-
tion configuration windows. The ATM Forum UNI and Frame Relay Forum
FRF.4 standards use many (but not all) of the same cause codes, and these
standards reference ITU-T standards for many of the cause codes.
Table D-1. Connection Cause Codes for SPVCs
Cause
Code
Description
Prompt
s 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 send-
ing entity for use in the call.
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 indi-
cation within a designated time period.
No
ITU-T Q.850
