Configuring Call Release Cause Code Mapping - HP FlexNetwork MSR Series Configuration Manual

Configuring call release cause code mapping

Configuration prerequisites
If a SIP server is used to forward calls, complete the configurations on the SIP server.
Configuration procedure
No matter whether a voice call is cleared normally or abnormally, a message with the call release
cause code will be sent. The default SIP status code to PSTN release cause code mappings and
PSTN release cause code to SIP status mappings are used for communication between a SIP
network and a PSTN. For more information about these default mappings, see HPE FlexNetwork
MSR Router Series Comware 5 Voice Command Reference. To adapt to more complex network
applications, you can change the default mappings through command lines.
To configure PSTN release cause code to SIP status code mappings and SIP status code to PSTN
release cause code mappings:
Step
1. Enter system view.
2. Enter voice view.
3. Enter SIP client view.
4. Configure a PSTN
release cause code to
SIP status code
mapping.
5. Configure a SIP status
code to PSTN release
cause code mapping.
Configuring periodic refresh of SIP sessions
In a high-volume traffic environment, if a BYE message gets lost for a session, the call proxy server
will not know that the session has ended, and thus still maintains the state information for the call,
which wastes resources of the server. To solve this problem, the RFC 4082 defines a session timer
mechanism for SIP sessions: the UA sends periodic re-INVITE or UPDATE requests (referred to as
session refresh requests) to notify the proxy server about the current state of the session. The
interval for sending session refresh requests is determined through the negotiation of both sides.
Two new header fields are added to the session refresh requests:
•
Session-Expires—Conveys the maximum session expiration time, that is, if no refresh request
is received during this time, the session is considered ended.
•
Min-SE—Conveys the minimum session expiration time, which is used to avoid frequent
refresh requests from occupying network bandwidth.
Configuration prerequisites
If calls need to be routed to a SIP server, complete the configuration on the SIP server first.
Command
system-view
voice-setup
sip
reason-mapping pstn
pstn-code sip sip-code
reason-mapping sip sip-code
pstn pstn-code
158
Remarks
N/A
N/A
N/A
Optional.
For the default PSTN release cause
code to SIP status code mappings, see
HPE FlexNetwork MSR Router Series
Comware 5 Voice Command Reference.
Because the PSTN release cause code
16 corresponds to a SIP request
message, instead of a SIP status code,
you can configure no SIP status code for
16.
Optional.
For the default SIP status code to PSTN
release cause code mappings, see HPE
FlexNetwork MSR Router Series
Comware 5 Voice Command Reference.