Enabling Midcall Signaling Pass-Through - HP FlexNetwork MSR Series Configuration Manual

Step
5. Enable call transfer.

Enabling midcall signaling pass-through

When the SIP trunk device forwards the media flows between the calling and called parties, the
device can monitor the status of the media flows over a period of time and determine whether the
endpoints have hung up abnormally. If media flow-around is enabled, the SIP trunk device does not
process the media packets from endpoints, and cannot monitor the status of the calling and called
parties.
To solve this problem, the involved endpoints can use the session timer mechanism to send periodic
re-INVITE or UPDATE requests to notify the SIP trunk device about session state.
By default, the session timer mechanism is initiated by the calling party. If the called party also
supports this mechanism, you can enable mid-call signaling pass-through to enable the called party
to process the session update information. Otherwise, the session timer mechanism only works
between the calling party and the SIP trunk device. The interval for sending session update requests
is negotiated by endpoints.
To enable midcall signaling pass-through:
Step
1. Enter system view.
2. Enter voice view.
3. Enter voice dial program view.
4. Enter VoIP voice entity view.
5. Enable mid-call signaling
pass-through.
Displaying and maintaining SIP trunk
configuration
Task
Display SIP trunk account
information.
Display SIP server group
information.
Command
supplementary−service sip
call-transfer
Command
system-view
voice-setup
dial-program
entity entity-number voip
midcall-signal passthrough
Command
display voice sip-trunk
account [ | { begin | exclude |
include } regular-expression ]
display voice server-group
[ group-number ] [ | { begin |
exclude | include }
regular-expression ]
210
Remarks
Optional.
By default, call forwarding
is disabled.
Remarks
N/A
N/A
N/A
N/A
Optional.
By default, the mid-call
signaling pass-through of
SIP-to-SIP calls is
disabled.
Remarks
Available in any view.