R2511-HP MSR Router Series Voice Configuration Guide(V5)

211
Ste
p
Command Remarks
2. Enter voice view.
voice-setup N/A
3. Enter voice dial program view.
dial-program N/A
4. Enter VoIP voice entity view.
entity entity-number voip N/A
5. Enable call transfer.
supplementary−service sip call-transfer
Optional.
By default, call forwarding
is disabled.
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:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enter voice view.
voice-setup N/A
3. Enter voice dial program view.
dial-program N/A
4. Enter VoIP voice entity view.
entity entity-number voip N/A
5. Enable mid-call signaling
pass-through.
midcall-signal passthrough
Optional.
By default, the mid-call
signaling pass-through of
SIP-to-SIP calls is disabled.
Displaying and maintaining SIP trunk configuration
Task Command Remarks
Display SIP trunk account
information.
display voice sip-trunk account [ |
{ begin | exclude | include }
regular-expression ]
Available in any view.
Display SIP server group
information.
display voice server-group
[ group-number ] [ | { begin |
exclude | include }
regular-expression ]