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

208
Ste
p
Command Remarks
4. Enter VoIP voice entity view.
entity entity-number voip N/A
5. Enable codec transparent
transfer.
codec transparent
Optional.
By default, codec
transparent transfer is
disabled and the SIP trunk
device is involved in the
media negotiation between
the calling and called
parties.
Note that to enable codec
transparent transfer on the
SIP trunk device, execute
this command on all VoIP
voice entities connected to
the public and private
networks.
Enabling media flow-around
This function enables the media packets to pass directly between two SIP endpoints, without the
intervention of the SIP trunk device. The media packets flow around the SIP trunk device.
To enable media flow-around:
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 media flow-around.
media flow-around
Optional.
By default, media
flow-around is disabled.
The SIP trunk device acts as
the RTP trunk proxy and
forwards the media
packets.
Enabling delayed offer to early offer conversion
An INVITE message sent with SDP in the message body defines an early offer, and an INVITE message
sent without SDP in the message body defines a delayed offer. Some carriers mandate early offer calls
for charge security. To meet this requirement, enable delayed offer to early offer (DO-EO) conversion on
the SIP trunk device.
To enable DO-EO conversion: