Enabling Codec Transcoding - HP FlexNetwork MSR Series Configuration Manual

Step
4. Enter VoIP voice entity view.
5. Enable DO-EO conversion.
NOTE:
If codec transparent transfer or media flow-around is enabled, the early-offer forced command
does not takes effect.

Enabling codec transcoding

In the scenario where the SIP trunk device controls the results of media capability negotiation, if the
SIP trunk device cannot find a common codec for two parties during negotiation, the two parties will
fail to establish a call. In this case, enable codec transcoding on the SIP trunk device.
With this function enabled, the SIP trunk device uses its own codec capability set to negotiate with
the calling and called parties respectively. If the negotiated codecs with the two parties do not match,
the SIP trunk device transcodes the media flows passing through it.
The codec transcoding feature does not take effect in any of the following cases:
•
Codec transcoding is enabled, but no DSP resources are available for codec transcoding.
•
Codec transparent transfer is enabled.
•
Media flow-around is enabled.
To enable codec transcoding:
Step
1. Enter system view.
2. Enter voice view.
3. Enter voice dial program view.
4. Enter VoIP voice entity view.
5. Enable codec transcoding.
Enabling address hiding
If the SIP trunk device acts as the session border gateway, the addresses of the endpoints are
always hidden to the peers. The SIP trunk device replaces the endpoints' addresses carried in SIP
messages with the addresses of the corresponding egress interfaces. For both the calling and called
parties, the SIP trunk device is the only ingress of signaling and media packets.
Address hiding does not take effect for a voice entity enabled with media flow-around.
To enable address hiding:
Step
1. Enter system view.
Command
entity entity-number voip
early-offer forced
Command
system-view
voice-setup
dial-program
entity entity-number voip
codec transcoding
Command
system-view
208
Remarks
N/A
Optional.
By default, DO-EO
conversion is disabled.
Remarks
N/A
N/A
N/A
N/A
Optional.
By default, codec
transcoding is disabled.
Remarks
N/A