Installation & Operation Manual
774
Document # LTRT-92224
Mediant 8000
43.16.3
Transcoding Modes
The device supports the configuration of the voice transcoding mode (media
negotiation) between the two SBC legs. The device can be configured to perform
transcoding only when necessary. Typically, the SBC application passes RTP packets
transparently (RTP-to-RTP) between the two user agents. If the device is configured
to always perform transcoding, then transcoding is performed on the outgoing SBC leg
and the device's SBC application interworks the media by implementing Media
transcoding (since both legs have different media capabilities).
In the SBC application, forced transcoding of voice in an SBC session allows the
device to receive capabilities that are not negotiated between the SBC legs. For
example, if you wish to force Gain Control on the SBC session to use voice
transcoding, even though both sides of the session have negotiated without SBC
intervention (for example coder extension).
Note:
To implement transcoding, you must configure the number of required DSP
channels used for transcoding via Number of Media Channels parameter in the SIP
Configuration screen. Each transcoding session uses two DSP resources.
Summary of Contents for Mediant 8000
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Page 33: ...Part I Hardware Overview This part describes the hardware overview of the Mediant 8000 chassis...
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Page 775: ...Part VI Maintenance This part describes the Mediant 8000 maintenance procedures...
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Page 879: ...Part VIII Appendices This part describes additional Mediant 8000 configuration procedures...
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Page 924: ...Media Gateway Mediant 8000 www audiocodes com Installation Operation Maintenance Manual...