Steven Ayre wrote:

If G729 is at both ends, then no encoding/decoding is required as the

raw data can be sent straight through. This is passthrough mode.

Because there is no encoding/decoding stage, there is no licence

required in this case.

A more appropriate way to say this is no transcoding. Encoding/decoding
processes are still done at each endpoints on the device, i.e IP Phone, ATA,
and/or computer (with softphone), and a G729 license is still required when
the call uses the G729 CoDec (which is mostly paid when one acquired the
device with a built-in G729 CoDec). So, to say no encoding/deconding
involved and no license required are really misleading and definitely
incorrect.

BTW, one can also configure his/her FS system with bypass media option to
ensure the FS only does the SIP with no media handling. The advantage using
this approach is to leave FS alone and free up some of its networking
resounrces to handle the media during a call. There is also some
disadvantages, i.e. no MOH, etc.

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