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G728 codec as inter region codec

If the codec between region is G.728, do we need transcoder dsp for the calls between the region?

I know if I didn't remember wrong in old version CCM(maybe 3.x or 4.x) there only G711 and G729 are codec can be

configured for regions. transcoder dsp is not required since phone suppport both codecs natively.

In CCM 5.x I noticed there are many codecs available. I guess the new ones are audio codec for video call.

But what if I use G728 for inter region codec for phones? Do we need transcoder ?

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