voice class codec ????????? Which is good for quality of voice

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Jan 10th, 2003
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I have seen few types of codec preferences in VOIP network. Which one should I configure fro VOIP dial peer. Codes g711ulaw or g729r8 or g726r16 or r32..

Please advice which one will give me good quality of voice. I have seen the voice quality is deterioting quite a lot.

Guys please help out



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scottmac Mon, 01/13/2003 - 15:16
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Generally speaking, the choice of CODEC is determined mostly by how much bandwidth you have (usually across a WAN), and how many concurrent sessions (calls, or calls + data) you'd like to support.

Some of the CODECs you mentioned can operate in very little bandwidth (but the voice quality suffers -G.729-) some of them use most or all of a 64K channel (or more), but the voice quality is much better (-G.711-).

If you can, run a pilot installation and try out the most likely candidates.

Ultimately, you end up choosing Voice Quality (and using/getting more bandwidth) or bandwidth (and getting used to ~cell phone voice quality).



Next is: What are you going to connect to on the other side? Not all equipment will support the same variety of CODECs.


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