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

byju70 · ‎01-10-2003

HI

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

Thankx

Byju

scottmac · ‎01-13-2003

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).

FWIW

Scott

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