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martinprint asked on

Which VoIP codec to use on a slow connection

Hi Expert,
  What codec would you recommend I use for a ADSL connection that has a fair amount of latency (approx. 200 ping to SIP server).

So far I have been having most success with gsm although I did experiment with g729 for a long time but was told this would only be good if I had less latency?

Thanks,
 Martin
Voice Over IPIP TelephonyTelecommunications

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getzjd

8/22/2022 - Mon
getzjd

getzjd

Oops... the second link was supposed to be this one http://voip.about.com/od/voipbasics/a/voipcodecs.htm
getzjd

What type of phone system are you using it on?  That makes a difference too
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ASKER
martinprint

Phones are Snom / Cisco but we are now experimenting and having luck with much cheaper chinese models.

g729 has too much delay for us. We find ourselves talking at the time as the client a lot of the time. This does not really happen with gsm.

Does my question make sense?
ASKER CERTIFIED SOLUTION
mark_06

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ASKER
martinprint

How about speex or iLBC would they be better for low bandwidth? (compared to gsm)
mark_06

You can give it a go. It's just trial and error i'm afraid as to what will best suit you.
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ASKER
martinprint

Is there a service I can use to help me test? Or do I have to "phone a friend" ?
getzjd

You have to phone a friend.  Phone home... Phone home.  lol