[asterisk-users] Echo problem in VoIP-calls

[Jonas Kellens]

Hello Gareth,

echo also appears when making calls with a SIP phone. These are outgoing 
calls.

Another site now also gives feedback on echo, telling they sometimes 
also have echo on outgoing calls and if they recall right then sometimes 
also on incoming calls (coming from a queue).

This one site that now also gives feedback on echo has a fiber optic 
internet connection, so I don't think the latency plays a role here.

I will now turn off the buffer in sip.conf and see how this goes...

I hope I can resolve this echo-problem.


Jonas.


On 06/30/2010 04:24 PM, Gareth Blades wrote:
> Try the SIP phone. If it is better then you might try looking to see if
> there are any echo cancelation settings on the softphone or analogue
> adapter you can change. Try turning echo cancelation off aswell since if
> there are two running they can interfere with each other and make the
> situation worse.
>
> If you hear echo on that phone then it might be that the network
> connection from that location has a higher latency making the echo far
> more noticeable.
> If the other party you are connecting to hears echo then this could be
> down to the phone or the jitter buffer. If you start with a small jitter
> buffer the echo cancelation will train to that but if you get increased
> jitter the buffer will grow and add an additional delay to the audio.
> Often echo cancelation only trains at the start of a call.
> Maybe try disabling the jitter buffer.
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