[Asterisk-Users] Maybe an echo cancellation problem?

[Eric Giesselbach]

Jack,

Several voip clients can optionally suppress silent packets. If no voice is detected, rtp packets are kept back. This saves bandwith but can disturb a conversation ("Hello John, still there?"). Softphone XLite has this option active by default. 

Search for options like "silence suppression", "noise cancellation" or "voice detection" in your voip client.

Eric.

> -----Original Message-----
> From: 1 2 [mailto:vortex_0_o at yahoo.com]
> Sent: Friday, April 01, 2005 3:46 PM
> To: asterisk-users at lists.digium.com
> Subject: [Asterisk-Users] Maybe an echo cancellation problem?
> 
> 
> Hi
> 
> Was hoping someone could point me in the right
> direction.
> 
> using asterisk cvs in various VOIP configurations
> 
> On a call when the loudness of transmit > receive then
> all receiving is null. 
> 
> In practical terms this causes background  noise (from
> the other end)to stop when you are talking and come
> back on when you are quieter. Often causing background
> noise to seem like it is switching on and off as you
> speak during a call similar to if you were using a CB
> radio.
> 
> in testing calls:
> 
> transmit = null 
> receive = steady noise (generated from the other end)
> 
> transmit = quiet
> receive = steady noise (generated from the other end)
> 
> transmit = normal/high
> receive = null
> 
> 
> Does this seem like it is echo cancellation related?
> 
> Any pointers as to what topic this sort of thing would
> fall under?
> 
> Thanks
> 
> Jack
> 
> 
> 		
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