[Freeswitch-users] questions about VAD and echo cancellation

[Michael Collins]

What is NB?

On Sun, Dec 19, 2010 at 11:00 AM, joy this <thisjoy0528 at gmail.com> wrote:

> Could you give me any suggestions?
>
> Sincerely yours,
> Thisjoy.
> 2010/12/17 joy this <thisjoy0528 at gmail.com>
>
>> Dear all:
>>
>>
>>
>>         I have questions about VAD and echo cancellation. My FS is
>> Version 1.0.head (git-) under Windows XP. My soft-phone is X-Lite. I use
>> earphones and microphones for sip 1 which means the talking and hearing are
>> separated; on the other hand, I use NB for sip 2 which makes the talking and
>> hearing in the same place. Sip 1 (1000) calls sip 2 (1001) via FS. When I
>> say something via sip 1, the echo will occur, and the echo will only occur
>> on sip 1.
>>
>>         How do I cancel the echo? Buy a hardware card or something else?
>> I have two gateways which are Wellgate2644 and ata171m. Please give me some
>> suggestions.
>>
>>         When I enabled VAD, I found something strange. In the start of
>> the session, I can hear the noise and echo on sip 1. If I say something via
>> sip 2, the echo and the noise will disappear. Then the echo will not occur
>> on sip 1 only in a short time, about several seconds. The echo and the noise
>> will occur gradually if I say something via sip1. Is it a normal situation?
>>
>>
>>
>> Sincerely yours,
>> Thisjoy.
>>
>
>
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