[Asterisk-Users] Echo problem

[Michael D Schelin]

I'm sorry all, lines means config lines of code.


Michael D Schelin wrote:

> Hi Martin, There was an great post last week about echo. It stated that 
> the order of the lines matters. It does. The channels must be listed 
> last for the echo cancel and most other things to work. Rx and TX gain 
> is one of the things also affected. Now I'm using TE110 card in my 
> system. I hope this helps because I'm not sure about Analog lines.
> 
> 
> 
> 
> 
> Martin Roy wrote:
> 
>> Ok I tried Digium TDM400 cards, I tried X100p cards, I tried Clipcomm  
>> CG-410 4 FXOs device. Now I just ordered a few Sipura 3000.
>>
>> With the Digium TDM04B cards (4 FXOs) and X100p cards I tried the  
>> following :
>>
>> echocancel=yes
>> echocancelwhenbridged=yes
>> echotraining=yes (I tried 800 with TDM04B cards but it didn't made  
>> any difference)
>> rxgain= I tried from -8.0 to 10.0
>> txgain = I tried from -8.0 to 10.0
>>
>> by the way I live in Canada and the provider is Bell Canada for all  
>> lines (I have over 10 lines at one place and 3 lines at another places)
>>
>> I tried on a bunch of different computers. I tried on a P4, a dual  
>> Xeon, a dual AMD Opteron, a bunch of Macs too (for X100p cards) a  
>> PowerMac 8500, 9600, 9650, G3 Desktop, G3 B&W and G4.
>>
>> I have echo problem on all of them. I even tried on different OS.  
>> Fedora Core 1, 2 and 3 for the PCs and Yellow Dog Linux 3.01 and 4.0  
>> for the Macs. I even tried the Clipcomm CG-410 on OS X (10.2.8,  
>> 10.3.x and even 10.4)
>>
>> I'm using Cisco IP Phone 7960 with SIP firmware 7.3 and a few  
>> Granstream GXP-2000. The echo is a lot worst on Cisco phones.
>>
>> Now I just ordered 5 Sipura 3000 to see if that will remove the echo.  
>> I can't understand why it wouldn't work with the Digium cards...
>>
>> If someone has a clue to help me figure out how to remove this echo  
>> well let me know as right now I'm considering that all Digium cards  
>> sucks... For Clipcomm well the echo was there and I can't get Caller  
>> ID to work so it's useless...
>>
>> Thanks
>>
>> Martin
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> 
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