[Asterisk-Users] slight echo on incoming call

[Joan Bautista]

I'm on RH9 Stable v1.4 Version, using an old TMD400P digium card. They
are some situations when I received echo on my cisco phones:
1- Some users or PC is dowloading some files from the network.
2- A call comes in from a cell phone.
3- A international call is received on our Asterisk Box.
4. We have a separate legacy PBX that on some circumstances need to
tranfers call to asterisk. Most of those calls are received with echo.
Besides this, is about tuning the rxgain,txgain usually on a range of
1 - 3. and to be sure your Digium uses it's own IRQ. using "LSPCI"

If someone could explain to me a way to improve or solve the above
items, would really appreciate.
Thanks
Jb


On 5/12/05, Gary Carr <gc_list at carolina.net> wrote:
> Running CVS-HEAD-04/12/05-16:39:24 on CentOS 4.0 final installation. I am
> hearing a brief echo on our Cisco 7960 phones when a incoming call is
> answered. After a few seconds of conversation the echo disappears. There is
> no echo on outbound calls or transferred calls. After a search of the
> mailing list, wikki, and google I have tried the following to no avail.
> 
> echocanel=yes as well as 16, 32, 128, and 256
> echotraining=yes as well as 800
> echocancelwhenbridged=yes
> 
> I have also modified the rxgain= and txgain= settings.
> 
> Short of recompiling the zaptel with agreessive echotraining can anyone
> suggest some other things I may be missing?
> 
> Thanks,
> 
> Gary
> 
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