Hey thanx for sharing your troubleshooting. Ya over days I kind of did some
QA. There are SIP--SIP echo's between random phones. We have 75 phones of
Polycom 501. I think might be the network or combination of network & polycom
creating this.
>>Do you have the backup of old setup without this card, which you can
install and check >>what exactly the settings were before.
This is an entie new setup by me, the old one was using 1.4 build & I am
using 1.2 build both are different server.
--
Deepak
Zeeshan Zakaria <[EMAIL PROTECTED]> wrote:
Once upon a time I used to have a lot of SIP-SIP calls issues, which not
always but sometimes included echo problems. There were no zap devices on the
server. Googling and struggling to fix it, I found out that it was because of
timing issues and ztdummy was not working properly. It had to do something with
the kernel and USB modules and something needed to be fixed in BIOS and zaptel
settings somewhere (not in zapata or zaptel confs) so that it can have a
properly working timing source. I don't remember the details now but I remember
I managed to fix it by building a different kernel version on that server after
installaing some other version of zaptel, disabling USB modules on the
motherboard, fixing something in zaptel Makefile, disabling unused modules in
/etc/sysconfig/zaptel. I don't remember what else I did. but echo and other
problems disappeared after whatever I did. It was about 2 years ago and I
remember how frustrating it was.
Anyways, I guess once you upgraded your hardware, something changed in zaptel
settings somewhere which is now effecting the SIP-SIP calls and resulting in
echo. Do you have the backup of old setup without this card, which you can
install and check what exactly the settings were before.
Also I recommend going with Sangoma. I hear a lot of bad stories about digium
cards imcompatibility with certain motherboards and conflicts with USB modules
on the motherboard, and conflicts with IRQs. Thats why When I went for PRI, I
used Sangoma. I've used their A101c and A101d cards, and there have never been
any issues.
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