Based only on what I see below (from previous posts), it sounds like you
have two separate issues going on: 1) echo, and, 2) choppy sound. Those
should be analyzed as two problems (not one).
You will find plenty of posts in the archives relative to both. In
general terms, the choppy audio most often is caused by shared IRQ's
when using a x100p or TDM400 card, and sometimes from a misconfigured
ethernet nic on the asterisk machine. For the nic card, ensure you are
running full duplex on the nic "and" whatever the nic is plugged in to.
Both need to be the same (half duplex will work in a low usage
environment, but full duplex is preferred.)
For the IRQ issue (and we are all assuming you are using a TDM04b card
since you really didn't say), do a 'cat /proc/interrupts' and make sure
your TDM card is on its own IRQ. If it is shared with other devices, it
is likely the cause for choppy audio. You'll see the TDM driver wctdm on
that list. If it is shared, then move the TDM card from one pci slot to
another to get it on its own IRQ.
The echo problem is going to be almost aways related to "too high" of
gains in zapata.conf. Your rxgain=10 and txgain=10 are way too high as
others have already noted. Try reducing those to 0 and restart asterisk.
Then increase the values (if needed) by increments of 2 until you find a
balance between low volume and echo. I'd suggest doing that "after"
resolving the IRQ/choppy audio issues.
I have done this but I still get choppy sound and echo on some calls
thanks
*/Giovanni Miano <[EMAIL PROTECTED]>/* wrote:
Of course,
Echo is 2 types: electric and ambiental.
If u gain rx o tx more than you need, its return in recive and gen echo
Try to decrase value, try to set 0 or .. in samecase -1 -2...
2006/3/13, sdgesa gaeharth <[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>>:
Can you explain why?
*/Giovanni Miano <[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>>/* wrote:
rxgain=10.0
txgain=10.0
????
Maybe this is a problem
2006/3/13, sdgesa gaeharth < [EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]> >:
I still hear a slight echo of my voice when I talk with
somone out the PSTN. The voice on the other end sounds
very choppy and a little distorted. When I talk to other
people within our office, the sound is perfect.Can some
help?
We are all using:
Polycom 501 <--> asterisk <--> PSTN
zapata.conf:
[channels]
group = 1
language=en
context=incoming
signalling=fxs_ks
switchtype=national
usecallerid=yes
hidecallerid=no
callwaiting=yes
musiconhold=default
usecallingpres=yes
callwaitingcallerid=yes
threewaycalling=yes
transfer=yes
canpark=yes
cancallforward=yes
callreturn=yes
echocancel=yes
echotraining=yes
echocancelwhenbridged=yes
rxgain=10.0
txgain=10.0
channel => 1-4
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