I would also offer feedback that we too have random calls with echo on
our end, that can't be traced to a reproducible event. It's very odd
and can be frustrating, as it's a big distraction for those that don't
know better. Like a bad cell phone connection when you hear yourself
talk. For us,
I do feel the echo cancellation does need some work.
Currently, other than listening to users, there is no way to benchmark or
trouble shoot echo problems.
Sure there are, it's just that 99% of the asterisk implementors don't
have the test equipment to do it, and a good share probably
snip
I've got a fair amount of test equipment (and 20+ years telephony
background), and am planning to assemble a document identifying some of
the pstn issues, level settings, and other things impacting a reasonable
system implementation. Unless someone wants to UPS a transmission test
set to
At 02:30 PM 4/22/2004, you wrote:
I would also offer feedback that we too have random calls with echo on our
end, that can't be traced to a reproducible event. It's very odd and can
be frustrating, as it's a big distraction for those that don't know
better. Like a bad cell phone connection when
We have three Cisco 7940 SIP phones and 1 POTS phone connected to our
*
server with TDM10B fxs card. Our * server is connected to the pstn
with
3
X100P cards. We have similar echo problems but only on our SIP
phones.
We do not have any echo problems with the POTS phone.
We just
The single most usefull tool that anyone outside telco consultants is
likely to have is ztmonitor.
If you do a ztmonitor [channel number] -v you will get a visual of the
sound strengths and it's pretty easy to see when rx or tx are out of
balance...
Now, if only that would help fix the
I've got a really cheap analog phone connected to a Sipura SIP adaptor,
and have zero echo problems...
Just static problems, but it may be related.
Chris.
On Thu, 22 Apr 2004, Brent Franks wrote:
We have three Cisco 7940 SIP phones and 1 POTS phone connected to our
*
server with TDM10B
snip
I've got a fair amount of test equipment (and 20+ years telephony
background), and am planning to assemble a document identifying some of
the pstn issues, level settings, and other things impacting a reasonable
system implementation. Unless someone wants to UPS a transmission test
At 02:30 PM 4/22/2004, you wrote:
I would also offer feedback that we too have random calls with echo on our
end, that can't be traced to a reproducible event. It's very odd and can
be frustrating, as it's a big distraction for those that don't know
better. Like a bad cell phone connection
