I will agree that switching to the TDM card significantly helped my echo
and sound quality, I would take a second to point out that interrupt
sharing on your * server might cause crackling-like noises. Try
lspci -vb
and
cat /proc/interrupts
to see if you discern any hardware using the same irq the x101p is.
Also run zttest in the zaptel source directory and see what the average
number is. s/b 100%, but I believe as low as 98% or thereabouts should
have pretty acceptable call quality. If it dips even lower than that
regularly, or concurrently with the crackling sounds, then your server
is probably working too hard on irrelevant processes or has irq sharing
issues.
Moj
M.Hockings wrote:
We are running asterisk with a single POTS line for local calls and a
voip line for long distance. Whenever we receive a call on the POTS
line it is more than likely, but not always, going to have significant
distracting echo. In addition to that there is occasional heavy crackle
or static. I have tried to follow the guidelines at :
http://www.voip-info.org/wiki/view/Asterisk+echo+cancellation
but it does not seem to have made much difference.
Currently we are using a X101P for the POTS line and a TDM401B (TDM400P
with one FXS port) for the conventional telephones. From what I have
read, it may help to use an FXO port on the TDM400P rather than the
X101P for the POTS line.
What is the "conventional wisdom" about the echo in this configuration
and what causes the crackle and how should I tackle that? I have tried
rebooting/power-cycling the machine to reset the hardware but it really
hasn't noticeably helped.
Is there anything else that I can try?
Thanks, Mike
_______________________________________________
--Bandwidth and Colocation provided by Easynews.com --
Asterisk-Users mailing list
To UNSUBSCRIBE or update options visit:
http://lists.digium.com/mailman/listinfo/asterisk-users
--
Mojo <[EMAIL PROTECTED]>
Office Manger, Horan & Company, LLC
(907) 747-6666 x112
_______________________________________________
--Bandwidth and Colocation provided by Easynews.com --
Asterisk-Users mailing list
To UNSUBSCRIBE or update options visit:
http://lists.digium.com/mailman/listinfo/asterisk-users
