Tzafrir Cohen wrote:
On Fri, Feb 16, 2007 at 12:39:54AM -0500, Allen Casteran wrote:
We have SIP phones connecting to *, and our PSTN lines connecting
through an Astribank FXO.
Internal Sip<->SIP calls are clear.
External calls through the Astribank get occassional low level buzzing
for about 1/2 - 1 sec at a time.
Those are usually accompanied by some light pops or static
No transcoding, all ulaw.
PSTN lines come from an Adtran IAD channel bank about 10 ft of cable
from the Astribak. Astribank and Adtran are both chassis grounded to our
UPS.
Tried set echocancel=on and echocancel=off in the zapata.conf... No
difference.
You mentioned (in another mail) that if you connect the same line to the
PSTN the line is clear. Was it in the same setup or were there some
resets and/or reconfigurations in the process?
If you connect a simple phone insted of the Astribank, do yu have the
same problems?
Same setup.
We replaced analog phones with the * Server and then noticed the
buzzing. Before installing the * server the analog phones had been used
on the same lines with no problems for about a year. No changes have
been made to the lines themselves.
The buzz occurs every minute or so, but not on any schedule that I can
determine. (ie not every 65 seconds).
I have done several config changes on the * server to try and eliminate
the problem to no avail.
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