[Asterisk-Users] sidetone noticeably loud on analog handsets on T100P
asterisk-users.lists.digium.com at tgice.com
Tue Jun 22 16:17:42 MST 2004
I've run into a problem that I can't figure out on a bunch of handsets I
have running into a Rhino Equipment 24-port FXS channel bank hooked up
to a T100P and running asterisk-0.9.0 and the associated stable Zaptel
The sidetone (your own voice that you hear in your handset, built in for
comfort) is noticeably louder than it should be, and it doesn't seem to
make any difference if I adjust the rx/txgain in zapata.conf (on either
the inside Zap channels [handsets] or the external [POTS lines] ones
(which are routed through another channel bank [Carrier Access AB I] and
a separate T100P card). What's also strange is that when I place a call
from inside, the callee hears my voice fine and I can hear their voice
with very little difficulty, but the my own sidetone is always too loud.
We've got regular analog handsets running into the Rhino channel bank
and they seem to work fine for everything else, we've experimented with
volume controls on the handsets themselves as well as on some
Plantronics headsets that are plugged into them (but have also of course
tested this scenario without the headsets for isolation). The analog
phones are known good by themselves and do not exhibit this behavior
when directly plugged into a POTS line.
Has anyone experienced this? I did some googling on it through the
archives of course, but don't see much discussion of sidetone issues
with analog handsets.
I'm wondering if there's some way I could be adjusting the sidetone in
Asterisk or should I be looking at my FXS channel bank?
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