This problem has dogged me for weeks now.
I have installed the latest Asterisk (1.4.9), libpri 1.4.1, zaptel 1.4.4 -
and the TRUNK version of chan-capi. also the HEAD version -
all compiled well under CentOs 5.0 - and it works with IAX soft phones properly.
However, when I call from an ISDN phone through chan_capi to asterisk -
I hear no PlayBack
MusiconHold is violent data stream noise
I can hear what is said into the phone in the softphone
but in ISDN I hear noise, or nothing.
dialing in and out - no problem.
I have tried many things - the 1.2 branch of Asterisk and all else, the HEAD
version of chan_capi, stable - all of them. but still the problem remains.
I have also tried several versions of the C4 firmware - no difference.
This card was working on a PII 2 CPU machine and a much earlier version of
asterisk and chan-capi.
My new machine is a Dual core Pentium 4300 w/ 4gb RAM. Very fast, stable, but
it can not go into production until this is fixed!
thank you -