I'm having a related issue with "could not fill input buffer" and
submitted this bug report:
http://bugs.digium.com/view.php?id=7264
Rather then fixing volume issues, though, I'm trying to fix major echo
issues. [The card used to work fine. fxotune even fixed the echo the
first time I tried it, but gets the error you've been getting since
then (granted though I'm now using zaptel SVN instead of a patched 1.2.5).]
I'm at the point now where I either get fxotune working or buy a Sangoma
card with hardware echo cancellation.
-Barry King
Andrew D Kirch wrote:
I am currently running Asterisk 1.2.8, on an AMD Sempron 3100+ (ASUS K8N
Nforce based board). I am using a Digium wctdm24xxp to terminate 8 (2x
quad) FXO lines. Using ztmonitor (From zapata) I cannot see that there is
any registerable incoming volume from these lines. I've been running them
at rxgain = 25 (zapata.conf) to make the audio audible, however this
creates poor call quality issues (static and distortion) on most calls,
and audio garble in voicemails. Fxotune fails for every line with "Could
not fill input buffer"
I've tried changing PCI slots, played with echo settings, and done
everything else I can think of to make this card play nice to no avial.
Anyone with solutions or ideas, your input will be greatfully appreciated.
Thank you in advance.
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