It seems that HFC-S cards can be connected with asterisk in a few
different
ways - isdn4linux, mISDN, chan_capi or zaphfc. I've tried
isdn4linux (severe
echo, reproducable on every inbound call) and zaphfc (intermittent
echo,
disappears within about 30 secs of the call starting).
What's the recommended way to hook up these ISDN cards? Is
switching to capi
or mISDN likely to remove the echo problem completely, or is this
one of
those things one has to accept?
CAPI doesn't work with this card. mISDN should work, but zaphfc
should prolly be fine as well. isdn4linux will probably work, and
give you a long term headache, nausea and possibly hemroids. you may
want to tune the echo cancellation in zaptel (echocancel=256 or
something) to see if that helps...
roy
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