[Asterisk-Users] Best drivers for HFC-S ISDN cards

[Roy Sigurd Karlsbakk]

> 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