ok,
here is something to add .. correct me if I'm wrong!
tomaz
Philipp von Klitzing wrote:
Hi!
It looks like there are three methods of using HFC-S based ISDN BRI
cards with *. Capi (via capi.conf), zaphfc (via zapata.conf), and
isdn4linux (via modem.conf). Why, and which one is better and for which
reasons?
-
-------------------------------------------------------------------------------------------------------
i4l: Trouble with outgoing DTMF (not working), less ISDN features than
chan_capi, known to be not very stable/reliable (?works only with HiSax
cards?), reportedly messy code, issues with echo and latency
--------------------------------------------------------------------------------------------------------
chan_capi: more features (early dial, call deflection, ISDN hold &
retrieve etc), stable, comes with echosquelch, works only with cards that
have CAPI driver support; far more popular among Asterisk users compared
to isdn4linux; can't detect if another application outside Asterisk is
already using a specific ISDN channel (?)
-DDI - p2p point2 point is NOT working
------------------------------------------------------------------------------------------------------
zaphfc: works only with HFC cards, can also be used in NT mode (so that
you can connect an ISDN PBX or an ISDN phone to Asterisk), works as ZAP
channel and thus comes along with all the usual ZAP features (echo
cancellation, ZAP timer, but also ZapBarge etc)
DDI -p2p point2point is working
------------------------------------------------------------------------------------------------------
chan_misdn: very new; needs misdn kernel module or kernel 2.6.x; not
widely used (yet)
Cheers, Philipp
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