chan_capi is a Common ISDN API 2.0 driver for Asterisk.

Because Asterisk only comes with isdn4linux support (which degrades your ISDN card to a voice modem) we have developed chan_capi. The current version supports more functions than chan_modem_i4l and has better audio quality with less latency.

Take a look at the list of implemented features.

chan_capi is released under the terms of the GNU general public license (GPL).

We greatly appreciate feed back to kpj@junghanns.net
You can find me at irc.freenode.net in #asterisk as kapejod.


Supported Platforms

Linux (capi4linux)

FreeBSD (CAPI 4 BSD)

Download

chan_capi version 0.4.0 (Asterisk STABLE, CVS-HEAD)

+ ISDN connection handling
(CID,DNID, DID, DDI)
+ multiple Controller support
+ digital audio support
+ DTMF (soft/hardware)
+ CLIP/CLIR
+ early B3 connects
(inband callprogress)
+ CD, HOLD, RETRIEVE, ECT
+ overlap sending
+ call progress (INFO_IND)
+ RX/TX gains
+ call deflection on circuit busy

+ supplementary services
CF,CCBS,CCNR,3PTY
+ charge info (AOC-D,E)
+ native capi channel bridging
+ fax support (hard/software)