4.2.2. Asterisk, chan_capi and the CAPI interface - Howto
1. Introduction
2. Chan_capi
http://lists.digium.com/pipermail/asterisk-users/2003-November/027741.html
CAPI stands for Common-ISDN-API. It is an interface for communication through basic rate interfaces (BRI) or primary rate interfaces (PRI).
CAPI works fine with the following platforms:
Some of the CAPI features and functionalities are:
Supported communication protocols:
Supported national signaling protocols:
Keep in mind that CAPI is not compliant with all the hardware products as well as all the applications. So, before using it, check out the list with the compliant hardware and applications supporting CAPI. The list can be found on web address http://www.capi.org/pages/compliant.php
More information about the CAPI interface can be obtained from the official web site on http://www.capi.org/
CAPI works fine with the following platforms:
* DOS
* Windows 3.x, Windows 95, Windows 98, Windows ME
* Windows NT, Windows 2000, Windows XP
* Netware
* Linux
* UNIX (streams)
* BeOS
* OS/2
* Windows 3.x, Windows 95, Windows 98, Windows ME
* Windows NT, Windows 2000, Windows XP
* Netware
* Linux
* UNIX (streams)
* BeOS
* OS/2
Some of the CAPI features and functionalities are:
* Basic call control
* Supplementary Service control
* CTI support
* DTMF detection / generation
* Support for multiple applications
* Support for multiple ISDN-controllers
* Supplementary Service control
* CTI support
* DTMF detection / generation
* Support for multiple applications
* Support for multiple ISDN-controllers
Supported communication protocols:
* HDLC, HDLC inverted, SDLC
* X.75, X.25
* LAPD, X.31
* V.110, V.120
* T.30 (fax group 3)
* analog modem protocols
* PCM (speech)
* 56 kbit
* X.75, X.25
* LAPD, X.31
* V.110, V.120
* T.30 (fax group 3)
* analog modem protocols
* PCM (speech)
* 56 kbit
Supported national signaling protocols:
* Euro-ISDN (ETS 300 102)
* DSS-1 (Q.931)
* National ISDN 1 (NI-1)
* Northern Telekom ISDN (DMS-100)
* AT&T ISDN (5ESS)
* French ISDN (VN3)
* German ISDN (1TR6)
* DSS-2 (Q.2931)
* GSM
* DSS-1 (Q.931)
* National ISDN 1 (NI-1)
* Northern Telekom ISDN (DMS-100)
* AT&T ISDN (5ESS)
* French ISDN (VN3)
* German ISDN (1TR6)
* DSS-2 (Q.2931)
* GSM
Keep in mind that CAPI is not compliant with all the hardware products as well as all the applications. So, before using it, check out the list with the compliant hardware and applications supporting CAPI. The list can be found on web address http://www.capi.org/pages/compliant.php
More information about the CAPI interface can be obtained from the official web site on http://www.capi.org/
2. Chan_capi
Chan_capi is a module. Its purpose is to provide the connection between software based PBXs such as Asterisk and an ISDN hardware equipment which supports the CAPI interface.
The latest stable version (up to the date of this writing 14/12/2006) is 0.7.1. You could get it from the following FTP site - ftp://ftp.chan-capi.org/chan-capi.
You could download the source code by checking out the chan_capi repository. If you need the current stable branch, check out the repository by using the following command:
For the currently developed version, check out with:
If you need the latest release - 0.7.1, you hav to check out by typing:
NOTICE: Keep in mind that in order to perform the commands shown above, you will need to have the SUBVERSION client installed. It works on most of the known operating systems.
For more detailed description about how to get the SUBSCRIPTION client program, up and running for your platform, visit the official web page at http://subversion.tigris.org/project_packages.html
Chan_capi cannot be used with all ISDN cards. You need an ISDN card which supports CAPI. The list with chan_capi supported hardware can be viewed at the following web address - http://www.melware.org/ChanCapiHardware
There is one weak moment - the online documentation is incomplete, actually it is so small that it is almost missing. However the README file which is coming with the chan_capi package is clear enough and you should not have any problems. The only thing listed as documentation on the chan_capi web site is an error report explaining that although the message says error it is not an error.
However if you need help you could always take a look at the chan_capi mailing list. You could subscribe to it at http://lists.melware.net/mailman/listinfo/chan-capi-users
README
The latest stable version (up to the date of this writing 14/12/2006) is 0.7.1. You could get it from the following FTP site - ftp://ftp.chan-capi.org/chan-capi.
You could download the source code by checking out the chan_capi repository. If you need the current stable branch, check out the repository by using the following command:
# svn co svn://svn.chan-capi.org/chan-capi/branches/V0_7 chan-capi-branch-0.7
For the currently developed version, check out with:
# svn co svn://svn.chan-capi.org/chan-capi/trunk chan-capi-trunk
If you need the latest release - 0.7.1, you hav to check out by typing:
# svn co svn://svn.chan-capi.org/chan-capi/tags/V0_7_1 chan-capi-0.7.1
NOTICE: Keep in mind that in order to perform the commands shown above, you will need to have the SUBVERSION client installed. It works on most of the known operating systems.
For more detailed description about how to get the SUBSCRIPTION client program, up and running for your platform, visit the official web page at http://subversion.tigris.org/project_packages.html
Chan_capi cannot be used with all ISDN cards. You need an ISDN card which supports CAPI. The list with chan_capi supported hardware can be viewed at the following web address - http://www.melware.org/ChanCapiHardware
There is one weak moment - the online documentation is incomplete, actually it is so small that it is almost missing. However the README file which is coming with the chan_capi package is clear enough and you should not have any problems. The only thing listed as documentation on the chan_capi web site is an error report explaining that although the message says error it is not an error.
However if you need help you could always take a look at the chan_capi mailing list. You could subscribe to it at http://lists.melware.net/mailman/listinfo/chan-capi-users
README
http://lists.digium.com/pipermail/asterisk-users/2003-November/027741.html
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