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SIP is the next generation protocol for Voice Over IP. The SIP standard has been developed by the IETF.
isdngw is an application module for SEMS, the SIP EXpress Media Server. isdngw implements PSTN connectivity for SIP.
It supports connections from SIP to the PSTN and from PSTN to SIP.
You need a Linux box with a supported ISDN controller installed.
For a quick start, please view the Installation Guide.
isdngw is included in SEMS. Please review the download page for details on how to get all required software components.
You can get support from the SEMS Mailinglist, there is also commercial support available from iptel.org. Please see the support page for details.
isdngw is made available under the terms of the GNU General Public License.
Code contributions are welcome, please send a patch against latest CVS version. Also any information about ISDN controller compatibility is highly appreciated.
isdngw has been written by Ulrich Abend as part of his diploma thesis at the Technical University in Berlin.