12.06.08 Asterisk Codec Negotiation Patch has been updated for Asterisk 1.4.20.x.
15.05.08 Asterisk Codec Negotiation Patch has been updated for Asterisk 1.4.19.x.
13.03.08 Asterisk Codec Negotiation Patch has been updated for Asterisk 1.4.18 and Asterisk Addons 1.4.6.
18.01.08 Asterisk Codec Negotiation Patch latest version has been updated to include fix for some issues.
17.01.08 Asterisk Codec Negotiation Patch has been updated for Asterisk 1.4.17/1.2.26.1
18.09.07 Advanced RADIUS B2BUA has been released. Documentation is to follow.
About Sippy B2BUA
Sippy B2BUA is a RFC3261-compliant Session Initiation Protocol (SIP) Back-to-back user agent (B2BUA) server software.
The B2BUA is a SIP call controlling component. Unlike a SIP proxy server, which only maintains transaction state, the B2BUA maintains complete call state and participates in all call requests. For this reason it can perform number of functions that are not possible to implement using SIP proxy, such as for example accurate call accounting, pre-paid rating and billing, fail over call routing etc. Unlike PBX-type solutions such as Asterisk for example, the B2BUA doesn't perform any media relaying or processing, therefore it doesn't introduce any additional packet loss, delay or jitter into the media path.
Logically, it consists of two independent signalling SIP UA connected by the call control logic.
Features
- 5,000-10,000 simultaneous sessions per server;
- 150-200 call setups/tear-downs per second;
- Realtime calls control and call data records (CDRs) generation;
- Optional ability to use Sippy RTPproxy for media relaying;
- Optional ability to perform Cisco-compatible RADIUS AAA (Authentication, Authorization and Accounting);
- RFC3261 compliance;
- Seamless compatibility with majority of popular SIP software and hardware on the market today;
- Robustness and Resilience;
- Simple and clean, yet flexible, internal design making implementing new features and services easy;
- B2BUA could be easily combined with other Open Source software, such as SIP Express Router to build complete softswitch solution.
History
The development of the software started at the late 2003 after negative experience with using Vovida B2BUA. It was designed with robustness and performance in mind and now being used by several hundreds ITSPs all around the globe. The software now is being actively developed and maintained by the Sippy Software, Inc.
Getting B2BUA
Currently, the B2BUA source code can be downloaded from the Berlios CVS using the following commands:
cvs -d:pserver:anonymous@cvs.sippy.berlios.de:/cvsroot/sippy login
When prompted for a password for anonymous, simply press the Enter key.
cvs -z3 -d:pserver:anonymous@cvs.sippy.berlios.de:/cvsroot/sippy co sippy
You can also browse the source code.
License
The Sippy B2BUA is distributed under version 2 of GNU Public License (GPL). You can find the full text of the license here. For a license to use the SIPPY software under conditions other than those described here, or to purchase support for this software, please contact Sippy Software, Inc.
Documentation
The B2BUA documentation is available here. Please note that it is still work in progress (last updated on 7 August 2008), please make sure to check for updates periodically.
Getting Help
You can obtain free best-effort help from the B2BUA community. To participate on the mailing list, subscribe at the following web address: http://lists.b2bua.org/mailman/listinfo/users and stick to problem reporting guidelines. Discussion of development, new features and B2BUA status as on CVS takes place at the following mailing list: http://lists.b2bua.org/mailman/listinfo/devel.
For a commercial support, including any custom development, please contact Sippy Software, Inc..
