Projects

rtpproxy

The Sippy RTPproxy is a high-performance software proxy for RTP streams that can work together with SIP Express Router (SER), OpenSER or Sippy B2BUA. Originally created for handling NAT scenarious it can also act as a generic media relay as well as gateway RTP sessions between IPv4 and IPv6 ... [More] networks. RTPproxy was developed by Maxim Sobolev and now is being actively maintained by the Sippy Software, Inc. The RTPproxy supports some advanced features, such as remote control mode, allowing building scalable distributed SIP VoIP networks. The nathelper module included into the SIP Express Router (SER) or OpenSER as well Sippy B2BUA allow using multiple RTPproxy instances running on remote machines for fault-tolerance and load-balancing purposes. [Less]

Sippy SIP B2BUA

Sippy B2BUA is a RFC3261-compliant SIP Back-to-back user agent (B2BUA). 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 ... [More] 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. Sippy B2BUA supports RADIUS AAA protocol, which is compatible with Cisco VoIP gateways allowing it to be seamlessly integrated into existing networks. [Less]

SIP Callback Daemon

Simple SIP callback application built on top of sippy/twisted.

SIP Registrar Agent

A SIP registrar agent - it just registers on remote SIP servers and substitutes your desired SIP URI as contact for these remote registers. Thus all calls to remote SIP servers will be redirected to your desired SIP URI.

ultrasippy

sippy expand