sitsotd, a scalable SIP router

the sitsotd project aims to build a highly scalable SIP/SIP gateway to allow multiple asterisk servers to share a common load, avoiding the NAT problems and RTP bridging scalability problems known with proxies such SER and MediaGateway.

The idea is to utilise the packet routing/mangling functionality in the Linux kernel with IP Tables and userspace packet mangling to allow for building smart routing of calls to multiple SIP/PSTN gateways behind the box.

See website for a further explaination

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