SER

From SubmitYourSIP

SER is a high performance [open source] SIP server. There are a couple of forks (Kamailio, OpenSIPS) based off SER.

Major features:

• Can be a proxy, registrar, or redirect server
• UDP, TCP, and TLS support
• Supports IPv4 and IPv6
• Support for various DB backends
• Powerful programming features - AVPs, psuedo-variables, etc
• High performance