"SIP Express Router (SER) is a high-performance, configurable, free SIP server . It can act as SIP registrar, proxy or redirect server. SER features an application-server interface, presence support, SMS gateway, SIMPLE2Jabber gateway, RADIUSi/syslog accounting and authorization, server status monitoring, FCP security, etc. Web-based user provisioning, serweb, available.
Its performance allows it to deal with operational burdens, such as broken network components, attacks, power-up reboots and rapidly growing user population. SER's configuration ability meets needs of a whole range of scenarios including small-office use, enterprise PBXi replacements and carrier services."
SER is an open source-based proxy of high performance that is a signaling proxy that re-codes the signaling string and then redirects to the appropriate source.
SER is an easily configurable and free SIP server. It accomplished three main objectives. It acts as a SIP registrar, a SIP proxy and a SIP redirect server. Its performance allows it to deal with operational issues such as broken links, broken gateways, and re-invites
For More Information on open-source configurations:
Features:
•SIP Register server
•Location server
•Proxy server
•Redirect server
•Support for UDP and TCP
•NAT-Traversal
•Load Balancing
•Least cost routing
•Billing
•Logging
