SER is the acronym of SIP express Router. It can act as SIP registrar, proxy or redirect server. The official website with information and sources for download is http://www.iptel.org/
It has high-performance, and can be configured and modified because is open source. SER features an application-server interface, presence support, SMS gateway, SIMPLE2Jabber gateway, RADIUS/syslog accounting and authorization, server status monitoring. And can be configured by web using databases.
Its performance let it deal with operational burdens, such as broken network components, attacks, power-up reboots and rapidly growing user population.
It can work simultaneously with IPv4 e IPv6 in a transparent way given connectivity for both protocols. Its functionality and management is easier using MySQL modules.
SER's configuration ability meets needs of a whole range of scenarios including small-office use, enterprise PBX replacements and carrier services.