Binary package “openser” in ubuntu lucid

very fast and configurable SIP proxy

 OpenSER is a very fast and flexible SIP (RFC3261)
 proxy server. Written entirely in C, OpenSER can handle thousands calls
 per second even on low-budget hardware.
 .
 C Shell-like scripting language provides full control over the server's
 behaviour. Its modular architecture allows only required functionality to be
 loaded.
 .
 Among others, the following modules are available: digest authentication, CPL
 scripts, instant messaging, MySQL support, presence agent, RADIUS
 authentication, record routing, SMS gateway, Jabber/XMPP gateway, transaction
 module, registrar and user location, XML-RPC interface.
 .
 This package contains the main OpenSER binary along with the principal modules
 and support binaries.