libosip2-15 5.3.0-2 (armhf binary) in ubuntu kinetic

 oSIP is an implementation of SIP.
 .
 SIP stands for the Session Initiation Protocol
 and is described by the RFC3261.
 This library aims to provide multimedia
 and telecom software developers
 an easy and powerful interface
 to initiate and control SIP based sessions in their applications.
 .
 SIP is the IETF replacement for the ITU's H323.
 Example programs using this library are partysip and linphone.