Session Initiation Protocol (SIP) library

 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.