Session Initiation Protocol (SIP) is a simple application layer signalling protocol for VoIP implementations. It is a textual client-server based protocol and provides the necessary mechanisms so that an end user systems and proxy servers can provide various different services.

SIP addresses (URI) can be embedded in Web pages and therefore can be integrated as part of powerful implementations (Click to talk, for example).  SIP provides the market with fast operation, flexibility, scalability and multiservice support.

SIP provides its own reliability mechanism and creates, modifies and terminates sessions with one or more participants. These sessions include IP multimedia conferences, IP telephone calls and multimedia distribution. Members in a session can communicate using multicast or using a mesh of unicast relations, or a combination of these. SIP is designed to be independent of the lower-layer transport protocol and can be extended with additional capabilities and services .

RADCOM's support for SIP includes:

1.  The SIPSim – a SIP services simulator, which presents a sophisticated range of applications for  high-stress load-testing of any SIP application.

2. The MediaPro - a VoIP analysis tool, capable of performing countless VoIP and IP-Video measurements such as MOS, PMOS, PESQ, VoIP quality measurements and call quality analysis.