The CommuniGate Pro SIP Module implements the SIP Internet protocols via IP networks.

The module is used to receive Signal Requests from remote entities, and to send Signals to remote entities.

The SIP protocol does not include the protocols required for actual data transfer (media transfer protocols). Instead, the SIP protocol allows all participating parties to find each other on the network, to negotiate the media transfer protocol(s) and protocol parameters, to establish interactive real-time sessions, and to manage those sessions: add new parties, close sessions, update session parameters, etc.