voip full form

What is voip full form?

Voip stands for  voice communication over Internet Protocol.   It is the group of technologies  which provides voice and multimedia session over IP network. The full form of Voip is Voice Over Internet Protocol (IP).  IP telephony is relatively new communication system for voice.  In legacy telecom network SS7 protocol is the network, which consists of voice over E1/T1 TDM trunks.  The telephone exchanges are connected to each other via ss7 trunks.  Each trunks have multiple voice channels. In voip exchanges are connected to each other over IP network.  SIP trunks connects telephone exchanges.

SIP or Session Initiation Protocol is the signaling protocol for setup a voice session. Even it have more functionalities than just setup voice , Fax, Video calls etc.  For actual voice packets RTP protocol is used.  To setup a media session over IP,  SIP Session setup message (INVITE) , carries media session information in payload. SDP or session description protocol defines the properties and parameters for actual voice session. One a signaling is done for voice/media actual data packets flows. To terminate a session any end can close. SIP BYE message is used to terminate a ongoing session.

Voip opens new business models. The business is easy to start. One can be re seller of voice routes, Virtual Numbers etc.  With IP telephone now is easy to connect with mobile operators for new services. This enables value added service providers (VAS), to deploy new voice based services easily and quickly.

The full form is Voice over Ip. So all communication is over IP network. This enables to use already deployed IP network capabilities.  An IP network uses DNS servers, switches , routers etc.  Along with IP , SIP protocol uses UDP over  IP.