# SIP
> A signaling protocol used to establish, manage, and terminate multimedia communication sessions like voice and video calls over the internet

SIP (Session Initiation Protocol) is the signaling standard used to establish, manage, and terminate VoIP call sessions.

## What is SIP?
Session Initiation Protocol (SIP) is a protocol used in VoIP platforms to initiate and manage call sessions. SIP is considered a call initiation protocol.

SIP technology also enables [SIP trunking](/blog/sip/what-is-sip-trunking-benefits/), a service that allows on-premise PBX networks to connect to VoIP services for outbound calls rather than being restricted to traditional telephony networks.

For a more in-depth look, check out: [What is SIP Communication? Everything You Need to Know](/blog/sip/what-is-session-initiation-protocol-sip-guide/)

## Related Terms
- [5G](/voip-glossary/5g/)