SIP Trunking is a technology that enables the transmission of voice and multimedia content over the Internet using the Session Initiation Protocol (SIP). This system allows businesses to replace traditional phone lines with high-speed Internet connections, thus facilitating efficient communication and significant cost savings. Here’s a detailed overview of SIP trunking, including its components, benefits, working principles, and use cases.
Sip Trunk
How Sip Trunk Works
- Connection Setup: The PBX system establishes a connection with the VoIP service provider using SIP, allowing users to send and receive calls over the Internet.
- Call Establishment: When a user makes a call, the PBX sends a SIP request to the SIP trunk, which is routed through the service provider to establish the connection with the receiving party.
- Media Transmission: Once the connection is established, voice packets are transmitted over the Internet using various codecs (like G.711, G.729), ensuring high-quality audio.
- Call Termination: When the call is completed, the SIP signaling terminates the connection, releasing the resources in the SIP trunk.