SIP and SIP Trunking Explained: The Backbone of Modern VoIP

Demystifying SIP and SIP Trunking. Understand how these technologies replace traditional phone lines to provide better quality and lower costs.

If you are moving to the cloud, you will hear the terms "SIP" and "SIP Trunking" thrown around. But what do they actually mean for your business?

What is SIP?

SIP (Session Initiation Protocol) is the standard protocol used to initiate, maintain, and terminate real-time sessions that include voice, video and messaging applications.

What is a SIP Trunk?

A SIP Trunk is the virtual version of an analog phone line. Using your internet connection, a SIP trunk connects your PBX (Private Branch Exchange) to the PSTN (Public Switched Telephone Network).

Why Switch to SIP Trunking?

• Cost Savings: Eliminate expensive PRI/ISDN hardware and maintenance fees.
• Scalability: Add new channels/lines instantly without waiting for a technician to install physical wires.
• Reliability: SIP trunks are location-independent. If your office loses power, calls can automatically reroute to mobile devices or another branch.

CallPlus utilizes premium Tier-1 SIP providers to ensure crystal-clear voice quality and low latency for all your calls.