A SIP Trunk is the connection that links your phone system to the public telephone network over the internet, instead of physical lines. It is the modern way to make and receive calls.
How it works
Instead of contracting physical lines or trunks (E1, analog), the SIP Trunk carries calls as data over the internet using the SIP protocol. Your PBX —physical, virtual or cloud— connects to the provider, and phone traffic flows in and out from there.
Advantages over traditional lines
- Savings: removes physical lines and lowers national and international call costs.
- Scalability: add or remove channels on demand, with no physical work.
- Flexible numbers: local numbers from several areas and toll-free, no matter where your office is.
- Continuity: with managed routes and failover, calls keep flowing even if a link fails.
Who a SIP Trunk is for
It is ideal if you already have a PBX (for example FreePBX/Asterisk or an IP-PBX) and want to modernize connectivity without changing your whole system. If instead you want a complete no-hardware solution, consider UCaaS.
See the details on our SIP Trunk page.
Frequently asked questions
Does it work with my current PBX?
Yes. The SIP Trunk connects to physical, virtual or cloud PBXs that support SIP.
How many simultaneous calls does it support?
As many as you need: defined by channels and scaled to your traffic.
Can I have numbers from other countries?
Subject to availability, yes; local and toll-free numbers from different areas can be enabled.