SIP Trunking
Made Simple
Swap your dated phone lines for a flexible, cloud-based connection that bills by the minute. SIP Trunking links your business to the world over the internet, so you spend less and gain reliability.
On-premise or Cloud Phone System
PSTN / Mobile / Landlines
What is a SIP Trunk?
SIP (Session Initiation Protocol) is the common standard for setting up voice and video connections across a data network. Think of a SIP Trunk as a virtual stand-in for an analog phone line.
Where traditional ISDN/PRI lines need physical copper wiring run into your office, a SIP trunk rides on the internet connection you already pay for. That lets you join your Private Branch Exchange (PBX) to the Public Switched Telephone Network (PSTN) with no hardware limits.
Two-Way Calling
Carries inbound and outbound calls at the same time.
Elastic Capacity
Spin up unlimited channels in seconds when traffic spikes.
Encrypted Transport
Calls stay protected with TLS and SRTP protocols.
Hardware Agnostic
Runs with IP-PBX, softphones, and legacy systems (via gateways).
SIP Trunking vs. Traditional ISDN/PRI
The reasons companies are moving to SIP to spend less.
| Feature | SIP Trunking | ISDN / PRI |
|---|---|---|
| Setup Time | Instant (Minutes) | Weeks or Months |
| Cost Structure | Pay-per-channel or minute | Expensive fixed monthly rental |
| Scalability | Unlimited, Instant | Limited to 23/30 channels per wire |
| Hardware | None (Virtual) | Physical Cards & Wiring |
| Location | Work from anywhere | Tied to physical office |
| Redundancy | Auto-failover to mobile/cloud | Line down = No calls |
Why Your Business Should Run On
SIP Trunking
Cheaper calls are only the start. The real payoff is a communications backbone that scales right alongside your business.
Up to 60% Lower Costs
Cut pricey line rentals and bring international call rates way down.
Worldwide Reach
Provision US/Canada digital numbers in seconds, no physical offices required.
All Channels, One Network
Run voice, video, and messaging across a single network backbone.
Intercalling SIP Highlights
SIP Questions People Ask Most
Will I have to replace my current PBX?
Rarely. A modern IP-PBX (such as Asterisk, 3CX, or Avaya IP Office) handles SIP natively. For an older analog PBX, a VoIP Gateway device converts the SIP signal to analog, so your existing hardware keeps earning its keep.
How much bandwidth does a SIP trunk use?
A standard uncompressed call on the G.711 codec needs roughly 85-100 kbps in each direction (upload and download). We also run the Opus codec, which delivers HD quality at lower bitrates and adapts to your network conditions.
Is SIP Trunking safe to use?
Yes, as long as it is set up properly. Intercalling encrypts signaling with TLS (Transport Layer Security) and locks down the audio media with SRTP (Secure Real-time Transport Protocol), which keeps eavesdroppers out.
What if my internet connection drops?
This is where SIP really shines. We can set up automatic failover forwarding for you. The moment your office internet drops, calls reroute on the spot to mobile phones, another office, or a cloud-based voicemail system.
Ready to cut your phone bill?
Enterprise-grade SIP trunking, billed pay as you go with no surprises.
Call from any browser
No app and no SIM. Place the call from your computer or phone in seconds.
Low rates to 190+ destinations
Clear per minute pricing, shown before you dial. Pay as you go, no monthly fee.
One balance, every device
Start on your laptop, continue on your phone, all at the same low rate.