SIP Trunking

Session Initiation Protocol.

SIP Trunking is a clever alternative to a standard ISDN telephone line that allows you to transmit voice data over your existing internet connection, saving you money on your phone bills. What is more, you can usually use your pre-existing telephony system and handsets.

Starting in 2020, BT will notify customers of their phased withdrawal of ISDN phone lines. Connection of new services is expected to cease by 2023, and all services stopped by 2025.

Our SIP Trunking, offers exceptional reliability and resilience. And our business-only voice dedicated network means that your connection is never shared with consumer internet traffic. Monthly line rental is low and you can make internal UK landline calls for free. There’s also competitive rates for calls to mobiles.

SIP trunking means you can keep the same geographical numbers, so if your business moves because of an office relocation or has to move temporarily because of fire or flood, business continuity can be assured. You can also allocate geographic numbers from any UK region, giving your business added appeal in the particular areas you want to target. SIP trunking can be set up in as little as 10 minutes.



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