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SIP trunking

With BT’s planned ISDN switch-off, SIP Trunking provides a low cost and flexible alternative to traditional ISDN and PSTN landlines for on-premise phone systems. You can quickly connect SIP trunks and start making high quality, low-cost voice calls across the internet.

Compared to traditional ISDN lines SIP is less costly per channel and very quick to install. You can use it as your main voice connectivity or as a back-up to existing ISDN lines.

SIP is also incredibly flexible.  You can choose where you want calls to your phone number delivered, making SIP ideal for business continuity - if you have a site related issue just divert your inbound traffic away to another destination within minutes.

The business benefits

Reduce Costs

Save on call costs, rental charges, business continuity, calling and network features in comparison to a traditional fixed line service.

Quick to deploy

Add SIP trunks on a channel by channel basis to match your business need. Real-time provisioning means immediate service delivery.


Your phone numbers become geographically independent so you can take your numbers with you when you move premises.

Business Continuity

SIP can provide automatic failover to another site, ideal when you have on-site problems like power-cuts or loss of service.  It takes just a few minutes to re-route your calls to an alternative location.

Connectivity check

We provide expert advice and a wide range of business grade connectivity options to help you get the most from your SIP service. 

For more information and advice