Business Phone Lines

Save money and enjoy superior support for your existing Business Phone Lines. Our experienced team will ensure a smooth and seamless transition to our billing platform, planned and project managed through our established migration process.

"At a moment of critical need, with government implementing social distancing rules and others unable to deliver, you proved to be the most effective, understanding and pro-active organisations dealing with communication. The account manager listened, understood and helped in achieving what we wanted and in making sure that we would be able to continue to help the many vulnerable people accessing our service..."

Citizens Advice

ISDN Switch Off

ISDN Switch Off means that BT are upgrading all existing analogue lines to digital technology (Voice Over Internet Protocol/ VOIP), where all calls will be made using an internet connection instead, meaning that if you have these, your existing line(s) will be made redundant, so you will need to have your lines upgraded to continue operating with a phone system and some cases, door entry and CCTV systems.

SIP Phone Lines

SIP Trunk Lines are the current, like for like alternative to existing analogue lines. They offer much more flexibility, significant savings and built in business continuity. Your numbers are ported into the cloud which means you can point them anywhere you want, you can move offices and close offices down without losing important customers, the numbers are just pointed to the new location.

Benefits of SIP Trunks

Cavendish are proud partners of

SIP Call Manager

SIP Trunk Call Manager provides you with all the benefits of Gamma SIP Trunks together with a feature-rich, centralised call control platform.

It offers a powerful business continuity solution, giving you the ability to manage your number estate and all aspects of your inbound calls. Consolidate all your numbers into a single platform and never miss a call.