Business Telephony


Getting the right phone system for your business can make a huge difference to your productivity, your customer service levels and your bottom line. It’s about making sure your people – clients and staff alike – can get through to the right place as quickly as possible, every time.


At CMC, we do our homework and get to know your business properly before we recommend a phone system. We do a suitability check, looking at how you currently operate, the call volumes you currently handle, where the connectivity issues might be and how you might grow in the future.

Cost Effective

We specialise in the implementation and support of VoIP phone systems and are an approved partner of Gamma and Microsoft. VoIP technology is known to be more flexible, feature-rich, reliable and cost-effective than traditional BT landlines. It’s clever tech, designed to help your business connect more effectively. Let us show you how.

Business Telephony

Gamma Horizon

Complete solution

We provide everything from handset to access to core network. This means you’ll never get caught in the middle between your voice provider and your data provider, which will save you and your customers both time and hassle.

True fixed / mobile-converged solution

Improves interoperability between mobiles and fixed telephones with extremely competitive on-net rates over a business grade network.


We provide full support including training, number porting, provisioning and 24/7 UK-based assistance giving you complete peace of mind.


This includes the addition of new features, upgrades to existing features and optional integration with third-party applications. Product development is managed by our in-house team and we actively seek input from our Channel Partners when it comes to discovering new ways to keep Horizon at the forefront of hosted IP telephony.

Microsoft Teams

Free calls, enhanced call control features and carrier grade infrastructure. Maximise value from your Teams environment.

Microsoft Teams Direct Routing is the flexible, accessible and cost-effective alternative to Microsoft Calling Plans allowing you to make and receive calls external to your business from Microsoft Teams.

Gamma has built a bespoke Direct Routing architecture to enable full voice capability natively into Microsoft Teams.

Any company using Microsoft 365 and Microsoft Teams as their unified communications tool can implement Direct Routing for Microsoft Teams from Gamma as their preferred provider for voice and benefit from cost savings, increased functionality and support for migration.

We provide full support including training, number porting, provisioning and 24/7 UK-based assistance giving you complete peace of mind.

Gamma Technical Alliance Partner logo
Microsoft 365