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Gamma Horizon Hosted Telephony

A new age in hosted telephony systems

“We decided to dip our toes into the world of digital telephony with original VOIP system without expert knowledge which proved to be a challenge, however with the help of TSG and their specialist knowledge we now have a brand-new digital telephony service that works like clockwork, making it easy for us to work efficiently”
- Stephen, Commercial Manager, Construction

TSG is a Gamma Platinum Partner

We're delighted to have recently increased our accreditation with Gamma from Gold to Platinum - the highest partner accreditation possible. This means you can be assured that you're working with experts in Gamma solutions - whether that's hosted telephony or leased lines.

What is Gamma Horizon?

Offering a wide range of fixed line and mobile telephony capabilities, Gamma Horizon is a full-package business communication tool that can be utilised via an easy-to-use web portal.

This Gamma hosted phone system has a number of benefits including scalability, flexibility and cost savings.  

Why choose Hosted Telephony with Gamma Horizon?

  • Simple and futureproof

  • Disaster recovery-ready

  • Minimal capital expenditure

  • Truly mobile business

  • Potential for savings

  • Geography no longer a constraint

  • Fully managed service

  • Seamless migration

  • Ongoing support

Telephony in the cloud

With business-focused features including advanced administration and control, your IT team and customer team can banish the complication and burden of standard on-premise telephony.

Hosting your telephony in the cloud with Gamma Horizon means your employees can manage calls effectively maximising productivity.

Flexibility for any business

Gamma Horizon removes the jargon and unnecessary confusion with a minimal amount of capital required, which means it is suitable for businesses of any size that want to improve flexibility and productivity.

As Gamma Horizon is a cloud-based solution, there are no PBX maintenance costs. What's more, the solution fully integrates into a customer's mobile estate.


  • Complexity taken out of your voice system.

  • Fully managed service.

  • Fixed cost per user per month.

Flexible and Reliable

  • Available anytime, anywhere.

  • Single number reach.

  • Bring Your Own Device (BYOD).

  • Geographic boundaries removed.

  • Minimal downtime - none in our experience!

Disaster Recovery

  • No single point of failure.

  • Infrastructure in enterprise-grade datacentres.

  • Worst case – new location, new phones, same number, same configuration.


Standard features

All Gamma packages include the standard features of: User license, Polycom VVX411 or Yealink DECT phone, voicemail, auto-attendant, analogue line, assured or converged broadband service and support.

Horizon Package A

  • Fully managed and configured deployment

  • Polycom VVX410 or Yealink DECT phone

  • Hosted phone user license

  • Assured broadband service

  • Analogue telephone line

  • SystemCare support

Horizon Package B as Package A with:

  • 3x MACs per user per year

  • Fraud management

  • Free local or national calls

  • Ability to reduce estate by 10%

Horizon Package C - As Package A and B with:

  • Unlimited MACs (fully managed)

  • UK mobile calls included

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