Powerful, flexible business voice — built for the UK market

As a Gamma approved partner, CRE Communications delivers robust, scalable VoIP solutions tailored to British businesses. Whether you're moving from traditional ISDN lines or seeking a more professional setup for hybrid work, Gamma’s award-winning VoIP platform gives you advanced features, crystal-clear quality, and seamless reliability — all with local support and industry-leading uptime.

Why Choose Gamma Through CRE Communications?

UK-Built, UK-Based

Gamma’s cloud telephony network is designed for and hosted in the UK.

Future-Proof

With PSTN and ISDN switch-off on the horizon, Gamma VoIP is your

next-gen voice solution.

Hosted PBX & SIP Options

Choose from Gamma Horizon for fully hosted, or SIP

Trunking to upgrade your existing PBX.

Expert Setup & Support

CRE handles everything — planning, provisioning, training, and beyond.

Made for the Modern Business

Gamma's VoIP solutions are designed to meet the evolving needs of modern organisations.


Whether you're operating across multiple locations, enabling flexible working, or just want to improve the customer experience, Gamma Horizon and SIP Trunking offer a stable, smart, and secure platform to do it all.


Plus, Gamma’s UK-based infrastructure and support mean fast provisioning, low latency, and no overseas routing — perfect for businesses that want control and clarity without compromise.

Who Is It For?

  • SMEs replacing legacy ISDN or PSTN systems
  • Contact centres needing scalability and reliability
  • Remote teams requiring unified communications across devices
  • Growing businesses wanting cost savings with no service loss
  • Organisations that value UK hosting, support, and security

Key Benefits

High-definition

voice quality across all devices

Fully scalable

with no hardware limits or line rental

Advanced call

management tools IVRs, call queues, time-based routing

Secure & compliant

(ISO 27001 certified and GDPR ready)

FAQs

  • What’s the difference between Gamma Horizon and SIP Trunking?

    Gamma Horizon is a complete hosted PBX in the cloud — ideal if you’re moving away from

    traditional phone systems. SIP Trunking lets you keep your current PBX hardware while

    connecting it to Gamma’s network.

  • Can I use Gamma VoIP with my existing phones?

    In many cases, yes! We’ll assess your hardware and recommend compatible equipment or upgrades as needed.

  • Is this solution future-proof for the PSTN switch-off?

    Absolutely — Gamma VoIP is built as a direct replacement for PSTN and ISDN lines, making it a smart move now ahead of the 2025 switch-off.

  • Can I work from home or on the go?

    Yes. Gamma’s softphone apps and mobile integrations let you take and make calls from

    anywhere — just as if you were in the office.

  • How long does setup take?

    Most businesses are up and running within days. Our team will guide you every step of the way and minimise any disruption.

Full-Service Support from CRE

As your trusted telecoms partner, CRE Communications offers:


  • One-to-one consultation and solution design
  • Seamless onboarding and number porting
  • UK-based training for your team
  • Fast, ongoing technical support — with a real person


We also handle recycling of old phone systems and advise on sustainable equipment choices, helping you keep your business green.