A seamless migration from a traditional phone system to a cloud communication system or enterprise-wide communications platform can be a daunting task. Black Box engineers and solution architects make it easy. As a leader in UC&C – with a robust portfolio of solutions from leading technology partners, full-circle IT services, a global presence, and local, certified teams – Black Box can help you determine the consumption model that works best for you and aligns with your business drivers. Designed to help businesses meet the demand for omnichannel collaboration, our solutions give you, your employees, and your customers the tools you need to stay connected anytime, anywhere.

  • Flexible solutions: designed to adapt to the changing needs of our customers.
  • Collaborative culture: we work with specialist experts in business communications to deliver the right solutions and ongoing support for our customers.
  • Connected communications: dependable and secure unified communications designed to help businesses succeed.
  • End-to-end control: for 'Always on' unified communications that provide the freedom to work wherever, whenever.

Talk to us about your Enterprise Telephony needs!

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LIVE WEBINAR: Prepare Your Business for the Big Switch Off


Future-Proof Business Communications with SIP Trunking

Watch our on-demand webinar with Gamma, the UK's leading SIP provider, and gain valuable insights on navigating the PSTN/ISDN Switch Off and preparing your business communications for an all-IP future.

  • Implications and urgency of the PSTN/ISDN Switch Off
  • Benefits of SIP Trunking, including flexibility, scalability, and cost savings
  • Real-world insights through success stories
  • Best practices for a smooth transition

Watch Webinar


Don't let inflexible and costly inbound/outbound voice call services impact your business. SIP is a reliable and flexible alternative to rigid, expensive ISDN solutions. SIP Trunking provides business-grade voice quality and powerful business continuity and inbound call management features, at a lower cost per channel than ISDN.

Save money
Experience savings of up to 50% in comparison to traditional or legacy options, such as ISDN. Plus you can also reduce the maintenance costs of your PBXs and benefit from free calls within the UK.

Be reassured that SIP trunking can be used with existing ISDN connections to ensure that any transition is frictionless.

Built-in business continuity
SIP trunks can handle emergencies in an instant by rerouting calls quickly and easily. It's also instantly scalable, so you can add and remove them as required with no fuss.

Business-grade call quality
You'll get the kind of crystal-clear call quality you'd expect from the UK's market leader in SIP Trunking and you can be reassured by 24/7/365, direct support when you need it.

SIP Trunking >>
PSTN/ISDN 2025 Switch Off: Migration to SIP >>



Businesses need the ability to respond quickly to their customers across multiple channels. Arm your business with a unified communications solution, designed by the UK market leaders, to improve productivity and increase collaborative working.

Complete solution
Consolidate your business communications onto a single platform. An easy-to-manage voice, video, messaging, and file sharing solution which gives you total flexibility and complete visibility.

Future-ready technology
A solution that changes with your business needs. Get new capabilities as they become available. A versatile choice made for enabling new integrations quickly.

Flexible and scalable
Upscale and downscale to meet business needs. The ability to make these changes in an instant will reduce costs, keep you prepared for busy periods and ensure you don't pay for more than you need.

Microsoft Teams with Direct Routing >>


Full-Circle IT Services

With more than 45 years experience in deploying in-building IT and communications technologies, a footprint that spans 120 countries, time-tested methodologies, certified technicians, and a proven track record, we have all the IT services needed to make your move to cloud communications smooth and successful.


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Work quickly to identify needs and outline a plan of action. Contact a Black Box expert today.