Voice and Collaborative Working

Our voice solutions

  • Traditional Telephony – ISDN30, ISDN2, PSTN
  • Inbound numbers – 08xx, 03xx UK and International numbers. Call routing plans, IVRs, Wallboards, Real-time statistics, Web and App based customer control
  • SIP Trunking – customer base in excess of 34,000 channels carrying business critical voice
  • Microsoft Teams Voice – cloud hosted and on-premises
  • Contact Centre solutions – Fully scalable cloud-based including Horizon, Cirrus and Geomant
  • Cloud Hosted PBX – scalable from small to large enterprise
  • ISDN shutdown and replacement – solutions including replacement lines and voice overlay service

Our collaborative solutions

  • Unified Communications – On-Premise and Cloud-hosted including voice, email, messaged and presence
  • Cloud-based contact centre solutions, including Horizon
  • Web Conference – face to face virtual meetings, including chat, document sharing and video
  • More than 30,000,000 voice minutes carried every month
  • Vendor choice in networks and solutions
  • Over 30 years’ experience delivering for our customers
  • Trusted by Public Sector and Enterprise customers alike
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Case study

Kent County Council transition to Microsoft Teams Direct Routing from Gamma and Trustmarque

Kent County Council was using both the online and on-premise versions of Skype for Business, with approximately 5,000 users on each platform. The solution was approaching end of life at the end of July 2021 the Council knew they would have to quickly migrate all existing users to an alternative telephony solution. A decision had already been taken to migrate to Cloud Telephony in order to experience the commercial and operational benefit of removing any on-premise equipment

Discover how Trustmarque’s Enterprise Connectivity team and Kent County Council migrated 10,000 users to a simplified Teams telephony solution: Read the full case study

Kent County

“Migrating 5,000 users quickly and seamlessly was no mean feat. But Gamma and Trustmarque worked so well together, we felt that we were in safe hands. The project was executed quickly and efficiently, our telephony solutions are now simplified, and we can operate within a fixed budget.”

Stuart Cockett, Interim Head of Kent Public Services Network

Read the case study


Telephony users supported across the UK


Users enabled for MS Teams Direct Routing

1/3 billion

Calls delivered for clients each year

How Trustmarque’s solutions help

Our experts will work with you to develop and implement a strategy to help improve your business effectiveness and return on investment. We use the most innovative collaboration tools and technology solution providers available allowing us to offer unrivalled flexibility, deployment speed, intuitive adoption strategies and control of business intelligence.

Whatever your organisation’s long-term goal, whether it be voice enablement of Microsoft Teams or replacement of legacy telephone systems, Trustmarque is here to get the wheels in motion. Our long-standing partnerships give us access to industry-leading solutions meaning we can help your business maintain and grow a competitive edge.

During the project lifecycle, we will guide you from strategic planning through to design, implementation, management and support. We’ll ensure you minimise risk and get the most from your communication and collaboration tools.

Microsoft Gold Partner
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