Unified Communications Platform. UCaaS Solutions

Unified Communications Platform. UCaaS Solutions

Enterprise voice that doesn’t go down

UC3 is FourNet’s own cloud communications platform, built for organisations where voice is mission-critical.

It runs on resilient SIP architecture across dual, geographically separate UK data centres, with all data kept in the UK and availability engineered up to five nines (99.999%).

That reliability is what lets you run customer-facing and mission-critical voice with confidence, bring voice, video, messaging and meetings into one place, and add AI and collaboration on top safely.

Speak to a UC3 Specialist Explore Digital Workplace & Collaboration

When Voice Cannot Fail

Many organisations still rely on fragmented telephony estates – legacy PBXs, ageing SIP contracts, unsupported hardware and undocumented configurations. PSTN replacement has accelerated change, but rapid migrations introduce operational risk. 

Voice is not disappearing. It remains central to frontline services, field operations, safeguarding, and customer engagement. For regulated organisations, dropped calls or unavailable services carry reputational, operational and political consequences. UC3 was designed for environments where availability, governance and migration safety matter as much as functionality. The PSTN switch-off completes on 31 January 2027, every legacy line has to move to IP before then. The risk isn’t the move itself; it’s a rushed migration on a platform that wasn’t built to stay up.

What UC3 is

UC3 is FourNet’s own UK-hosted cloud communications platform. It brings voice, video, messaging, meetings and service-centre into one governed service, with resilient SIP, recording and lifecycle management built in, and Microsoft Teams Direct Routing and CX platforms such as CXone integrated where you need them. A self-service domain hierarchy lets a central team manage many sites under one umbrella, with per-site control where it’s needed.

Why it Exists

We built UC3 to solve three recurring problems:

  • Uncontrolled estates with inconsistent configuration

    UC3 standardises dial plans, numbering, call flows, policies and security controls so sites don't drift into one-off fixes. You get repeatable deployment patterns, clear documentation and change discipline – reducing faults, support overhead and audit risk.

  • Migrations that introduce instability

    UC3 uses staged cutover plans, defined test packs and rollback options to protect live calling. We baseline what you have, migrate in controlled waves, and run hypercare with measured KPIs – so service levels hold while users transition.

  • Cloud telephony deployed without proper resilience design

    UC3 designs resilience in from day one: multi-site routing, carrier diversity, survivability options, recording continuity and monitored failover. The platform is governed and continuously tested, so "cloud" doesn't become a single point of failure.

Operational outcomes from a controlled UC platform

UC3 is designed for environments where voice cannot fail. Resilience is built into the architecture through geographic diversity, failover routing and continuous monitoring.

  • Maximum availability architecture (5×9s)

    Up to 99.999%

  • SIP routing and infrastructure

    Built-in resilience

The UC3 Architecure

UC3 combines several controlled layers:

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  • Enterprise Cloud Telephony

    Hosted, managed voice services designed for distributed and multi-site estates.

  • Resilient SIP Trunking

    Geographically diverse SIP routing with failover controls and structured number management.

  • Call Recording & Compliance Controls

    Integrated recording aligned to regulatory obligations and retention policies.

  • Integration Layer

    Direct routing into Microsoft Teams Voice, connectivity to CX platforms including CXone, and alignment with secure network architecture.

  • Managed Service Governance

    Structured service delivery, reporting, performance reviews and lifecycle optimisation.
    This architecture ensures voice is not deployed as an isolated technology decision but as part of a governed operating model.

Build a Voice Platform You Can Rely On

UC3 provides resilient, governed cloud communications for organisations where voice is operationally critical. Speak to FourNet about modernising your telephony estate safely and sustainably.

Our Approach

  • Discovery

    Discuss your challenges and goals with us.

  • Analysis

    Thorough examination of your current systems.

  • Roadmap

    Tailored strategy for a secure customer experience.

"FourNet's customer experience consulting has revolutionized our approach. Their team's knowledge and commitment are unmatched."
Elias Thorne, CEO, Innovative Solutions Inc.

If you’re already a client, please call us at 0845 055 6366 or email hi@fournet.co.uk.

Hosting Options Aligned To Risk

UC3 runs on FourNet’s own UK infrastructure, so you choose the hosting tier that matches your risk, not a one-size default.

  • Agile Cloud

    FourNet-owned, resilient UK hosting for high-availability enterprise voice.

    Explore Agile Cloud

  • ANTENNA

    Government-grade UK hosting for the highest availability and sovereignty tiers, where five-nines and classification matter.

    Explore ANTENNA

  • Public-cloud integration and hybrid models

    All data stays in the UK, across dual geographically separate data centres. We design the tier around your availability, sovereignty and regulatory requirements.

How UC3 Connects to the Wider FourNet Portfolio

UC3 sits on the same secure foundation as the rest of your estate — cyber, network and AI under one accountable partner, with no seam between the network, the security and the voice that runs on it.
Secure Connectivity & Cloud Cybersecurity & Resilience Teams Voice & Migration

What Makes UC3 Different

  • Built for Complex Estates

    UC3 was designed around large, distributed organisations – not small-office telephony. 

  • Resilience as a Foundation

    High availability is engineered into the architecture, not added as an upgrade. 

  • Structured Migration Governance

    Number porting, SIP rationalisation and estate consolidation follow controlled processes to reduce disruption. 

  • Operate and Improve Model

    Post go-live governance ensures optimisation continues through reporting, service reviews and adoption monitoring. 

  • Built for multi-site estates, including schools and trusts.

    UC3's domain hierarchy lets a central team run many sites under one umbrella, with per-site control where it's needed, and a dedicated schools offer for education estates moving off legacy lines ahead of the PSTN switch-off.

  • Where UC3 adds AI

    Transcription, sentiment and summaries – it's governed the same way as everything else: explainable, logged and human-overseen.

Frequently Asked Questions

  • Is UC3 a standalone product or a managed platform? 

    UC3 is a managed cloud communications platform. It combines hosted telephony, SIP trunking, governance and lifecycle management within a structured service model.

  • Can UC3 integrate with Microsoft Teams? 

    Yes. UC3 supports Direct Routing into Microsoft Teams, allowing organisations to maintain resilient SIP architecture while enabling Teams-based calling experiences. 

  • How resilient is UC3? 

    Architecture can be designed to support availability levels up to 99.999%, depending on deployment model and hosting tier. Geographic diversity and failover are built into the platform design. 

  • Can we migrate gradually from our legacy estate? 

    Yes. We support phased migration strategies, including parallel running and staged number porting to reduce operational risk. 

  • Does UC3 include call recording? 

    Yes. Recording capabilities can be embedded as part of the platform and aligned to sector-specific compliance and retention policies. 

  • What happens after deployment? 

    Structured Service Delivery Management and Customer Success oversight ensure performance is reviewed regularly, optimisation opportunities are identified, and governance remains strong.