Zero-Downtime Transformation:
How 444Video Helped Comux UK Relocate and Streamline Its Broadcast Infrastructure
Comux UK operates the UK’s Local TV multiplex, delivering 34 local TV services and 4 national TV streams from its Birmingham Network Operations Centre.
Comux faced a mandatory relocation and needed to upgrade legacy systems within tight time constraints. This required a full infrastructure transformation with no downtime, prioritising cost reduction and simplicity.
444Video was engaged to lead the transformation, redesigning the architecture end-to-end.
What followed was more than a migration. It was a complete architectural rethink that turned a legacy broadcast environment into a leaner, simpler, and more cost-efficient model.
“This was a complex move with no margin for error - and 444Video made it possible.”
Michael Lever, CEO, Comux UK
At a Glance
Goal
Relocate infrastructure within a fixed timeframe
Maintain continuous broadcast during migration
Reduce operational cost and complexity
Challenge
Mandatory infrastructure relocation
Transition from legacy SDI to IP-based architecture
Zero tolerance for downtime during migration
Manual monitoring and limited operational visibility
Solution
Infrastructure consolidation and architecture redesign
Implement automated monitoring and NOC capability
Enable remote operations and resilience
Key Results
£500k annual savings
~50% reduction in operational costs
~70% smaller footprint
Zero live broadcast disruption
Reduced supplier complexity
Fully remote proactive operations
“The system had to move — but it couldn’t go down.”
Mark Couto, Technology Lead, 444Video
The Challenge
Three Critical Constraints, One High-Stakes Delivery Window
Relocating a full broadcast environment while maintaining continuous service created a uniquely complex technical challenge. Comux’s legacy SDI system was costly, difficult to scale, and heavily dependent on manual oversight.
The organisation needed to:
Reduce cost
Increase efficiency
Maintain uninterrupted service
All under a strict delivery window.
The Solution
A Three-Phase Transformation Designed to Reduce Risk at Every Stage
444Video re-architected the environment through a structured delivery model, combining infrastructure consolidation, automated monitoring, and remote operational resilience.
444Video designed the project as a structured transformation, applying deep expertise in UK DTT infrastructure and enterprise IT tooling to deliver a 3-phase approach that reduced risk and ensured long-term operational resilience.
“They were extremely organised, thorough, and communicative throughout. It gave us real confidence that such a complex transition was under control.”
Michael Lever, CEO, Comux UK
Phase 1: Migration & Consolidation
The Physical Move - Rebuilding the foundation without disruption
444Video managed the migration and architectural redesign, executing a carefully staged cutover strategy.
Rather than replicating the existing environment, the team re-engineered the infrastructure to meet both operational and financial objectives over a strict 3-month window.
The consolidation was significant:
From 10 racks to 3 in a new managed facility
Transition from SDI-based systems to a fully IP-native architecture
Optimisation of compressed transport streams to enable a streamlined delivery model
A secondary site was fully integrated and broadcasting before the original was decommissioned, ensuring no interruption to live services.
This approach, combined with coordination across key stakeholders and network providers, enabled a zero-disruption migration within 3 months – a record for a project of this complexity involving live broadcast transmission.
“They handled everything from network design through to software development. It wasn’t just a migration - it was a complete technical solution.”
Michael Lever, CEO, Comux UK
Phase 2: Automation & Visibility
The NOC Build-Out - From manual monitoring to proactive management
With the physical migration complete, the focus shifted to operational performance.
A key limitation in the legacy environment was manual monitoring and processes.
444Video addressed this by designing and deploying a remote Network Operations Centre (NOC).
This included:
Clustered monitoring
Real-time telemetry
Slack-integrated alerts
A single-pane operational view
Automated alerting replaced manual monitoring, with intelligent triggers proactively detecting issues, enabling faster response times and reducing reliance on human intervention.
A full audit of legacy equipment enabled the decommissioning and resale of redundant hardware, improving cost efficiency.
Phase 3: Remote Operations & Resilience
The 24/7 Safety Net - Enabling a flexible, future-ready operating model
With monitoring and visibility established, the final phase improved resilience and operational flexibility.
444Video introduced a fully remote management model, allowing engineers to monitor and manage the system from any location.
This was supported by an integrated support ecosystem, including:
Proactive Slack alerting for real-time notifications
Automated phone escalation for critical incidents
Direct access to specialist engineers when needed
444Video implemented a hot spares strategy to ensure resilience.
Critical hardware components were pre-configured and ready for immediate failover, ensuring continuity in the event of a failure.
Over time, 444Video’s role evolved into ongoing technical oversight, acting as a central engineering partner across:
Network health monitoring
Incident response
Service improvements
New channel launches
“It meant I didn’t have to be heavily involved in the technical detail — which, for a project like this, was incredibly valuable.”
Michael Lever, CEO, Comux UK
The Results
Delivering Measurable Impact Across Cost, Performance, and Operations
The transformation reduced costs, improved visibility, and enabled a more scalable broadcast model without disrupting live services.
The impact was immediate and measurable:
£500k annual cost savings
~50% reduction in operational costs
~70% reduction in infrastructure footprint
Zero disruption to live broadcast services
Fully remote operational capability
The new architecture is leaner, easier to manage, and built for long-term adaptability.
From manual to automated monitoring
From fixed infrastructure to scalable architecture
From site-based operations to remote management
“It’s made the operation much leaner and simpler to manage, which reduces complexity across the business.”
Michael Lever, CEO, Comux UK
About Comux UK
Comux UK is the operator of the UK’s Local TV multiplex, responsible for delivering local television services across 34 regions nationwide and 4 national TV streams from its Network Operations Centre in Birmingham.
Established as a not-for-profit organisation, Comux was created to support the growth and sustainability of local television in the UK. It provides the infrastructure and distribution network that enables local broadcasters to reach audiences via Digital Terrestrial Television (DTT).
Operating within a rapidly evolving broadcast landscape, Comux plays a critical role in maintaining reliable, high-quality transmission while adapting to changing technologies, viewing habits, and commercial pressures.
About 444Video
444Video specialises in building bespoke, integrated broadcast solutions by combining enterprise-grade systems with deep domain expertise.
Their approach focuses on:
Real-time telemetry and monitoring
Automation of complex workflows
Scalable, IP-based infrastructure design
By blending broadcast engineering and agile principles, 444Video helps organisations upgrade their systems while reducing operational complexity and cost.
The team brings deep knowledge of the UK DTT network, a niche area where expertise is increasingly limited.
Comux selected 444Video for its combination of specialist expertise and practical delivery experience.
Their ability to take ownership of a highly complex project allowed Comux’s leadership team to focus on broader business priorities with confidence.
“Every project is an opportunity to deliver something leaner, more efficient, and easier to manage — not just technically, but operationally as well. We focus on solving the real problem — not just the immediate task. That’s where the biggest gains in efficiency and resilience come from.”
Mark Couto, Technology Lead, 444Video
Client Perspective
“444Video were brilliant—organised, thorough, detailed, and highly communicative.
They allowed us to step back from the project's technical complexity, which was invaluable for a small organisation managing multiple priorities.
I have absolutely no reservations in recommending them to any organisation requiring their technical expertise. Their innovation and problem-solving
capability were exceptional.”
Michael Lever, CEO, Comux UK
Contact Us
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Contact 444Video to explore a smarter, more efficient architecture tailored to your network.