Core Network Platform Migration & Broadband Architecture Design
How a major UK telecom provider modernised its entire core network with negligible downtime.
A story of precision engineering, structured delivery, and future-ready network design.
Client Overview
About the Client
Customer: B2B Communication Provider
Location: United Kingdom
Type: National broadband and network services provider
Objective: Modernise an ageing core routing platform and adopt a scalable broadband architecture without service disruption.
The Challenge
The Hidden Struggle
The provider was operating on a legacy routing platform that had:
growing performance and capacity limitations
increasing software and hardware constraints
operational risks tied to any migration attempt
unresolved interoperability issues from previous tests
They needed modernisation — but without jeopardising live services across the nation.
Why the Customer Chose Plexinor
The Turning Point
The customer selected Plexinor Technologies for our ability to provide:
deep core network engineering expertise
clear and complete HLD/LLD documentation
rigorous PoC and platform validation
a controlled, low-impact migration strategy
parallel broadband architecture evaluation
We were brought in to own everything from initial design to final deployment
Our Engineering Approach
a) Network Assessment & Planning
We conducted a full review of the existing platform, identifying technical gaps and critical dependencies.
b) High-Level & Low-Level Design
Delivered detailed architecture documents covering:
routing and redundancy models
traffic engineering
scalability and performance requirements
operational workflows
c) Proof-of-Concept & Testing
Our team executed a comprehensive PoC, validating:
hardware
software functionality
interoperability
failover scenarios
performance and capacity
All defects were documented, analysed, and resolved.
d) Seamless Migration Delivery
A phased, controlled migration achieved negligible downtime, ensuring uninterrupted nationwide services
e) Broadband Architecture Modernisation
In parallel, Plexinor evaluated next-generation access solutions (including L2TP for PPPoE), delivering:
new architecture design
interoperability validation
scalability testing
migration strategy for future rollout
Transformation: Before & After
Area | Before Plexinor | After Plexinor |
Core Network Platform | Ageing, limited, difficult to scale | Modern, high-performance backbone |
Broadband Architecture | Fragmented, inconsistent | Fully validated next-gen design |
Interoperability | Multiple defects | Verified, corrected, documented |
Migration Risk | High service disruption risk | Negligible downtime |
Future Readiness | Platform constraints | Scalable and ready for new services |
Customer Testimonial
“Plexinor delivered one of the smoothest core migrations we’ve experienced.Their engineering depth and structured approach made a complex transition feel simple.”
What Happened Next?
The customer is now expanding new broadband and core services on a stable, scalable platform.This success has opened the door for upcoming work in automation, monitoring, and next-gen service rollout.
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