---
title: Brownfield edge data centres for incumbent operators
description: Turn urban switching centres into revenue generating infrastructure
image: https://entegro.com/hubfs/WP_Brownfield-Edge.webp
---

[Skip to main content](https://entegro.com/insights/brownfield-edge-data-centres-for-incumbent-operators#main)

[![Entegro](https://entegro.com/hs-fs/hubfs/raw_assets/public/stoicaXentegro/images/entegro-logo.png?width=59&height=64&name=entegro-logo.png)](https://entegro.com)

- [Telecoms](https://entegro.com/telecoms)
- [Energy & Power](https://entegro.com/energy-and-power)
- [Case Studies](https://entegro.com/projects)
- About ![](https://entegro.com/hubfs/raw_assets/public/stoicaXentegro/images/nav-chevron.svg)
  
    - [About Entegro](https://entegro.com/about-entegro)
    - [People and culture](https://entegro.com/people-and-culture)
    - [Careers](https://careers.entegro.ie/)
- [Insights](https://entegro.com/insights)
- [Get in touch](https://entegro.com/contact-us)

[Get in touch](https://entegro.com/contact-us)

Network

# Brownfield edge data centres for incumbent operators

Turn urban switching centres into revenue generating infrastructure

---

**Entegro** • October 14, 2026 • **7 min read**

![Brownfield edge data centres for incumbent operators](https://entegro.com/hubfs/WP_Brownfield-Edge.webp)

Incumbent operators already own some of the assets an edge data centre needs most: urban locations, established fibre routes and substantial power connections. As copper, PSTN and legacy transmission equipment leave those buildings, a new commercial opportunity opens up.

Larger switching centres can become productive infrastructure for the next generation of digital services. Consolidating the live network releases space. Modernising power and cooling makes it usable. Modular fit-out creates capacity that operators can lease, expand and monetise.

This paper outlines how Entegro can bring its extensive experience across the network lifecycle to this exciting opportunity for value creation in incumbent telcos.

### Make network retirement the start of a new business case

The opportunity combines lower legacy operating costs with recurring income from colocation, connectivity and infrastructure services. The focus is on urban centres close to enterprise customers and network demand, where existing infrastructure gives conversion a strong starting position.

For operators reviewing their property portfolios, the decision should begin before the last rack is removed. Retaining the right building and connection preserves options that may be costly to recreate. A phased edge development puts those assets to work while allowing the operator to choose its level of investment and operating involvement. We bring the engineering detail needed to make that decision with confidence.

### Entegro brings the capabilities together

We understand the network that must keep working while the building changes around it. Our consolidation experience with Tier 1 operators in the United States and Ireland, combined with Entegro Energy and Kyntus operations resources, allows us to turn legacy retirement into new revenue streams.

We help operators assess the opportunity, groom and migrate live traffic, release space, modernise power, integrate modular data centre environments and support ongoing operations. One coordinated lifecycle, built around the realities of a working telecoms estate.

## A smaller network creates a larger opportunity

PSTN retirement, fibre rollout and packet transport are removing layers of equipment from the exchange. Copper access can occupy large distribution frames and cable entries, fed by dozens of high-count pressurised cables. Fibre changes that physical equation.

### Concentrate subscriber access

With passive optical network (PON) split ratios of 1:32 or 1:64, 6,400 subscribers can share 200 or 100 feeder fibres respectively. Smaller cables and compact optical equipment sharply reduce the infrastructure needed to serve those customers.

![Connection paths required to serve 6,400 customers by fibre vs copper](https://entegro.com/hs-fs/hubfs/undefined.png?width=1670&height=574&name=undefined.png)

Figure 1 Connection paths required to serve 6,400 customers by fibre vs copper

### Consolidate switching and transmission

IP voice concentrates call control into a small number of resilient core locations. Modern IP and wavelength-division multiplexing (xWDM) platforms deliver far more capacity per rack than legacy circuit switches and time-division multiplexing (TDM) equipment. Grooming traffic onto fewer systems releases racks, cabling and electrical load.

The prize is usable space, not simply empty cabinets and lower energy bills. We map live services and dependencies, migrate or cease circuits, then de-power and recover redundant equipment. Leased lines, interconnects, alarms and specialist services are dealt with explicitly. Actual space released depends on the retained network, splitter locations and resilience requirements.

This requires more than a removal schedule. A single surviving circuit can keep an entire platform powered; shared supplies and cable routes can tie apparently redundant equipment to essential services. Our legacy-network knowledge helps expose those constraints early, so the consolidation plan releases complete areas and measurable load. Each migration advances the future layout as well as the retirement programme, reducing the risk of repeated moves and avoidable rework.

### Build around the assets already in place

Urban switching centres combine location, connectivity and power infrastructure that a new development must secure from scratch. Entegro turns that starting advantage into a practical conversion plan, with the live network protected throughout.

## Put urban infrastructure back to work

Edge facilities bring compute and storage closer to customers. Local AI inference, video analytics, content caching and enterprise platforms benefit from shorter network paths, reduced backhaul traffic and local data handling. A distant 1 GW hyperscale campus provides scale; urban edge capacity serves workloads whose response times and operating requirements depend on proximity. In conjunction with physical assets in central urban areas, routing and platform design is also key to deliver that benefit.

Operators are already recognising the benefits of this approach. Telefónica converted former copper exchanges into edge facilities and completed 17 Spanish edge nodes by June 2026. UltraEdge’s SFR infrastructure transaction was valued at €764 million in 2024; its subsequent site revitalisation programme commits €400 million through 2028.

The strongest prospects sit close to enterprise clusters, transport hubs and regional service providers. Existing fibre routes can support cross-connects and cloud access, while secure, segregated space gives tenants an alternative to running their own facilities. We focus the engineering assessment on that customer proposition: usable capacity, access, resilience and expansion potential. The result is a facility designed around what tenants need to buy.

### Turn released power capacity into productive infrastructure

Network consolidation frees electrical capacity as well as floor space. Where the existing grid capacity is retained, lower legacy demand creates headroom for a new use. Leaving that headroom idle leaves part of the site’s infrastructure investment underused. A phased edge facility can put it to work serving customers and generating recurring revenue.

Since in many markets grid capacity is constrained, an established grid connection is a strategic asset. Smaller edge projects still need sufficient local capacity; a modest requirement does not remove that dependency. Reusing an existing connection can reduce reliance on securing a new supply or reinforcement, giving suitable urban exchanges a valuable starting advantage. Assess this opportunity before surrendering connection capacity or disposing of the site. The capacity available to an edge facility must allow for the retained network, cooling, electrical losses and resilience.

Entegro Energy turns that starting advantage into a delivery plan. Our Nahanagan and ACEL capabilities bring high- and medium-voltage engineering, electrical infrastructure and energy storage. We verify the capacity that can be reused, design upgrades to ageing rectifiers, UPS systems and distribution, and phase the new load around live services. The objective is productive use of the connection already in place, matched to tenant demand and a viable operating model.

## Deliver the conversion while the network stays live

Our work for major operators gives us practical knowledge of central offices, colocation environments and legacy technologies. We understand how to groom, divert and cease traffic, and how to sequence works around the services that remain. That is the critical additional discipline a live exchange demands beyond construction expertise.

### Analyse and plan

We reconcile site surveys with inventory and service records, map dependencies and quantify releasable space and power. We develop the retained-network layout and conversion scope together, giving operators a costed basis for selecting the strongest urban sites.

### Migrate and retire

We concentrate traffic onto surviving systems, divert or migrate services and agree cessations with their owners. Controlled change windows, rollback plans and service checks govern the release of equipment. Recovery follows verified isolation.

### Modernise and install

Entegro Energy connects legacy load removal with electrical modernisation. Working with specialist delivery partners, we integrate modular rooms, containment and power or cooling assemblies into cleared space. Off-site fabrication and testing can accelerate delivery and reduce disruption inside the live building. Site-specific fire, structural, cooling and resilience requirements remain integral to the design and commissioning.

### Monitor and operate

Leveraging Kyntus resources, we can provide infrastructure monitoring, alarm triage, escalation, maintenance coordination and service reporting. Building and electrical monitoring connect to local engineering response, with coverage and responsibilities agreed for each facility. This carries the conversion through into day-to-day operations.

### Match the commercial model to the asset

Converting selected urban switching centres creates an opportunity for recurring revenue through shell leasing, serviced colocation or an infrastructure partnership. The value depends on local demand, achievable rental rates, occupancy and take-up, conversion and lifecycle costs, usable power and cooling capacity, energy recovery terms and the allocation of operating responsibilities, assessed against the alternative of disposal or continued retention.

### Identify the next use for your urban estate

Entegro brings network migration, power engineering and operational support into one coordinated programme. Start with a portfolio assessment to identify which urban switching centres can support a viable edge business and the steps needed to get them there.

[Talk to Entegro](https://entegro.com/contact-us) about converting your urban switching centres.

## About Entegro

Entegro is an infrastructure engineering group headquartered in Kilkenny, with operations in Ireland, the UK and the US. Founded in 2018, it designs, builds and operates telecoms and energy infrastructure, and is a delivery partner in the National Broadband Ireland programme. Entegro has been part of Kyntus Group since 2024.

## Related insights

![Why good fibre network design determines the cost, speed and lifespan of a rollout](https://entegro.com/hs-fs/hubfs/WP_Fibre-Network-Design%20(1).webp?width=400&height=300&name=WP_Fibre-Network-Design%20(1).webp)

Whitepapers

### Design once, build once

Every fibre network is built twice: once in the design and once in the ground. When the design is right, the build runs to plan. When it is ...

[View all insights](https://entegro.com/insights/design-once-build-once)

![Colleague pointing at a network route map on a computer screen](https://entegro.com/hs-fs/hubfs/supplied%20wind%20imagery%20(4).webp?width=1392&height=520&name=supplied%20wind%20imagery%20(4).webp)

Start a conversation

## Explore more from Entegro

Talk to Entegro about how we can help improve, modernise or transform your infrastructure.

Talk to Entegro View case studies

[![Entegro, a Kyntus Group company](https://entegro.com/hs-fs/hubfs/raw_assets/public/stoicaXentegro/images/entegro-logo-reversed.png?width=82&height=88&name=entegro-logo-reversed.png)](https://entegro.com/)

Engineering the infrastructure that connects and powers modern life.

Markets

- [Telecoms & Networks](https://entegro.com/telecoms)
- [Energy & Power](https://entegro.com/energy-and-power)

Explore

- [Case Studies](https://entegro.com/projects)
- [About Entegro](https://entegro.com/about-entegro)
- [People & Culture](https://entegro.com/people-and-culture)
- [Careers](https://careers.entegro.ie/)
- [Insights](https://entegro.com/insights)

Contact

- [Get in touch](https://entegro.com/contact-us)
- [Our locations](https://entegro.com/contact-us#hs_cos_wrapper_main_content-module-6)

© 2026 Entegro. All rights reserved.

- Privacy
- Cookies

[![](https://entegro.com/hubfs/raw_assets/public/stoicaXentegro/images/footer-linkedin.svg)](https://www.linkedin.com/company/ipone-ltd/)

```json
{
  "@context" : "https://schema.org",
  "@type" : "BlogPosting",
  "author" : {
    "@type" : "Person",
    "name" : "Entegro",
    "url" : "https://entegro.com/insights/author/entegro"
  },
  "dateModified" : "2026-11-10T12:56:19.387Z",
  "datePublished" : "2026-10-14T04:30:00.000Z",
  "headline" : "Brownfield edge data centres for incumbent operators",
  "image" : [ "https://entegro.com/hubfs/WP_Brownfield-Edge.webp" ],
  "mainEntityOfPage" : {
    "@id" : "https://entegro.com/insights/brownfield-edge-data-centres-for-incumbent-operators",
    "@type" : "WebPage"
  },
  "publisher" : {
    "@type" : "Organization",
    "logo" : {
      "@type" : "ImageObject",
      "url" : "https://entegro.com/hubfs/Entegro%20logo.png"
    }
  }
}
```