📞 Eltrona: Luxembourg's cable network, not a Cloud PBX provider
Eltrona Interdiffusion SA is Luxembourg's main cable television and internet provider. Founded over 50 years ago, it operates an extensive coaxial network and is expanding its fibre footprint. Eltrona does not offer a Cloud PBX, SIP trunks, or business telephony, but its coaxial network plays a notable role in business continuity for Cloud PBX deployments.
⏱ 4 min read · 🇱🇺 Local ISP · 📅 Updated April 2026 · 🔗 eltrona.lu
🏢 Who Eltrona is
Eltrona Interdiffusion SA is a Luxembourg-based telecommunications infrastructure company. Its core business is providing cable television and internet connectivity to residential and business customers across Luxembourg.
Eltrona's network is built on a coaxial cable backbone. The company has been investing in fibre optic extensions to increase capacity and reach. It is one of a small number of fixed-line infrastructure operators in Luxembourg alongside POST Luxembourg and Orange.
Eltrona does not sell phone systems, Cloud PBX licences, or SIP trunking services. Its offering stops at the internet connection layer. That said, Mixvoip uses Eltrona's coaxial network as a backup internet path for business continuity, so Eltrona infrastructure and Cloud PBX services are designed to coexist.
📦 What Eltrona offers
A focused portfolio built around cable and fibre connectivity, plus cable television. No telephony, no Cloud PBX, no SIP trunks.
🌐 Cable internet
Broadband internet delivered over Eltrona's own coaxial network. Business packages available with static IP options.
🧵 Fibre extensions
Ongoing FTTH rollout in selected areas, increasing capacity and reach beyond the cable backbone.
📺 Cable television
Eltrona's original business and still a significant part of its residential and hospitality customer base.
🔁 Coaxial as continuity backup
Although not sold as a standalone product, Eltrona's coaxial network is physically independent from fibre infrastructure. That makes it a useful secondary internet path for businesses running mission-critical services such as Cloud PBX.
Full product details at eltrona.lu.
⚖️ Quick compare with two local rivals
Eltrona is a Luxembourg connectivity provider. This page compares it against two other local operators, so you can see how a connectivity-only provider differs from full-service operators with telephony.
🌐 Eltrona
Local ISP · this page
You are here
ILR-regulated (telephony): ❌ ISP only
Public pricing: ✅ internet plans
ISP independence: N/A (is the ISP)
Greater Region numbers: ❌ not offered
SIP trunks: ❌ not offered
Support languages: 3
📱 Tango
Local operator with telephony
🔗 tango.lu
ILR-regulated (telephony): ✅
Public pricing: ⚠️ starting price only
ISP independence: ❌ Tango internet required
Greater Region numbers: ❌ LU only
SIP trunks: ⚠️ limited
Support languages: 3
Comparison reflects public information. Sources linked from each provider page. Not a ranking.
👥 Typical client profiles
Based on Eltrona's product focus.
🏠 Residential households
The majority of Eltrona's customer base. Cable TV and broadband for homes in areas served by its network.
🏪 Small businesses on cable bundles
Shops, cafes, small offices purchasing bundled internet and TV packages. Eltrona is often the local alternative to POST or Orange.
🔄 Businesses needing a secondary internet path
Organisations using fibre from another provider (POST, Orange, Cegecom) that want a physically independent backup connection for continuity. Eltrona's coaxial network is separate from fibre infrastructure.
🏘️ Customers in cable-served areas
In parts of Luxembourg where cable coverage is strong, Eltrona can be the primary or only local ISP choice.
🎯 Where Eltrona stands apart
Three positioning points relevant for businesses evaluating Eltrona.
🔁 Physically independent coaxial network
Cable infrastructure that does not share the same physical paths as fibre. For Cloud PBX deployments, this makes Eltrona a genuine continuity option even though it does not sell telephony itself.
🕰️ Over 50 years of Luxembourg infrastructure
Long-established as Luxembourg's principal cable operator. The coverage footprint is stable and well-understood in the local market.
⚠️ Not a telephony provider
As with Luxembourg Online, businesses searching for "Eltrona Cloud PBX" or "Eltrona phone system" will not find those products. For voice, pair Eltrona internet with a dedicated Cloud PBX provider.
📚 Terms you can look up
Not sure what something on this page means? The pbx.lu glossary explains each in plain language.
🧩 Decision tree
Two honest recommendations based on business profile.
✅ Choose Eltrona if
- You need cable internet or cable TV in Luxembourg
- You want a physically independent backup internet path beside your primary fibre
- You already have a Cloud PBX and just need the internet underneath
- You are a household or small business in a cable-served area
- You value a long-established local provider
🟡 Look elsewhere if
- You need a Cloud PBX or business phone system (Eltrona does not offer one)
- You need SIP trunks, virtual numbers, or call routing
- You need local numbers in Belgium, Germany, or France
- Your office is in an area not served by Eltrona's cable network
- You want telephony and internet bundled with one telephony-capable supplier
🔎 Other providers worth considering
If Eltrona is not quite the right fit (especially if you actually need a phone system), these are the logical next pages to check.
Same category · other Luxembourg operators
Different category · vendors and platforms
❓ Common questions
Does Eltrona offer a Cloud PBX or business phone system?
No. Eltrona provides internet connectivity and cable television. It does not sell phone systems, Cloud PBX licences, or SIP trunking. If you use Eltrona for internet, you need a separate telephony provider for your business phones.
Can I use a Cloud PBX on an Eltrona connection?
Yes. A Cloud PBX runs over any standard broadband connection, including Eltrona cable and fibre. Mixvoip already uses Eltrona's coaxial network as a backup internet path for business continuity, which confirms the two services work well together.
Should I replace Eltrona to get a Cloud PBX?
No. Eltrona provides internet access; a Cloud PBX provides telephony. They serve different purposes and can run simultaneously. You keep your Eltrona internet connection and add a Cloud PBX on top for your phone system.
Is Eltrona regulated for telephony in Luxembourg?
Eltrona is regulated by the ILR for internet and cable television services. It is not listed as an authorised electronic communications provider for telephony.
Why is Eltrona's coaxial network useful for business continuity?
Eltrona's coaxial cable network follows different physical paths from fibre infrastructure. If a fibre cut affects your primary internet, a coaxial backup over Eltrona can keep services running. This is especially relevant for businesses where Cloud PBX uptime matters. Mixvoip offers this backup path directly through its own bundled offer.
What happens to my phones if I keep Eltrona internet and add a Cloud PBX later?
Your internet connection continues unchanged. Adding a Cloud PBX affects your telephony setup only: phone numbers are ported from your current provider, desk phones or softphones are configured, and call routing is set up. Eltrona's internet service is unaffected.
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📅 Ready to explore Cloud PBX for your business?
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