🌐 Eltrona (formally Eltrona Interdiffusion SA) is Luxembourg's principal cable television and internet access provider. Founded over 50 years ago and headquartered in Luxembourg City, Eltrona operates an extensive coaxial cable network and is expanding its FTTH (fibre-to-the-home) infrastructure. Eltrona does not offer a Cloud PBX or business telephony product.
Who Is Eltrona?
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.
Note: Mixvoip uses Eltrona's coaxial network as a backup internet path for business continuity. Eltrona infrastructure and Voxbi telephony are designed to work together.
Who Uses Eltrona?
Eltrona's customers are primarily households and small businesses in Luxembourg connected to its cable network. Typical customers include:
- Residential users in areas where the coaxial cable network is available
- Small businesses purchasing bundled internet and TV packages
- Organisations looking for a secondary internet connection for redundancy
- Companies in areas not yet served by fibre from POST or Orange
Eltrona does not target mid-market or enterprise businesses with telephony or unified communications products.
At a Glance: Eltrona vs Voxbi
Eltrona | Voxbi | |
Core service | Cable internet and TV | Cloud PBX telephony |
Cloud PBX | No | Yes |
SIP trunking | No | Yes |
Local Luxembourg presence | Yes | Yes |
ILR regulated (telephony) | No | Yes |
Business phone numbers (LU) | No | Yes |
Compatible together | Yes | Yes |
Detailed Comparison
📶 Internet Connectivity
Eltrona provides cable internet access over its coaxial and fibre network. Connection speeds and availability depend on your address. Business packages are available with static IP options.
Voxbi is a Cloud PBX platform, not an internet provider. Voxbi runs over any internet connection, including Eltrona's. The two services are complementary: Eltrona provides the pipe, Voxbi provides the phone system on top of it.
Choose Eltrona if you need a cable or fibre internet connection in Luxembourg.
Choose Voxbi if you need a business phone system, regardless of who provides your internet.
📞 Telephony and Cloud PBX
Eltrona does not offer a business phone system. There is no PBX, no SIP trunk, no call routing, no IVR, and no softphone application in the Eltrona product range.
Voxbi is a full Cloud PBX platform. It includes all standard telephony features: call routing, IVR menus, call recording, voicemail, mobile softphone, and local Luxembourg numbers.
Choose Voxbi if your business uses Eltrona for internet and needs a business phone system on top of it.
💶 Pricing Model
Eltrona internet packages are priced per connection on a monthly subscription. Business pricing is available on request or via eltrona.lu.
Voxbi is priced per user per month. Full pricing is published at voxbi.com. There is no hardware to purchase and no setup fee for standard deployments.
The two are priced for different services and can coexist on a single budget line each.
🇱🇺 Luxembourg Fit
Both Eltrona and Voxbi are Luxembourg-based organisations. Eltrona is regulated by the ILR for internet services. Voxbi is regulated by the ILR for electronic communications, specifically for telephony.
Using both means your internet and your phone system are managed by Luxembourg providers, both subject to local regulation, and both reachable for local support.
Frequently Asked 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 Voxbi on an Eltrona connection?
Yes. Voxbi runs over any standard internet connection, including Eltrona cable and fibre. Mixvoip already uses Eltrona's coaxial network as a backup internet path, which confirms the two services are compatible.
Should I replace Eltrona to get a Cloud PBX?
No. Eltrona provides internet access; Voxbi provides telephony. They serve different purposes and can run simultaneously. You keep your Eltrona internet connection and add Voxbi 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. Voxbi holds ILR authorisation for telephony services in Luxembourg.
What happens to my phones if I keep Eltrona internet and switch telephony to Voxbi?
Your internet connection continues unchanged. The switch to Voxbi affects your telephony setup only: phone numbers are ported, desk phones or softphones are configured, and call routing is set up. Eltrona's internet service is unaffected.
Compare Other Providers
📮 POST Luxembourg — Luxembourg's national operator. Offers both internet and a business telephony portfolio. Compare POST Luxembourg →
🟠 Orange Luxembourg — Mobile and fixed operator in Luxembourg. Business communications services available. Compare Orange →
📞 Starface — German-made Cloud PBX with self-hosted and cloud options. No Luxembourg presence. Compare Starface →
🔧 Innovaphone — German IP PBX vendor, strong in industrial and engineering environments. Compare Innovaphone →
📅 Ready to explore Cloud PBX for your business?
Start with the provider comparisons or feature guides. If you want expert help, book a short call with a consultant.
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