Mobility

Fixed Mobile Convergence (FMC)

One number across mobile and desk phone, carried over the mobile network for rock-solid quality. Available in Belgium and Luxembourg through our partner Mixvoip.

Fixed Mobile Convergence bridges your company's fixed phone system and your employees' mobile phones at the network level. Instead of relying on a data connection or an app, calls are routed through Mixvoip's mobile network, which means your business number stays live and stable even in areas with poor data coverage. Every call, inbound and outbound, passes through Voxbi, so features like time-based routing, voicemail, call forwarding, and call records work exactly as they do on a desk phone.

This is a co-promoted offering available in Belgium and Luxembourg through Voxbi's telco partner Mixvoip, which supplies the FMC SIM card and manages the underlying mobile network connection. Setup requires a dedicated Mixvoip SIM card; it is not self-serve software you configure alone.

When you'd use fixed mobile convergence

  • A sales team whose members are often out of the office but must still show the company number and have their calls logged centrally.

  • A company in a regulated sector (such as financial services) that needs all outbound calls recorded in one place regardless of whether they were made from a desk or a mobile phone.

  • An organisation that wants employees to enjoy a genuine right to disconnect: because the FMC number cannot be called directly, the Voxbi PBX controls all routing, so a user who is set to "Away" in the system will not receive calls on their mobile.

How FMC works in Voxbi

  1. Order the FMC SIM card from Mixvoip

    Mixvoip provides a dedicated SIM card built for FMC. This SIM links the employee's mobile device to the Voxbi PBX at the network level rather than over the internet.

  2. Register the FMC number as a twinning entry in Cockpit

    In the Voxbi Cockpit, open the user's Call Preferences, go to the Twinnings section, and enter the FMC number with "VoIP and GSM fallback" as the dial strategy (voice over IP, with mobile-network fallback).

  3. The integration is active

    Incoming business calls ring the mobile via the FMC connection. Outbound calls placed from the device are routed through Voxbi and display the employee's business number.

  4. Optionally use dual-SIM devices

    Employees can keep a personal SIM for private calls and data, and use the FMC SIM exclusively for business calls, giving a clean separation between the two.

Frequently asked questions

Where is FMC available?

FMC is currently available in Belgium and Luxembourg through Voxbi's partner Mixvoip, which operates the mobile network and provides the required SIM card. Speak to Mixvoip to check coverage and get a quote.

How is FMC different from mobile twinning?

Mobile twinning makes your desk extension and a mobile number ring at the same time using any mobile number you already own; calls travel over the internet or your existing carrier. FMC uses a dedicated Mixvoip SIM card and routes calls through the mobile network directly, so it does not depend on data quality and works with all phone brands without an app.

Do employees need to install anything?

No. Because FMC works at the SIM and network level, it functions on any phone brand or operating system with no app required. The Voxbi app can still be used alongside FMC for softphone calls when a data connection is available.

Is FMC compliant with call-recording regulations?

Yes. Because all calls pass through the Voxbi PBX, call detail records for both fixed and mobile calls appear in one place. Because all fixed and mobile calls pass through the Voxbi PBX, FMC helps support call-recording obligations such as those under MiFID II. Confirm the specifics with Mixvoip for your sector.

See Voxbi in your business.

Talk to us or to a certified Voxbi partner.