IP telephony · Centrex (Keyyo) or SIP trunk (3CX)

High-performance telephony, tailored to your practice.

Centrex with Keyyo (Bouygues Telecom Entreprises) for the vast majority of practices, or a 3CX phone system over a SIP trunk for advanced telephony: we recommend the right solution, install it, and manage it for you. Enjoy seamless, secure, uninterrupted communication at controlled costs.

  • Keyyo Centrex · Bouygues Telecom Entreprises
  • 3CX SIP trunk for advanced telephony
  • AI call answering
  • Yealink phones for all our solutions
  • Advanced security and real-time monitoring

Two solutions

Centrex or SIP trunk: the telephony that fits your practice

We assess your needs and recommend the right solution. Either way, elionis equips you with Yealink phones, installs, configures, and monitors your telephony, and remains your single point of contact.

The choice of 90% of our clients

Centrex (Keyyo)

Your phone system is hosted by the carrier Keyyo (Bouygues Telecom Entreprises): nothing to install at your practice, all the features of a professional phone system, and fast setup.

  • Voice greeting, auto attendant, call queues, and transfers included
  • No server at your practice, fast setup
  • Installed, configured, and monitored by elionis
New · advanced telephony

SIP trunk (3CX)

A 3CX IPBX phone system connected to the carrier over a SIP trunk, for practices that want to take call tracking further.

  • Standard 3CX call statistics included
  • After assessing your needs: statistics by day, week, month, quarter, and year, compared with the prior year (N-1), plus custom statuses in a WebApp (3CX API)
  • Optional AI call answering
Discover SIP trunk (3CX)

SIP trunk · 3CX New

SIP trunk (3CX): for advanced telephony

For practices that want advanced telephony, we install the 3CX IPBX phone system, which we know inside out, connected to the carrier over a SIP trunk. Standard 3CX call statistics are included; after assessing your needs, we use the 3CX API to develop a WebApp with statistics by day, week, month, quarter, and year, compared with previous years, along with custom statuses for your practice.

  • A full-featured phone system: voice greeting, call queues, forwarding based on your opening hours, and transfers between practitioners and the front desk.
  • With you everywhere: desk phones, mobile app, and web browser, at one or several sites.
  • Open and scalable: a standard technology that we can connect to your tools through its API.

October 2026 · compared with October 2025

Calls received447+6% vs N-1
Answered95%+3 pts vs N-1
Average wait0:41−9 s vs N-1
Missed calls22−18% vs N-1

Calls received per month

Q11,245+7%
Q21,228+6%
Q31,010+6%
2026 to date3,930+6% vs 2025

Interactive demo, sample data: click a period and hover over the chart.

N-1 comparison

Standard statistics included

With 3CX, you get standard call reports from day one: calls received, missed calls, call durations, and activity for each phone.

Custom statistics and statuses

After assessing your needs, we use the 3CX API to develop a dedicated WebApp: your calls by day, week, month, quarter, and year, compared with the prior year (N-1), plus custom statuses for your phones and front desk.

AI call answering

We connect your phone system to a voice AI, such as Vocca or another technology: it answers calls, including outside opening hours, and takes the load off your front desk.

Our offering

Equipment and carrier, chosen for your practice

Installed equipment

We install Yealink phones, for all our telephony solutions, with large color screens, offering optimal ease of use and HD audio quality for your practice.

Choice of carrier

Since 2008, we have worked with Bouygues Telecom Entreprises, a partner recognized for the stability and reliability of its business network.

What about your Internet connection?

FTTH or FTTO fiber, backed up by a second elionis Fibre line and by 4G: explore our Internet & elionis Fibre offering.

Included with your telephony

Advanced telephony features and maximum security

Our VoIP solutions use the latest technologies to ensure seamless communication and continuous availability of your services. Every installation is managed and monitored by elionis, with automatic backup links for complete reliability.

Included features

  • Pre-answer (welcome message)
  • Speed dialing (internal calls)
  • Hold music
  • IVR auto attendant (multiple options)
  • Incoming and outgoing call log
  • A main reception number
  • Conference calling
  • Call forwarding
  • App on your smartphone

Let's talk about your new project

Contact us or request an audit, and we'll discuss how we can help your business