Your own phone system, on your own infrastructure.
IBeX4 gives large organizations a full-featured phone system that runs on the infrastructure they already manage, without per-feature add-ons and with support direct from the developer.
Built for organizations with hundreds to thousands of extensions
Universities and campuses
Thousands of extensions across buildings, departments and remote sites, managed by your own IT team.
Government and public sector
Keep your phone system in your own data center or chosen cloud region, under your own control. IBeX4 is developed in the USA.
IBeX4 for government →Multi-site organizations
Connect offices, clinics or branches into one system with one dial plan, across cities or countries.
What enterprises get
All features included
Call queues, auto attendants, IVR, voicemail to email, conferencing, call recording, call parking, paging and more. There are no optional feature packs.
Runs on what you have
Anywhere Debian 13 runs: VMware, Proxmox VE (VM or LXC), Microsoft Hyper-V, a public cloud or your own servers. Use your existing backups, monitoring and high availability.
Standard or custom, your choice
Organizations with a virtualization team often run a standard installation, installed by their own team or fully implemented by FTI. Custom designs, including preinstalled hardware with training, are available for complex or multi-site systems.
One company for everything
Software, installation, support and, if you want it, SIP Trunking & IP Interconnection through IBeXc.
Enterprise questions
How many calls can IBeX4 handle?
IBeX4 has been tested to 8,500 simultaneous calls on FTI’s virtual machine systems. It can go higher: our test systems couldn’t generate any more calls. Several systems can also be linked for very large organizations.
How is IBeX4 priced for organizations?
As a monthly subscription based on your peak number of configured devices (SIP and IAX2 peers: phones, softphones, devices and trunks), including updates and standard support, with 7×24 support available. Standby and test instances are included. See licensing.
Does IBeX4 work with our existing desk phones?
IBeX4 works with standards-based SIP desk phones, softphones and devices.
Can we keep the phone system in our own data center?
Yes. That is the most common way organizations run IBeX4.
What if we are a smaller office?
For smaller offices, IBeXc runs IBeX for you as a hosted business phone system, so you don’t need your own platform.
Replacing an aging phone system?
Tell us what you run today. We’ll map the move to IBeX4 on your infrastructure.