Phone system software that runs where you do.
IBeX4 is communications platform software from Finite Technologies (FTI). It installs anywhere Debian 13 runs, as a virtual machine, an LXC container or on a dedicated server, and works with any IP phone that supports the SIP standard. For large organizations and for service providers who run their own services on it.
Who IBeX4 is for
For enterprise
Universities, government, healthcare and multi-site organizations running their own phone system at scale.
IBeX4 for enterprise →For service providers
Providers who license IBeX4 to run their own hosted phone services, with a custom installation built around their network.
IBeX4 for service providers →For government
US agencies and public institutions that need a phone system developed in the USA and run on their own infrastructure.
IBeX4 for government →One platform, three ways to run it
On your hypervisor or cloud, on a system we design for you, or hosted by us.
Deployment options →Use the phones you choose
Any SIP phone or app
Works with any IP phone that supports the SIP standard: desk phones, cordless and conference phones from any manufacturer, plus softphones and mobile apps. No proprietary handsets.
Built on Asterisk 22
Fully compatible with Asterisk 22, so standard dial plans, tools and integrations carry over. See every feature.
IBeX4 in four answers
What is IBeX4?
IBeX4 is the fourth generation of IBeX, FTI’s phone system software. It handles calling, voicemail, call queues, auto attendants, conferencing and call recording for thousands of extensions, and it installs anywhere Debian 13 runs.
Where does it run?
Almost any virtual environment: if it runs Debian 13, it runs IBeX4. Most customers use a virtual machine or LXC container, because a hypervisor lets you refresh servers, add capacity, take snapshots and fail over without changing the phone system.
How proven is it?
IBeX has been in production since 2003. IBeX4 is the fourth generation, and service providers around the world run their own services on IBeX.
Who supports it?
FTI, the developer. Standard support (8×5, Alaska time) is included, and 7×24 support is available for round-the-clock coverage. Call +1 907-257-2600 or email [email protected].
Standard or custom, we install it
Standard installation
IBeX4 on your own hypervisor or Debian 13 servers. Install it yourself, or have FTI carry out the full implementation.
Custom installation
A design built around your network, scale and integrations, optionally on hardware we supply with IBeX4 preinstalled, backed by training and implementation support.
SIP Trunking
Connect IBeX4 to the phone network, including the US from anywhere in the world, with SIP Trunking & IP Interconnection from IBeXc.
IBeX4 questions
Is IBeX4 a hosted phone service or software?
Software. IBeX4 is phone system software you run on your own hypervisor or cloud, on a system FTI designs for you, or hosted by FTI. If you want a ready-made hosted phone service for a smaller office, see IBeXc.
Which hypervisors and clouds does IBeX4 run on?
Almost any. IBeX4 deploys in virtually any environment that runs Debian 13. It is built on Proxmox VE, where it runs as a virtual machine or an LXC container, and runs in Debian 13 virtual machines on VMware, Microsoft Hyper-V, KVM and public clouds such as Microsoft Azure, Google Cloud and AWS.
How is IBeX4 licensed?
With a one-time onboarding fee and a subscription per configured device (SIP or IAX2 peer): from $3.00 per device per month with standard support, with a lower rate for larger systems, or $1.20 more with 7×24 support (billed monthly on peak configured devices, minimum 150 devices). The same licence applies to every organization and service provider. Updates and standard support are included. See licensing and pricing.
Do you sell outside the United States?
Yes. FTI sells IBeX4 wherever US export regulations allow. IBeX4 runs in any data center or cloud region, and FTI supports customers worldwide.
Who makes IBeX4?
Finite Technologies Incorporated (FTI), a software and services company founded in 1990. IBeX has been in production since 2003.
Planning a phone system for a large organization or a service?
Tell us what you run today and where you want to be. We’ll recommend a standard or custom installation.