Tech

Hosted PBX and Virtualization

Published on:

January 4, 2014

In 2014, the hosted PBX industry gained more clarity on key technologies, with virtualization becoming crucial. Virtualization allows several servers to run on the same hardware, making the process faster and more efficient and offering robust failover mechanisms to maintain service, even during hardware failures. Unlike traditional services, PBX systems require real-time response times measured in milliseconds, which means virtual machines must have exclusive CPU control. Vodia’s multi-tenant solution enables the efficient use of resources, offering a scalable hosted PBX service with minimal disruption while keeping deployment costs low and allowing rapid expansion.

It is 2014 and we have a clearer picture of what's important in the hosted PBX business.

Virtualization is one of the key technologies in the server world, which is also sometimes referred to as the “cloud”. It makes it possible to run several servers on the same physical hardware. This makes it possible not only to run servers more efficiently, but to also automatically set up those servers in a matter of seconds without human interaction.

When it comes to the PBX and virtualization there are a few things to consider. In contrast to HTTP and other services, the hosted PBX demands real-time reaction times in the area of milliseconds. This has several important implications that make the difference between mediocre and excellent service.

Virtualization makes it possible to implement an extremely robust failover mechanism that continues service on the same IP addresses even if the hardware crashes. This not only makes it possible to have “eternal” services, it also makes it possible to upgrade the underlying hardware while the service is active. With this technology, calls may stay up - even if they are, for example, in an ACD with minimal service disruption.

Because of the real-time requirements, the hosted PBX virtual machine needs to have exclusive control over the CPU running the virtual host. This means that practically one CPU core can run one virtual machine, something we already saw in 2005 when the pbxnsip project was initiated. It makes it possible to have hundreds of customers running on the same CPU core in a virtual environment. Other PBX solutions designed as single domain solutions need one virtual machine for each customer, even if there are only two extensions on it. This causes a lot higher resource usage, thus higher costs. Additionally, while we are still using IPv4, it also needs a lot more valuable IPv4 addresses than the multi-tenant solution.

The other implication of the real-time nature of the hosted PBX is vicinity. It isn't possible to serve large areas with one big data center. Instead, the virtual machines need to be located close to the customers, with “close” being defined by the ping times. Here the cost of deploying a hosted PBX is a key issue. With the simple architecture of the Vodia PBX, we are in a good position to serve customers all over the world. A new PBX can be deployed in a matter of minutes and even automatically, just like a new virtual machine can be deployed today.

Latest Articles

View All

Vodia and Microsoft Teams: A Robust Integration for Business

The integration between Vodia PBX and Microsoft Teams gives businesses a seamless way to combine powerful SIP-based telephony with modern collaboration tools. With advanced call control, a built-in Session Border Controller (SBC), and extensive customization options, the Vodia PBX enables organizations to manage both Teams and SIP users within a single, secure, and flexible system. This hybrid architecture allows companies to tailor their communications infrastructure to match their specific operational needs - whether across departments, locations, or user roles.

June 17, 2025

Flowroute SMS and MMS With Vodia PBX | Video Tutorial

Vodia PBX integrates seamlessly with Flowroute to enable SMS and MMS messaging within your VoIP system. This video tutorial guides you through the entire process - from setting up your Flowroute account and configuring SMS and MMS in the Flowroute portal to webhook setup for message delivery and thorough testing to ensure everything runs smoothly. Designed for businesses and service providers alike, this comprehensive guide helps you quickly and efficiently add reliable, scalable text messaging features to your communication infrastructure, enhancing your overall VoIP experience.

June 16, 2025

Five-Star Hospitality Communications: Fanvil IP Hotel Devices and the Vodia Phone System - Join Our Upcoming Webinar

Fanvil and Vodia are teaming up for a webinar on June 25, 2025, to demonstrate how their combined technologies create a modern communication system tailored for the hospitality industry. By integrating Fanvil’s specialized IP Hotel Devices with the Vodia Phone System, hotels can deliver seamless, efficient interactions between guests and staff, using both simple button presses and voice commands. The webinar will cover practical deployment strategies, real-world applications, and the ways this integration enhances guest experience, streamlines operations, and reduces costs.

June 11, 2025