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

Strengthening PBX security: Passkeys and the Vodia Phone System

Vodia PBX strengthens security with passkeys, giving users and administrators a secure, passwordless login method that eliminates many vulnerabilities tied to traditional credentials. Passkeys use public key cryptography, storing the private key on the user’s device and the public key on the server, making them resistant to phishing and credential theft. By reducing reliance on passwords, Vodia minimizes the attack surface in cloud environments and makes authentication simpler and more secure, while ensuring a smoother, faster login experience for all users.

October 21, 2025

Why Vodia is the Ideal PBX for Microsoft Environments

Many organizations rely on Microsoft as the foundation of their daily operations, but their communication systems often exist in parallel rather than in harmony. Vodia closes that gap by bringing telephony into the same environment where teams already work, turning separate systems into one connected structure. This approach removes friction between platforms, simplifies management, and gives IT teams better control and visibility over daily communication. It also creates a more seamless experience for employees, reduces operational overhead, and builds a stronger, more flexible foundation that supports growth, collaboration, and long-term scalability.

October 17, 2025

Vodia to Attend CVxExpo 2025 in Glendale, Arizona

Vodia will be attending CVxExpo 2025 in Glendale, Arizona, from November 3–5. Sales Engineer Eric Altman will be on site to meet with current and prospective partners, demonstrating how Vodia’s PBX solutions can strengthen technology roadmaps for 2026. This year, Vodia highlights new integrations with ActiveCampaign, Freshdesk, HighLevel, Microsoft 365, Microsoft Presence, monday.com, and Odoo Cloud, along with enhanced call center capabilities such as agent activity dashboards, call recordings, and transcription features. Partners and attendees can schedule meetings with Eric to learn more about scalable, feature-rich, and cost-effective telecommunications solutions built for enterprises and SMBs.

October 14, 2025