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

Transforming Maritime Connectivity with MS Teams: A Communication Solution for Cruise Ships

Reliable communication is essential for cruise ship safety, operational efficiency, and an exceptional guest experience, yet it faces unique challenges including remote connectivity, signal interference from metal structures, and stringent network security requirements. The Vodia PBX, now certified for MS Teams, offers seamless satellite integration, emergency calling, and direct communication between crew and passengers. This combination ensures continuous 24/7 connectivity, supports emergency protocols, and enhances onboard collaboration.

June 5, 2025

Embrace Unparalleled Digital Diversity and Secure Data Ownership with the Vodia PBX

Vodia gives you full control over your communications with operating system independence, multi-cloud VoIP capability, and complete data ownership. Whether you deploy on-premise, in your own data center, or across major cloud platforms like AWS or Azure, Vodia’s flexibility ensures resilience, scalability, and freedom from vendor lock-in. With support for multiple OS environments and features like zero-touch provisioning and redundant SIP trunks, it’s a future-proof solution built for secure, adaptable business communications.

June 3, 2025

The Vodia PBX Now Integrates with ActiveCampaign

Vodia’s latest integration with ActiveCampaign brings together a powerful cloud PBX system and a leading customer experience automation platform. This integration enables businesses to automatically track and manage customer interactions by creating and updating contacts based on call activity, recording detailed call information, and linking calls to the appropriate users within ActiveCampaign. By combining Vodia’s advanced telephony features with ActiveCampaign’s AI-driven marketing and sales automation tools, companies can deliver more personalized experiences, improve team productivity, and drive growth through smarter, data-backed communication.

May 29, 2025