An on premise or private cloud system is still a VoIP system, providing many of the same features and benefits, like collaboration tools and remote working options.  These deployment models  give you complete control over your systems and data security.

Get more control of your phone system

An on premise or private cloud system is still a VoIP system, providing many of the same features and benefits, like collaboration tools and remote working options.

Where cloud-based VoIP telephony solutions involve little-to-no hardware, an on premise or private cloud system will involve some – whether that’s physical servers or virtual machines. This gives you more control over all aspects of your system, from general configuration, to when and how often it is upgraded.

With this deployment model, you can choose to host the phone system’s hardware yourself or in Blackstar’s data centres. Connect to the PSTN using SIP and a session border controller, which provides low-cost call tariffs and bundles as well as enhanced disaster recovery planning. 


Regardless of where your system is hosted, you’re the boss. With full system administrator access, you can manage all user and call flow configuration—lockdown access to features by user group permissions. Choose when the system is upgraded at a time that won’t impact your business.

Browser-Based GUI

System administration is done via an easy-to-use browser-based GUI. No specialist IT skills or coding knowledge is required. Just point and click to make changes to user and call flow configuration. Use your browser of choice to access the admin portal. Remote access is available via VPN.


Choose whether to have physical hardware or virtual machines. Choose whether to host the system in your existing infrastructure or in our data centres. If you can’t make up your mind, you can choose a hybrid between the two. This kind of flexibility allows you to meet business-as-usual and continuity / disaster recovery requirements.

Private Cloud

A private cloud telephony or UC solution resides on the company’s internal network or in a hosted data centre where your system is protected behind a firewall and running on dedicated infrastructure. 

This can be an excellent option for companies who already have data centres on-site or perhaps have infrastructure as a service off-site because they can use their current infrastructure and connectivity. Private cloud offers an increased level of security and control, and they share very few, if any, resources with other organisations.

In a private cloud environment, you remain in control of maintenance windows, SIP carriers and extended functionality bolt-ons for things like MS Teams integration, PCI compliant call recording and contact centre.  You can choose to retain as much or as little of the management overhead of the solution as you see fit.

When security and control outweigh cost savings, it’s time to think about a private cloud solution. A private cloud solution can leverage virtualisation and converged infrastructure for cloud-like scale and efficiency, but in a private, dedicated system within your own data centre. The protected nature of a private cloud provides an extra layer of security and control to meet industry-specific compliance requirements.

Hybrid Cloud

If you prefer, some elements of your phone system can be virtualised and taken to the cloud, whilst keeping some hardware on-site for various reasons (analogue connectivity, ISDN etc).  

This hybrid model allows for a gradual migration to the cloud and massively improved DR for the system.

If you have a cloud strategy but are not yet ready to completely change phone systems (perhaps you need to sweat the asset) then hybrid cloud may well be the first step on your cloud migration journey.


Handsets remain the audio device of choice for on premise and private cloud solutions. Using a headset provides a comfortable, ergonomic solution for your employees that will work not only with their handset but potentially across other devices too.

Remote working is still an option when choosing either an on premise, private cloud, or hybrid solution. Using a headset when working remotely is a cost-effective way for users to be able to work from anywhere while cutting down on distracting background noise.

Blackstar partners with Poly, Jabra, and EPOS to provide you with the best choice for comfort, features and price when it comes to headsets.

Emily using a Jabra headset


A wide range of handsets is available for Blackstar’s VoIP and Cloud solutions for people who like to pick up and dial a phone. Handsets are delivered to site pre-provisioned. Simply plug them into a working network port, and they’re ready to use.

VoIP handsets adhere to the work from anywhere ethos and are a great addition to a home office. All that’s required to use a handset at home is a network cable to connect to the router and a power adapter.

Blackstar works with Mitel, Poly and Yealink. With a wide variety of models to choose from – including wireless DECT phones – there are plenty of options available to meet your business’s needs.

Our On Premise and Private Cloud Partners

We work with a range of carefully selected partners to provide our clients with choice and a solution that meets their communications needs. 

Our close relationships with industry-leading technology partners provide our clients with solutions that enhance their business.


“Bristol Sport has been able to quickly and seamlessly transition all employees to remote working, due to the scalability and agility of the Mitel technology and Blackstar’s diligence. I can hand on heart say that there has not been one issue – overall, it’s been a huge success."
Mark Kelly
Bristol Sport

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