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Business telephone solutions - on-premise

On-premise VoIP telephone solutions

Our flexible and scalable on-premise VoIP telephone solutions are suitable for companies of any size from small to medium businesses through to multi-site large enterprises. We supply on-premise solutions from top VoIP phone systems’ manufacturers to give us a wide enough choice to meet your needs.

What is an on-premise VoIP phone system?

A phone system, also known as a PBX, with hardware hosted on site in your office, factory, school, etc., is described as ‘on-premise’. The server is housed in a rack in a comms cupboard or room and your handsets connect to it via your local area network, using traditional or CAT5 cabling.

For some businesses, the traditional VoIP phone system is more suited to their needs as they require complete control over their hardware and want to enjoy the functionality and reliability that on premise PBX systems offer, such as call routing, recording and queuing, on-hold messages and music, voicemail, and access to a company directory of extensions accessed via feature-rich handsets.

Benefits of an on-premise VoIP PBX

You are in control

With an on-premise VoIP phone system, you are in control of your PBX and you can customise your solution to suit your business or organisational needs. While VoIP solutions for small business are appropriate in many cases, larger enterprises will benefit the most from a premise-based phone system.

Capital payment

You can pay for a premise-based phone system with a one-off capital payment or spread the cost over a short term to avoid paying on an ongoing subscription per user per month basis. This is particularly pertinent if you want to make the most of your purchase and depreciate it over seven to 10 years to lower your total cost of ownership.

Contact centre-ready

On-premise telephony solutions are the ideal choice for large enterprises that use contact centres. We can integrate your CRM with your contact centre software to effectively manage your outgoing and incoming calls so you can improve your customer service and prospecting conversations to help increase the efficiency of your call handling staff.

Best on-premise VoIP phone system for your business 

Alcatel-Lucent Enterprise

Alcatel-Lucent Enterprise is a leading provider of enterprise communications, networking and cloud solutions for business of all sizes. We have been an Alcatel-Lucent partner for more than 30 years, designing, deploying and supporting their on-premise phone systems and unified communications solutions, including the OXO Connect, OXE Connect and the Rainbow app.


Mitel offers business communications solutions that make interactions simple using VoIP telephone systems, unified communications, real-time collaboration tools and integrated contact centres. Mitel’s innovative solutions help customers keep up with leading technology trends, like bring-your-own-device (BYOD), cloud-enablement and multi-channel communication.

Frequently asked questions

1. What’s the difference between an on-premise and a cloud-hosted phone system?

The main difference between an on-premise phone system and cloud-hosted cloud phone system is the ownership of the phone system and software itself. An on-premise PBX is all yours! A cloud-hosted PBX is owned and managed by the cloud provider, is managed at cloud level and your business connects to it via the internet.  

2. Any disadvantages of an on-premise phone system?

Disaster recovery is not built in as standard, although we can offer you a secondary backup option. You will also need to upgrade your PBX every few years with latest manufacturer software releases, as they become available, to provide you with updated security and features.

3. Can you use an on-premise phone system without ISDN lines?

Yes! Modern versions of the on-premise PBX are compatible with internet-based SIP channels, which are the replacement for the copper ISDN and PSTN lines that are being withdrawn by Openreach. Older versions will need to be replaced though as they are not compatible with SIP and will lack modern-day functionality.

4. Can remote workers use an on-premise phone system?

Unified communications apps on mobiles and desktops have been developed to link to on-premise telephone solutions so remote working or mobile staff members can still be part of the same system for effective incoming and outgoing call transfers, voicemail and access to company directories, and they can do this from any location, on any device at any time.

Useful Resources

>Dispelling the myth of the premature death of the business phone system

>Questions to ask when considering a new phone system

>Three events collide to trigger phone system upgrades

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