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Cut costs and improve your service with a powerful on-premises phone system

Is your phone system holding you back? Our powerful on-premises systems can transform your business, while keeping costs low.

Every person in your firm can have their own direct dial number and voicemail inbox. And as your business grows, you can add handsets when new people join.

Our systems can be linked to your database so your customers’ names pop up when they call. And for better communications you can add instant messaging and conferencing.

Compare on-premises phone systems
Price range
Number of users
Ideal for
Compatible with SIP
Proactive remote monitoring
Cost - payment options

Avaya IP Office

Entry-level to mid-range system for up to 2,000 users

From £1,400 (ex VAT)

5 - 2,000

Feature-rich system designed to grow with a customer


Engineer install


3 care options available

Option to upgrade
Install new extensions

Fault reporting 24/7

Purchase or lease

MiVoice Business

A high-end system for up to 20,000 users

From £3,150 (ex VAT)

16 - 20,000

Designed to help maximise customer contact opportunities


Engineer install


3 care options available

Option to upgrade
Install new extensions

Fault reporting 24/7

Purchase or lease

Optional extras

On-hold music and messaging

We have a range of on-hold and messaging services, including:

  • Professional greeting messaging
  • Digital memory playback devices so you can produce customised on-hold marketing messages and rapidly change your copyright-free music
  • Fully-managed suite of messaging services: regular update of on-hold music plus scheduled marketing messages


Voice recording

Call recording services on analogue, ISDN2, ISDN 30, and SIP lines for all types of business: single user, SME, and corporate.  

  • Call recording options including on-demand, all-calls, selected-extensions, and mobiles
  • Help with PCI compliance
  • Training and evaluating staff
  • Speech analytics
  • Workforce optimisation recording


Unified Communicator

Get a screen-pop showing all your caller’s details before you answer a call. The BT Unified Communicator software connects your agents’ PC desktops to the phone system and your database (or Outlook).

  • Dial from an address book, Outlook, or CRM contact page
  • Send and receive internal messages
  • Each user has a companywide view of the status of their colleagues (so they know whether to call, transfer or send messages to them)
  • Windows and MAC desktop clients
  • Attendant console for complete companywide visibility and control



Secure Access Control

Access control options from a simple, single button intercom-based solution to complete access control systems.

  • Access control systems connected to analogue or SIP extensions
  • Link to BT-installed lock mechanisms that allow people to control the lock from their BT phone handset
  • Options for internal cameras that display images of visitors on your PC screen


Audio Visual ringing options

Loud rings and flashing lights for noisy areas where people can’t normally hear the phone ring.

  • Analogue and SIP loud ringing devices
  • LED strobe units that flash simultaneously with the handset ring in noisy areas
  • Paging units so you can make announcements directly from your phone handset (for use in production areas and waiting rooms).
  • Range of IP paging systems
  • Interface to connect existing PA systems to your new BT IP phone system, if needed



Choose from a wide range of corded and wireless headsets from well-known brands such as Jabra and Plantronics, including mono, duo, and premium options. 

DECT handsets

DECT handsets are high-quality cordless phones that use Digital Enhanced Cordless Telecommunications technology, which is compatible with all of our phone systems including the MiVoice Business, and Avaya IP Office.

Structured cabling

With structured cabling there is no need for independent voice and data wiring; structured cabling accommodates both. And it allows you to carry out your own moves and changes.

Consider structured cabling if you’re -

  • Changing to an IP phone system (including BT Cloud Voice)
  • Moving premises
  • Kitting out a new building or greenfield site (we’ll give you a quote based on plans and drawings)
  • Planning an office refurbishment or reorganisation
  • Struggling with bandwidth-hungry applications like video conferencing or data streaming and you need faster servers and PCs

Why BT for structured cabling?

  • Our pricing includes all of the cabling components you’ll need to support the new phone system/LAN/cloud solution
  • We have specialist structured cabling engineers
  • Our cabling and associated products come with a 25-year warranty
  • We co-ordinate the installation with your other BT products



Our Customer Training Portal is the perfect place for you to learn how to fine-tune your system as your business changes and grows.

  • 24/7 access to a suite of training courses and video content
  • Use our training portal to view and book upcoming live webcast courses
  • Train from anywhere – great for remote workers and businesses with multiple sites
  • Learn how to change or implement features, as and when you need them
  • On-site courses available if you prefer face-to-face training
Call Accountant

Stay on top of every call and control your costs.

Get the big picture on all the calls coming in and going out of your business. Find out your busiest times of the day, discover the cost of outgoing calls split by department, and everything in between.

Why BT Business?

Local expertise

Get the right solution for your business from BT Local Business experts

Outstanding service

Unbeatable local knowledge, national resources, and personal service

The personal touch

We’ll get to know you and your business challenges

Industry leader

We’re the UK’s leading provider of phone systems


Do I have to pay for the system in one go?

No, you can spread your payments on a finance option. With finance leasing you can spread your payments and get the technology you need, when you need it. And you can keep upgrading so your business always benefits from the latest developments.

Can I take my number with me if I move?

With BT SIP Trunk you can, as this type of number is on the IP network rather than sitting in the local telephone exchange.

Can I use the system when I’m out of the office, or working from home?

Yes, with Remote Worker options people can stay productive when they’re working on the go or from home.

You can also use mobile ‘twinning’ so you never miss a call. Incoming calls ring on your desk phone and your mobile phone at the same time.

Can BT maintain my phone system?

Nearly all of our phone system customers ask us to maintain their system. All of our new phone systems include Proactive Remote Monitoring as standard. We have a cost effective range of maintenance options designed to suit your business operation and your budget. We can also maintain your non-BT phone systems.

Can I add extras such as voice recording?

Yes, we offer a wide range of range of phone system peripherals designed to improve customer service, protect staff and premises, and increase productivity. These include additional handsets, headsets, music/messaging on-hold, voice recording, secure door access solutions, unified communicator, and audio visual solutions.

Do you still sell the BT Quantum phone system?

We no longer sell the BT Quantum phone system. But we will continue to upgrade and maintain any existing systems for the foreseeable future.

Can my phone system ‘grow’ with me as my business expands?

We design our phone systems to allow you to grow as a business without worrying about the capacity of your system. Our systems are developed with the ‘ever-green’ concept in mind. Additional lines and extensions can be added as well as additional functionality like voice recording.

My small business takes orders by phone. Can a new system handle these calls in the same way a contact or call centre would?

Yes. The size of your business should not limit your ability to efficiently and effectively handle crucial customer calls. For example, call routing allows you to manage calls from wherever you are, so your customers get through to the person they want to speak to.

Will I be able to make SIP calls on my phone system?

BT phone systems (such as the Avaya IP Office and Mitel MiVoice) are compatible with BT Cloud Voice SIP. But if you have another phone system you could still take BT Cloud Voice SIP by using our BT SIP Trunk Gateway.

I’m a small business, would I need a receptionist to operate the system?

No, you don’t. With BT Secure Access solutions you can keep your buildings secure and welcome visitors with a BT phone system.


BTnet helped this business connect its customers

Managing calls and keeping pupils safe online

Our peripherals can make your phones work harder

Improve your customer service, protect your staff

Keep your business secure with our entry systems

Stay connected wherever you are in the office with Business DECT

Control your costs and improve customer service with CallAccountant

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