Future-proof business landlines, SIP & VoIP phone systems in the United Kingdom

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A trusted provider of SIP trunks & business VoIP systems in the United Kingdom

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In 1985, United Telecoms was established to provide reliable and affordable telephony solutions. 

As a leading provider of business phone systems in the United Kingdom, we cater to a wide range of businesses across industries.

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We offer futureproofed landlines, business telephone numbers, SIP trunking, end-to-end VoIP, and cloud-hosted PBX solutions for businesses ranging from local small businesses to larger enterprises with operations in many counties across the UK.

Contact us to get expert help finding the perfect telephony solutions for your business.

Get in touch using our national office number provided below, or the “chat now” button in the bottom right hand corner of this page.

Contact us 033 1630 0516

Futureproof business telephone lines

By 2025, traditional phone systems relying on copper and WLR lines will become redundant. Switching to a futureproof business phone system in the near future is imperative for all businesses in the United Kingdom. 

Utilising a seat on a cloud-hosted PBX or SIP trunking, you can futureproof communications channels & take advantage of the benefits of IP telephony. We make the transition easy, offering tailored telecommunication solutions for your business.

These benefits include a range of standard and advanced features for streamlining communications, crystal clear call quality, increased scalability (as lines can be added and removed in few clicks) and more.

Learn more about our business telephone lines and contact us to speak to an expert today.

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United Voice Cloud Hosted PBX

United Voice Cloud is a leading customisable Hosted PBX system that can be customised to meet the needs of individual businesses and encompasses unified communications technology.

United Voice Cloud provides a wide range of benefits including an array of communication features, the ability to retain your number, cheaper call rates, increased scalability, the choice to use softphones or physical IP handsets and more

Available in 3 packages (essential, classic and pro) to suit your needs. Explore United Voice Cloud Hosted PBX in more detail and contact us to submit your custom enquiry.

Explore United Voice Cloud Hosted PBX

SIP Trunks with HV.Select SIP

SIP trunking enables businesses to integrate IP telephony and unified communications capabilities with their existing PBX, without moving over to the cloud completely.

HV.Select SIP is a hybrid voice solution created in partnership with BT Wholesale. HV.Select SIP provides businesses with a full suite of IP telephony communication capabilities while allowing a business to retain their existing PBX equipment. 

United Telecoms also offers HV. Select’s Wholesale SIP which provides simple SIP trunking.

Learn more about our business SIP trunking solutions and contact us to find out more.

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Business telephone numbers

United Telecoms helps businesses obtain numbers throughout regions in the United Kingdom.

We help businesses obtain numbers throughout the United Kingdom, including:

These numbers can be used by phone systems that rely on SIP trunks or cloud PBX systems

Contact us to find out more about our business telephone numbers

Number porting for businesses throughout the UK

United Telecoms helps businesses transition from landlines to VoIP, as the 2025 deadline for the PSTN and WLR3 phase-out draws near.

We provide detailed guidance to help organisations address any potential obstacles and ensure a smooth transition to VoIP.

VoIP allows businesses to manage voice communications using their broadband or fibre connection instead of traditional landlines. It also provides amazing features that help businesses streamline communications and enhance their capabilities.

VoIP is more cost effective and can reduce costs associated with traditional phone systems, including landline rental, hardware installation, call rates and more.

Speak to a specialist that can help you port your landline number to VoIP. You can also explore our guide: to port landline numbers to VoIP in the United Kingdom in 2023 which breaks down the steps involved during the porting process.

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Purchase options for business phone lines, SIP & VoIP Phone Systems

At United Telecoms, we offer flexible payment options for business PBX systems. You can either purchase your phone system outright via BACS payment or opt for a fixed-term lease.

SIP & VoIP system fixed-term rentals and upfront purchases

Purchasing equipment outright through a BACS payment enables businesses to take immediate ownership of their hardware and potentially save on the total cost of the system.

Choosing to lease the equipment affords businesses the chance to sidestep substantial one-time payments while enjoying increased flexibility in terms of upgrades, expansions, and maintenance.

Lease terms for VoIP & Cloud PBX systems may range between 12 – 60 months depending on your requirements and budget. Short-term leasing options are also available. 

Contact one of our specialists to learn more about our pricing and purchase options for on-premise and cloud business phone systems.

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Explore some of the benefits of our futureproof business phone systems

Cloud-based and hybrid PBX solutions relying on SIP trunks unlock a wide range of features and benefits due to IP telephony.

Explore some of the key benefits below, and contact us to find out how we help your business enhance its communications.

Frequently asked questions about cloud-based and hybrid business SIP & VoIP systems

Finding the right SIP trunk provider is about understanding your business needs and current infrastructure, and finding a provider that can meet your requirements. A reputable provider will offer a variety of features to streamline communications, enhance productivity, and provide scalability for your business. Look for a provider like United Telecoms that offers a range of IP telephony capabilities, flexibility, and end-to-end support. Contact us to find out more.

To set up a business phone number in the UK, you may need to find a reputable provider that can help you set up a geographic or virtual number to manage your business communications. United Telecoms helps set up business telephone numbers throughout the UK that can be used with cloud PBX and SIP trunk solutions.

Getting a virtual business phone number involves selecting VoIP or cloud-based phone service (such as United Voice Cloud Hosted PBX). This type of service allows you to choose a number that is cloud-hosted. You can then make and receive calls over the internet, using either a physical IP handset or a software-based phone on your computer or mobile device.

VoIP stands for Voice over Internet Protocol. It is a technology that allows voice communications to be conducted over the internet. VoIP provides a wide range of features for managing voice communications while reducing costs, improving scalability and much more.

VoIP works by converting voice signals into digital data and transmitting it over the internet. It allows you to make calls directly from a computer, a VoIP phone, or a traditional phone connected to a special adapter. It offers a number of benefits including lower costs, enhanced functionalities, and the ability to handle more than just voice calls.

For VoIP, you’ll need a broadband internet connection, a router, and a VoIP-enabled phone or softphone extension to make and receive calls.

Some businesses may also require a VoIP gateway if they have traditional phone systems in place.

Requirements for business telephone system installation

Installation requirements vary depending on the type of phone system you choose, such as a hybrid IP PBX system (SIP trunk), or a cloud-based phone system.

We explore the installation requirements in detail for these solutions on our PBX installation page and you can reach out to us for further assistance.

Physical phone lines: Required for a traditional phone system and hybrid PBX systems. The number of lines you’ll need depends on the number of users required.

Hardware: For analogue PBX systems and hybrid PBX systems, you will need a PBX main unit and other essential hardware components.

Cabling: Desk phones and base stations for cordless phones require proper physical connections to your PBX system, which requires correctly laid-out cabling within your premises. The extent of your cabling needs may differ for installing cloud based phone systems.

Location: Location is a crucial factor as it can influence the type of phone system and network solution that best suits your communication needs. If you’re implementing a VoIP phone system, you will need to utilise a reliable internet connection (broadband or fibre) to facilitate communication.

Handsets/peripherals: Existing PBX handsets need to be compatible with your system or new handsets can be purchased, such as analogue, digital, or VoIP phones, to help manage your communications. Handsets and peripherals must be selected based on compatibility with your system and their ability to manage voice communications.

Got questions? Contact our experts today.


We service the following locations across London and the United Kingdom

Greater London: City of London, Hounslow, Barking and Dagenham, Islington, Barnet, Kensington and Chelsea, Bexley, Kingston upon Thames, Brent, Lambeth, Bromley, Lewisham, Camden, Merton Croydon, Newham, Ealing, Redbridge, Enfield, Richmond upon Thames, Greenwich, Southwark, Hackney, Sutton, Hammersmith and Fulham, Tower Hamlets, Haringey, Waltham Forest, Harrow, Wandsworth, Havering, Westminster and Hillingdon.

What Our Customers Say

“Once we approved the installations we were kept up to date daily with the levels of progress on our various sites and were very impressed with the final installation”

Spear Properties


Get In Touch

London Office

2 Osborne Way
KT19 8GR
United Kingdom (UK)

Tel: 033 1630 0516
Tel: 020 3399 8011

Email: info@united-telecoms.co.uk

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