SIP Trunk solutions in the United Kingdom: Future-proof, cost-effective & scalable.
Tailored SIP trunk solutions for UK businesses
Connect your PBX system to the PSTN via the internet
Add and remove extensions in seconds
Cost-effective setup and continued operation
Robust & reliable with automatic failover
Reduced call costs and per second billing
Standard and advanced communication features
Flexible month-to-month and 24-month contracts
A trusted SIP trunk provider in the United Kingdom
United Telecoms is dedicated to high-quality future-proof business telephony solutions, including VoIP landlines, SIP trunks, cloud PBX, and more.
Our SIP trunking solutions are sought after by businesses looking to upgrade their legacy PBX system to take advantage of the benefits and features of VoIP technology.
Our PBX & VoIP service areas in the United Kingdom include
Inner London
- Camden
- Hackney
- Hammersmith and Fulham
- Haringey
- Islington
- Kensington and Chelsea
- Lambeth
- Lewisham
- Newham
- Southwark
- Tower Hamlets
- Wandsworth
- the City of Westminster
- the City of London
Inner London
- Barking and Dagenham
- Barnet
- Bexley
- Brent
- Bromley
- Croydon
- Ealing
- Enfield
- Greenwich
- Harrow
- Havering
- Hillingdon
- Hounslow
- Kingston upon Thames
- Merton
- Redbridge
- Richmond upon Thames
- Sutton
- Waltham Forest
SIP trunks are ideal for small businesses and large multi-site corporates, offering a range of features to help you unify and streamline multi-channel communications.
To find out how we can enhance your communications with a SIP trunk solution, contact us. Get in touch via our national office number listed below or use the “chat now” button at the bottom right-hand corner of this page to find out more.
CONTACT US 033 1630 0516
What is SIP trunk?
SIP (Session Initiation Protocol) trunking is a way of providing telephone lines using data rather than fixed lines. It gives you the ability to make and receive calls using Internet Protocol (IP) technology without needing to completely replace your PBX.
SIP trunk and VoIP are similar technologies, both using IP technology to transfer voice calls, however, SIP trunking also supports voice, video, messaging and fax.
SIP trunks bridge the gap between the latest in telecommunications technology while utilising compatible legacy PBX infrastructure.
SIP trunking services offer a future-proof solution that is highly scalable, feature-rich, reliable and cost-effective. SIP trunk solutions are the ideal choice for businesses looking to upgrade their legacy telecommunications infrastructure and enhance their workflow.
Contact a friendly expert from our team to enquire about SIP trunking today.
Benefits of SIP trunking
SIP trunks allow you modernise your business telephony infrastructure and unlock a wide range of benefits to enhance your workflow and customer experience.
By connecting your legacy PBX system to the internet, your business can take advantage of the benefits offered by VoIP solutions. This includes cost-effective call rates, feature-rich functionality, effortless scalability, integrations with existing CRMS and more.
Explore the benefits of SIP services in more detail below, and submit your enquiry today.
Intuitive management portal
Easily manage your SIP trunk settings and features through an intuitive management portal. Our user-friendly interface allows you to update configurations, view call data, and control costs without the need for specialised training.
Username and password or IP authentication
e offer dual options for authenticating your SIP trunk: either via username and password or IP-based authentication. This gives you the flexibility to choose the method that best aligns with your security needs.
Fraud protection
Our SIP trunks come with built-in fraud protection mechanisms to help safeguard your communications infrastructure. Automated notifications and usage thresholds alert you to unusual activity, adding an extra layer of security.
Free web RTC - “click to dial”
Our service includes a free Web RTC feature, known as “Click to Dial,” allowing seamless one-click dialling directly from your web interface. This simplifies user interaction and can lead to more efficient customer engagement.
Feature-rich with call recording
SIP trunks offer a range of functionalities (including call recording) to unify and enhance voice, video and text-based communications. Empower your business to manage multi-channel internal and external interactions with ease.
Scale with ease
Add or remove extensions in a few clicks, without the installation or removal of any physical phone lines or infrastructure. Allow your phone system to adapt as your business evolves.
Cost-effective
SIP trunk solutions are more cost-effective than legacy PBX systems by reducing costs associated with physical hardware, installation, maintenance, line rentals, call rates and more.
Flexible month-to-month and 24-month contracts
As a top SIP trunking provider, we offer flexible month-to-month contracts and 24-month contracts to suit your needs and budget.
Integrate with existing systems: CRMs, mobile devices & more
Enhance your workflow by integrating your phone system with existing CRMs, mobile devices and other business tools or peripherals to achieve improved efficiency and customer experience.
Future-proof telephony infrastructure
Uplift your legacy PBX system to a future-proof SIP solution in preparation for the PSTN switch-off in 2025. Relying on VoIP infrastructure will enable you to expand your communication capabilities and stay up to date with the latest advancements in IP telephony.
Reliability and redundancies
SIP trunking offers high reliability. Redundancies can be built into the system to ensure that your communication remains uninterrupted, even in the face of technical issues, power outages and other issues.
HD Voice quality
SIP trunk solutions use your internet connection and VoIP technology to provide HD quality voice communications superior to traditional phone lines.
SIP trunk pricing options for your business
Choosing the right SIP trunk pricing plan is crucial for cost-effective, efficient business communications.
We offer various options, such as HV.Select SIP, Wholesale SIP, and SIP2Teams, that cater to your specific needs and support your communication workflow. Our plans allow you to streamline your telecommunications setup without compromising on features or functionality.
HV.Select SIP
£2 per user, £8 per SIP channel
Users per channel ratio: 4:1
HV.Select SIP is our hybrid voice solution, created in partnership with BT Wholesale.
It offers a complete suite of IP voice services that allow you to move your customers onto IP whilst retaining their existing PBX phone system equipment, embarking on the first step in their journey to a future-proof telecommunications system.
An important feature of this plan is inclusive minutes, providing pre-allotted talk time to help manage and predict communication costs.
ENQUIRE NOWWholesale SIP
£1.25 per user, £5 per SIP channel
Users per channel ratio: 4:1
Our Wholesale SIP trunking service, powered by Voiceflex, provides an excellent trunking solution that is competitively priced.
It offers flexibility for your businesses, from the type of authentication method you prefer to the proposition you would like to build: minutes or no minutes.
A key component of this plan is the pence per minute billing allowing you to pay only for the time you use – a cost-effective solution for managing expenses.
Enquire nowSIP2teams
£2.45 per user (0-79 users)
Desktop Phone Extension That Can Be Used From Any PC or Mac
SIP2Teams is an additional module which enables SIP channels, allowing MS TEAMS to become an active PSTN (public switched telephone network) system and provide a range of voice and data services.
SIP2Teams provides a straightforward billing approach, consolidating voice and data services into a single invoice for easier management to centralise and simplify telecommunications costs.
ENQUIRE NOWRequirements for SIP trunking services
Before diving into SIP trunking for your business, there are some key requirements you’ll need to meet to ensure smooth and high-quality communications.
Primarily, you’ll need compatible hardware, specifically a PBX system that supports IP-based services. Additionally, a stable and high-speed internet connection is crucial for optimal performance. Explore these essential elements in more detail and contact us to find out more about our SIP trunk solutions.
SIP Trunk hardware
The core component for SIP trunking is a PBX (Private Branch Exchange) system capable of integrating with IP-based services. Modern IP-PBX systems are more compatible with SIP trunking, although traditional PBX systems can also be adapted using VoIP (Voice over Internet Protocol) gateways.
Reliable Internet connection
A robust, high-speed (fibre or broadband) internet connection is essential for delivering quality voice communications. Your internet speed should have sufficient bandwidth to support multiple concurrent phone calls, in addition to your regular business data traffic.
Frequently asked questions about SIP trunking & SIP trunk providers
How does a SIP trunk work?
A SIP (Session Initiation Protocol) Trunk is a virtual phone line that facilitates voice communications over the internet, converting voice data into packets that are sent over an IP network.
Our SIP Trunking services seamlessly integrate with your existing PBX system, offering a reliable and cost-effective solution for your business communication needs. Contact us today to make the switch to this modern telephony solution.
How to configure a SIP trunk
Configuration requirements can differ based on your PBX system and the specific SIP provider you go with. Well-known systems like Cisco CallManager and Asterisk have unique procedures for configuring a SIP trunk.
Our technical team at United Telecoms provides comprehensive support to guide you through the configuration process, ensuring minimal disruption to your business operations. Contact us to consult with a specialist today.
How many concurrent calls can a SIP trunk handle?
The capacity for concurrent calls depends on your available bandwidth and the limitations set by your SIP trunk provider. It’s essential to assess these factors to know how many simultaneous calls your system can manage.
We offer scalable SIP Trunking solutions that can be tailored to meet your specific call volume needs, with a transparent assessment to ensure optimal performance. Contact us to discuss your requirements.
How much does a SIP trunk cost?
The cost of a SIP trunk can differ depending on your chosen provider, the volume of concurrent calls you require, and any extra services or features you select.
We offer flexible pricing plans designed to fit various business sizes and budgets. Contact our team today for a customised quote that suits your business needs.
What is the difference between a SIP trunk and SIP gateway?
A SIP Trunk provides a virtual connection from your PBX to the internet, whereas a SIP Gateway is a physical device that serves a similar purpose but also allows connection to traditional analogue telephone lines (PSTN network).
Whether you require a SIP Trunk or SIP Gateway, United Telecoms can guide you through choosing the solution that best aligns with your business needs. Consult with us today for expert advice.
How to test and check the status of a SIP trunk?
Many SIP providers offer diagnostic tools to assess the status and performance of your SIP Trunk. You can also conduct tests from within your PBX systems, like Cisco or Asterisk.
We can provide you with access to real-time monitoring tools that ensure the consistent performance and reliability of your SIP trunking services. Our support team can also help you with any queries related to the technical setup and maintenance associated with your SIP trunk solution. Contact us to find out more.
What are SIP trunk channels?
A SIP trunk channel is essentially a single route for a voice call. The number of channels you have will determine the number of concurrent calls your system can handle.
We provide SIP trunk solutions that are customisable to the number of channels you need, allowing for easy scalability as your business grows. Contact us today for a tailored SIP trunking solution 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
Epsom
Surrey
KT19 8GR
United Kingdom (UK)
Tel: 033 1630 0516
Tel: 020 3399 8011
Email: info@united-telecoms.co.uk
