Business Telephone Systems That Work as Hard as You Do
With the January 2027 ISDN and PSTN switch-off approaching, businesses require a transition to flexible digital telephony. We deploy and manage 3CX cloud-based phone systems. We supply a cost-effective platform billed based on simultaneous calls rather than per-extension licensing, resulting in a cost reduction compared to per-seat models, backed by straightforward 12-month terms.
Expert support
Lowthers VoIP
The majority of telecom providers lock businesses into inflexible five-year contracts. We deploy 3CX systems on 12-month terms, billed only for the simultaneous call capacity your business actually uses.
Our VoIP Offering
Managed telephone systems that fit how your business communicates
Although some businesses remain on traditional PBX or legacy systems, the majority must transition to a VoIP platform ahead of the January 2027 mandatory switch-off. We supply and manage 3CX unified communications platforms tailored to your operational requirements.
Rather than charging a licence fee for every user extension, our VoIP deployments are billed based on the number of simultaneous calls your business makes, reducing overall expenditure. Furthermore, we do not issue mobile phone contracts. The 3CX platform includes a comprehensive mobile application, allowing your team to operate remotely using their existing devices while maintaining standard business routing and caller ID presentation.
For businesses moving from a legacy system, we manage the transition to minimise disruption, ensuring your numbers come with you and your team remains operational.
How we support your business' VoIP needs
Managed from Day One
We set up, configure, and manage your VoIP system (including number porting, user setup, and remote working configuration) so it works correctly from the moment it goes live.
3CX Mobile Application
We do not provide mobile contracts. Instead, staff utilise the 3CX iOS and Android apps to make and receive calls via their business extension on their existing smartphones, without exposing personal numbers.
Integrated with Your IT Setup
We manage VoIP as part of your wider IT infrastructure, ensuring your telephone system integrates with your network, your Microsoft 365 environment, and your business processes.
What Our Managed VoIP Service Includes
12-Month Contracts
We operate strictly on 12-month contracts. We do not trap businesses in the industry-standard five-year agreements, ensuring you maintain commercial and operational flexibility.
Number Porting & Retention
Your existing business numbers come with you when you move to VoIP. We manage the porting process so there's no disruption to inbound calls and no need to communicate a number change to your clients.
Simultaneous Call Billing
We base pricing on the maximum number of concurrent calls your business requires. This significantly reduces costs compared to providers that charge a flat monthly fee for every individual user extension.
Integration with Your IT Infrastructure
We manage VoIP as part of your overall IT environment, integrating with your network configuration and Microsoft 365 where appropriate, rather than as a standalone system that sits outside your existing setup.
How We Work
Managing VoIP telephone systems as part of your wider IT infrastructure
Moving from a traditional landline or PBX system to VoIP is a straightforward process when it's properly managed but it requires someone who understands both the telephony side and the network infrastructure it runs on. We manage both.
We assess your current telephone setup, understand how your team communicates, and configure the VoIP system to match. That includes number porting, user setup, voicemail configuration, call routing, and integration with your existing IT infrastructure. The goal is a system that works correctly from day one, not one that requires weeks of adjustment after go-live.
For businesses with staff working remotely or across multiple sites, the 3CX platform provides a practical solution. By utilising the 3CX mobile application, every member of your team remains on the same phone system with the same internal extension — without the business needing to procure separate mobile phone contracts.
Ongoing management is part of the service. As your team grows, we add new users and adjust call routing. Because licensing is based on simultaneous calls rather than per-user, adding new staff does not automatically trigger new licence fees.
Ready to upgrade your business telephone system?
Whether you're moving from a traditional phone system, dealing with an unreliable VoIP setup, or equipping a team that works across multiple locations, book a free discovery call and we'll assess what your business needs.
We integrate digital communication infrastructure with your existing networks to provide stable, scalable, and metric-driven telecommunications.
some of our clients
A proven track record
Speak to us today for a FREE consultation
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Words from our clients
Lowthers have been a great partner, with the support/service evolving with the growing requirements of the business.
Head of IT
Very responsive and helpful, I appreciate the service provided, thank you
Company Director
I think the support from Lowthers is exceptional, so prompt and thorough, always impressed with their service and general helpfulness
People Advisor
Absolutely fantastic service - significantly better than the IT support at any other company I've worked for. Brilliant team at Lowthers, consistently go above and beyond.
Finance Team
How We Manage VoIP Telephone Systems for Your Business
From initial migration and number porting to remote working configuration and ongoing management, here's how our managed VoIP service works in practice.
System Setup & Configuration
We configure your VoIP system to match how your business communicates — call routing, user extensions, voicemail, and direct dial numbers — so everything works correctly from the moment it goes live.
Number Porting & Migration
We manage the migration from your existing phone system, including porting your current numbers, so there's no disruption to inbound calls and no need to update your business number externally.
3CX Mobile Integration
We configure the 3CX application for remote staff, allowing them to use their business extension on their existing smartphones without exposing personal contact details or requiring mobile contracts.
IT Infrastructure Integration
We manage VoIP as part of your wider IT setup, integrating with your network and Microsoft 365 environment where appropriate, rather than as a separate system with a separate support contact.
Ongoing System Management
As your team changes, we update the system, adding users, reassigning numbers, and adjusting call routing. Your telephone system is managed, not left to you to administer.
Frequently Asked VoIP Questions
Can't find the answers you're looking for?
Get in TouchVoice over Internet Protocol (VoIP) routes telephone calls over your internet connection rather than through a traditional phone line. It's more cost-effective than legacy landlines, more flexible for remote and multi-site working, and easier to manage as your team grows or changes. Most UK businesses are moving to VoIP as traditional PSTN lines are phased out.
Yes. We manage the number porting process, which transfers your existing business numbers to the new VoIP system. There's no need to update your stationery, website, or email signatures, and no disruption to inbound calls during the transition.
No, we do not provide mobile network contracts. The 3CX VoIP platform includes a mobile app, allowing staff to install the application on their current smartphone, take their extension with them, and make or receive calls as if from the business number without exposing their personal details.
Traditional providers charge a monthly fee for every user or extension. With 3CX, we assess how many concurrent calls your business makes at peak times and base the system capacity on that metric. This consistently results in a cost reduction.
We manage it on an ongoing basis. As your team changes — new starters, leavers, internal moves — we update the system accordingly. You don't need to administer the telephone system yourself; ongoing management is part of the service.
We operate on a standard 12-month contract. The majority of telecom providers require a five-year commitment, but we focus on providing flexible, scalable agreements without trapping you in a long-term contract.
Why Choose Lowthers for Your Managed VoIP System
We manage VoIP as part of your wider IT infrastructure — not as a standalone telephone product with a separate support number. That means your phone system is managed by the same team that looks after your network, your Microsoft 365 environment, and your IT support. One point of contact, no conflicting suppliers, and a team that understands how your whole setup fits together.
Our Services