VoIP · Managed Telephone Systems
A Managed VoIP Telephone System for Your Business
A telephone system that drops calls, doesn't support your remote workers, or costs more than it should in line rental isn't serving your business. We manage Voice over Internet Protocol (VoIP) telephone systems for businesses looking for a reliable, cost-effective alternative, set up correctly from day one and maintained on an ongoing basis.
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Lowthers Managed Telephone Systems
Traditional landlines are being phased out across the UK. We manage the transition to VoIP for businesses that want it done properly, without the disruption, and with their numbers intact.
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What Our Managed Telephone System Service Covers
We manage the full lifecycle of your VoIP telephone system, from initial setup and number porting through to remote working configuration and ongoing management as your team changes.
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Number Porting
Your existing business numbers transfer to the new VoIP system. We manage the porting process so inbound calls are unaffected during the transition and you don't need to update your number externally.
Remote & Multi-Site Working
Staff working from home or across multiple locations use the same VoIP system with the same numbers and extensions as office-based colleagues, no separate numbers, no missed calls.
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Ongoing System Management
We manage the telephone system as your team changes, adding users, reassigning extensions, adjusting call routing, and resolving connectivity issues as part of the managed arrangement.
How Managed VoIP Works
VoIP telephone systems managed within your IT infrastructure
VoIP routes telephone calls over your internet connection rather than through a traditional phone line. For the system to work reliably, the underlying network needs to be properly configured, sufficient bandwidth allocated for call traffic, quality of service settings in place to prioritise voice data, and firewall rules that permit the necessary traffic without creating security gaps.
We manage VoIP as part of your wider IT infrastructure, which means network configuration, firewall settings, and VoIP system management are handled by the same team. That matters because a VoIP system configured without regard for the network it runs on will underperform and the symptoms (dropped calls, poor audio quality, connection failures) are frustrating to diagnose when the telephone system and the network are managed separately.
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For businesses moving from a traditional Private Branch Exchange (PBX) or legacy landline system, the transition to VoIP is managed carefully to avoid disruption. We configure the new system in full before switching, port existing numbers before go-live, and test the environment with your team before the old system is decommissioned. Most transitions are completed without your clients or contacts noticing any change.
The UK's public telephone network (PSTN) is being phased out, traditional analogue and ISDN lines will no longer be supported after 2027. For businesses still on traditional lines, moving to VoIP is a transition that needs to happen, we manage it at the right time and in the right way for your business.
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A proven track record
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Choosing the right IT partner involves many moving parts. The best way to see if we’re a good fit is a quick, no-pressure introductory call.
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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
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
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
Why a VoIP system managed alongside your IT performs better than one that isn't
A VoIP system is a network application, its performance depends on the network it runs on. When a telephone system is managed by a separate provider from the business's IT infrastructure, issues that span both, a firewall rule blocking call traffic, insufficient bandwidth allocation, or a network configuration change that affects call quality, are slow to diagnose and slower to resolve. We manage both, which means problems are found and fixed faster and the system is configured consistently from the start.
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Why businesses choose Lowthers for a managed VoIP telephone system
We manage VoIP telephone systems as part of the broader IT infrastructure we look after for businesses, not as a standalone telephony product with a separate support number. That means your telephone system is managed by the same team that knows your network, your firewall, and your IT setup. One point of contact, no conflicting suppliers, and a system that's configured correctly because the people managing it understand the infrastructure it runs on.
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Our VoIP Management Approach
How we set up and manage VoIP telephone systems for your business
We start by understanding your current telephone setup and how your team communicates. How many users need to be on the system? Are staff working from home or across multiple sites? Do you need call queuing, auto-attendant, or specific call routing? The answers shape the configuration, rather than applying a default VoIP setup and leaving you to customise it afterwards.
Before anything is connected, we review your network to confirm it can support VoIP reliably. That includes checking bandwidth availability, configuring quality of service settings to prioritise call traffic, and reviewing firewall rules to ensure VoIP traffic is handled correctly. For businesses with infrastructure we're already managing, this is straightforward, we already know what's in place.
Setup, number porting, and testing all happen before the old system is switched off. We configure the new VoIP system in full, port existing numbers, and run call testing with your team to confirm everything works correctly, before any announcement is made and before the old system is decommissioned. After go-live, we manage the system on an ongoing basis: user changes, call routing adjustments, and connectivity troubleshooting as needed.
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Supporting Businesses with reliable & Flexible IT Support
Network Review Before Setup
We review your network before configuring VoIP, confirming it can support call traffic reliably and making any adjustments needed before the system goes live.
Ported & Tested Before Switch
Numbers are ported and the system is tested in full before your old telephone system is decommissioned, so your business never has a period without a working phone system.
Managed as Your Business Changes
We update the system as your team evolves, adding users, reassigning numbers, and adjusting routing without you needing to administer the telephone system yourself.
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