VoIP · 3CX Phone Systems
Deploying 3CX Unified Communications for Your Business
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. Our service supplies a cost-effective, highly flexible platform billed based on simultaneous calls rather than per-extension licensing. This structure consistently results in a cost reduction compared to legacy per-seat models, backed by straightforward 12-month terms.
Lowthers VoIP Integration Support
The majority of telecom providers lock businesses into inflexible five-year contracts. We deploy 3CX systems on 12-month terms, billed only for the call capacity your business actually uses.
What Our 3CX System Management Covers
We manage the full deployment of your 3CX unified communications platform — from configuring the simultaneous call licensing to deploying softphones and mobile applications across your workforce.
Mobile Application Routing
Staff can make and receive calls via the 3CX iOS and Android apps. This allows them to use their business extension anywhere without exposing their personal mobile numbers.
Desktop & Web Clients
The platform includes native softphone clients for Windows and Mac, allowing staff to handle all calls, video meetings, and internal chat directly from their workstations using a headset.
12-Month Contracts
We operate strictly on 12-month contracts. We do not utilise the industry-standard five-year agreements, ensuring your business maintains commercial and operational flexibility.
How 3CX Architecture Works
Unified communications managed within your IT infrastructure
3CX is a software-based PBX that replaces traditional hardware phone systems. Rather than assigning a paid licence to every single desk phone or employee, the 3CX architecture operates on a simultaneous call model. We assess your peak call volume and configure the SIP trunk capacity accordingly. This prevents your business from paying monthly fees for extensions that are rarely in use simultaneously.
Because 3CX is a unified communications platform, it does not rely solely on physical desk phones. It integrates voice routing, video conferencing, live website chat, and digital messaging into a single centrally managed environment. This reduces the number of disparate communication tools your IT environment needs to support.
The UK's public telephone network (PSTN) is being phased out, and all traditional analogue and ISDN lines will cease to function by January 2027. 3CX operates entirely via your internet connection (VoIP), ensuring your business is fully compliant and unaffected by the switch-off.
Furthermore, we do not issue mobile phone contracts or physical SIM cards for business communication. Instead, the 3CX platform connects to your users' existing mobile devices via a dedicated application. This routes calls over Wi-Fi or mobile data through the central PBX, masking personal contact details and ensuring all business communications remain logged and managed on your central platform.
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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 simultaneous call billing is more efficient than per-extension pricing
Traditional telephony providers scale their commercial models by charging a monthly fee for every active user or desk phone. In reality, a business with 50 employees rarely has 50 people on the phone at the exact same moment. 3CX licenses are sized by the number of simultaneous calls required. If your peak traffic is 16 concurrent calls, your system is sized for 16 calls — regardless of whether you have 20, 50, or 100 extensions registered. This technical efficiency results in a direct cost reduction for the business.
Supporting remote work without exposing personal mobile numbers
Issuing mobile phone contracts for every field worker or remote employee is an unnecessary overhead. The 3CX platform removes this requirement by routing calls to an iOS or Android application installed on the user's existing smartphone. Inbound calls to the office can be routed to the mobile app, and outbound calls made from the app display your standard business caller ID. Employees remain connected to the business infrastructure without ever exposing their personal contact details.
Our Integration Approach
How we configure and deploy 3CX for your business
We start by auditing your current telephone setup to determine your required simultaneous call capacity. We map out how your team communicates — ring groups, digital receptionists (IVR), call queues, and out-of-hours routing. This dictates the system configuration, ensuring the PBX operates efficiently from deployment.
Before porting numbers, we configure the SIP trunks and build the 3CX environment on stable cloud infrastructure. We deploy the necessary softphone clients to your desktop machines and assist staff with activating the mobile applications.
Number porting and system testing are completed before your legacy system is disconnected. After go-live, we manage the infrastructure on an ongoing basis. As your team grows, you can add unlimited extensions to your 3CX system without increasing your licensing costs, provided your simultaneous call volume remains within the agreed capacity.
Capacity Auditing
We review your peak call traffic before configuration to ensure your simultaneous call licensing is appropriately sized, preventing overspending on unnecessary capacity.
Application Deployment
We configure and deploy the 3CX desktop softphones and mobile applications, ensuring your staff are connected and operational before your legacy system is switched off.
Scalable Extension Management
As your business expands, we configure new users and extensions at no additional licence cost, scaling the system purely on your simultaneous call requirements.
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