5 Reasons to Switch to a VoIP Phone System | AMVIA

The question for most UK businesses is no longer whether to move to business VoIP, but when. Openreach is retiring the copper telephone network, so the transition is coming regardless. But there are five commercial reasons to act now that stand on their own merit, even before you factor in the switch-off.

Reason 1: Will VoIP actually save money every month?

Yes — for most businesses, switching cuts the monthly phone bill significantly. Traditional systems stack up PSTN line rental, ISDN channel charges, on-premise PBX maintenance, and opaque call tariffs. Hosted VoIP collapses all of that into a single per-user fee, from £5.95 per user per month for a full-featured system.

For a 15-user business, moving from ISDN30 lines and a maintenance contract to a hosted phone system routinely saves £400–£800 per month (typical UK 2026 range). Over a two-year term, that is real money you can reinvest elsewhere.

Where the savings come from:

• No line rental — calls travel over your existing internet connection, not dedicated copper.
• No PBX maintenance — the platform is hosted and updated by the provider.
• Predictable billing — one per-user price instead of a tangle of rental, channel, and call charges.
• Cheaper calls — UK landline and mobile bundles are usually included.

Reason 2: Can staff work from anywhere with VoIP?

Yes. A VoIP phone system gives every user a full business phone on their laptop or mobile, anywhere they have an internet connection. Remote and home workers share the same extensions, call-forwarding rules, and voicemail as office staff. Customers dial one number and reach whoever is free, wherever they are.

That flexibility matters now hybrid working is standard. A legacy PBX bolted to one building cannot follow your team home, to a client site, or to a second office. For organisations standardised on Microsoft, Microsoft Teams calling turns the same Teams app people already use into the business phone — no second device, no separate login.

Reason 3: What features does VoIP add that legacy systems cannot?

VoIP delivers enterprise call handling — auto-attendants, call queuing, call recording, analytics, and IVR menus — as standard or low-cost add-ons. On old PBX hardware these needed expensive licences and engineers. Even a small team can present a professional, multi-option phone experience without big capital outlay.

CRM integration is the other capability legacy systems struggle to match. Hosted VoIP platforms integrate with Salesforce, HubSpot, and Microsoft Dynamics, logging calls automatically and showing caller details before you answer.

Because calls now ride your internet connection, the security of that connection matters more — which is why we treat VoIP security as part of the build, not an afterthought.

Reason 4: Does the PSTN switch-off make VoIP mandatory?

Yes. Openreach is systematically retiring the UK's copper telephone network, ceasing PSTN and ISDN lines exchange by exchange, with full migration to digital voice required by the end of January 2027 (Openreach). Any business still on copper will face a forced migration.

The choice is whether you migrate on your own terms — evaluating providers, negotiating contracts, choosing the right features — or get moved onto whatever product your provider is pushing at the time. Proactive migration almost always yields better pricing, a better-matched solution, and a smoother cutover. There is no upside in waiting; planning options like a SIP trunk or full hosted platform takes weeks, not days.

Independent regulator guidance on the migration timetable is published by Ofcom.

Reason 5: How easily does VoIP scale as you grow?

Effortlessly. Adding a user to a traditional PBX can mean buying a handset, ordering a line, and booking an engineer. On VoIP, adding a user is an online configuration change that takes minutes — and scaling back is just as simple, with no stranded hardware or line rental to carry.

The same applies to capability. As you grow you can switch on call-centre functions, extra integrations, or more call-recording storage without swapping platform. Multi-site businesses benefit most: a single multi-site VoIP deployment puts every office on one numbering plan and one bill.

When is the right time to switch?

There is no single perfect moment, but several triggers make switching sensible now: an approaching PBX end-of-life, a lease renewal, an office move, a period of staff growth, or a PSTN switch-off notice from your provider. If any apply, an independent VoIP review is worth a couple of hours of your time.

AMVIA works with UK businesses across all of these scenarios — assessing current telephony costs, identifying the right platform, and managing the end-to-end migration. Because voice now depends on your connectivity, we also size the underlying business leased line where call volumes or reliability demand it.