5 Reasons to Switch to a VoIP Phone System | AMVIA

The Case for Switching to VoIP

The question for most UK businesses is no longer whether to switch to VoIP, but when. The retirement of the UK's copper telephone network makes the transition inevitable. But there are five strong commercial reasons to switch now rather than waiting — reasons that stand on their own merit regardless of the PSTN switch-off.

Reason 1: You Will Save Money Every Month

Traditional business phone systems carry significant recurring costs: PSTN line rental, ISDN channel charges, on-premise PBX maintenance, and call tariffs that can be opaque and expensive. Hosted VoIP simplifies this into a single per-user monthly fee — typically £8–£18 per user per month for a full-featured system.

For a business with 15 users, moving from a legacy system with ISDN30 lines and maintenance contracts to hosted VoIP routinely saves £400–£800 per month. Over a two-year contract, that is a meaningful saving that can be reinvested elsewhere in the business.

Reason 2: Your Staff Can Work from Anywhere

A VoIP phone system gives every user a fully featured business phone on their laptop or mobile, wherever they have an internet connection. Remote workers and home workers use the same extensions, call forwarding rules, and voicemail as office-based colleagues. Customers call one number and reach whoever is available, regardless of where they are working.

This flexibility matters in a business environment where hybrid working is now standard. A legacy PBX tied to a physical location cannot adapt to how teams actually work today.

Reason 3: You Get Features Your Current System Cannot Match

Professional call features — auto-attendants, call queuing, call recording, analytics, IVR menus — used to require expensive enterprise PBX hardware. On a hosted VoIP platform, these are included as standard or available as low-cost add-ons. Even a small business can present a professional, multi-option telephone experience to customers without significant investment.

CRM integration is another capability that traditional systems cannot provide without costly add-ons. VoIP platforms routinely integrate with Salesforce, HubSpot, and Microsoft Dynamics — logging calls automatically and showing caller information when the phone rings.

Reason 4: The PSTN Switch-Off Makes It Mandatory

BT's Openreach is systematically retiring the copper telephone network across the UK. Traditional PSTN and ISDN lines are being ceased exchange by exchange. Any business still on copper lines will eventually face a forced migration. The choice is between migrating on your own terms — evaluating providers, negotiating contracts, choosing the right features — or being moved by BT to whatever product they are promoting at the time.

Proactive migration typically results in better pricing, a better-matched solution, and a smoother transition than a reactive one. There is no benefit in waiting.

Reason 5: It Scales Easily as You Grow

Adding a new member of staff to a traditional PBX system might mean purchasing a new handset, ordering a new line, and scheduling an engineer visit. On a VoIP system, adding a user is an online configuration change that takes minutes. Scaling back is equally simple — there is no unused hardware or line rental to carry.

This scalability also applies to features. As your business grows, you can add call centre functionality, additional integrations, or increase storage for call recordings without upgrading hardware or changing platform.

The Right Time to Switch

There is no single right moment, but several triggers make switching particularly sensible: an approaching PBX end-of-life, a lease renewal, an office move, a period of staff growth, or receiving a PSTN switch-off notice from BT. If any of these apply to your business, an independent VoIP review is a worthwhile investment of a couple of hours.

AMVIA works with UK businesses across all these scenarios — assessing current telephony costs, identifying the right VoIP platform, and managing the end-to-end migration.