Barriers to VoIP adoption, and how to overcome them

'Call quality won't be as good'

This was a fair concern on early broadband, but full fibre connectivity and Quality of Service configuration now deliver call clarity that matches or beats traditional lines. The real driver of poor VoIP call quality today is an underspecified or contended internet connection, not the technology itself.

'We'll lose our phone numbers'

Number porting is a routine, well-established process. Geographic and non-geographic UK numbers move to a new provider with no downtime when planned properly, and the switch-off itself makes porting more common, not less reliable.

'It's too complicated to switch'

• A phased migration, piloting one team before a full rollout, avoids disruption
• Cloud platforms are configured through a web portal, not specialist engineering
• Providers typically manage porting, number setup and call flow design as part of onboarding
• Staff training usually takes an hour, since most interfaces resemble consumer messaging apps

'What happens if the internet goes down'

This is the one legitimate remaining concern, and it has a direct answer: a secondary connection, such as a 4G or 5G failover, keeps calls running if the primary line drops. Businesses that treat connectivity resilience as part of the phone system project, not an afterthought, do not experience this as a real risk.

'It costs more than what we have'

Once you add the maintenance contract, the ISDN line rental and the eventual forced upgrade when ISDN is withdrawn, on-premise systems are rarely cheaper over a three-year view. Cloud VoIP consolidates those costs into one predictable monthly fee and removes the hardware refresh cycle entirely.

The businesses still waiting

The remaining holdouts are mostly waiting for a forced deadline rather than a real technical blocker. With PSTN switch-off completing on 31 January 2027, waiting simply moves the project into a period with less provider availability and less room to negotiate.