The PSTN switch-off is quickly approaching. Is your business ready?

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A missed call to a legal practice, a care provider or a busy logistics office rarely feels like a technical issue. It feels like a lost instruction, an unanswered concern or a customer choosing to call elsewhere. That is why a hosted phone system review should look beyond handset features and focus on whether communications will keep supporting the way your people actually work.

Hosted telephony has become a practical route away from ageing on-site systems, particularly as the UK PSTN switch-off continues. Calls are delivered over an internet connection, while users can make and receive calls through desk phones, mobiles, softphones and, where appropriate, collaboration platforms. The right system can give a business more flexibility and better visibility. The wrong one can introduce avoidable disruption, unclear call routing and support gaps when they matter most.

What a hosted phone system should solve

A useful review starts with the problems the business needs to address, not a long list of functions. For some organisations, the priority is giving hybrid staff a consistent business number wherever they are working. For others, it is making sure calls to a reception or service desk are answered promptly, even when the usual person is unavailable.

A hosted phone system should make it easier to route calls to the right person, department or site; manage overflow during busy periods; maintain continuity if a location cannot be used; and add or move users as the organisation changes. It should also provide clear controls for administrators without forcing the team to rely on a telecoms specialist for every routine adjustment.

The needs will vary by sector. An estate agency may require rapid call handling and mobile access for negotiators. A healthcare organisation may place greater weight on appropriate call management, continuity and careful handling of sensitive communications. A manufacturer may need reception, warehouse and office teams to remain reachable across different locations. A review is valuable because it exposes these operational differences before a system is selected.

Hosted phone system review: the areas that matter

Call quality begins with connectivity

Hosted voice is dependent on the network carrying it. A provider can supply capable phones and well-designed call flows, but poor broadband, Wi-Fi coverage or local network configuration can still affect conversations. Symptoms such as delay, broken audio or calls dropping are not simply inconveniences when staff are speaking to customers, suppliers or colleagues.

Assess the available connection at each site, including the number of people using it and the other services competing for bandwidth. A larger office may need planned capacity and traffic prioritisation so voice calls are treated appropriately. Home and mobile workers also need realistic guidance on the connections they use. The aim is not to promise perfect conditions everywhere, but to identify risks early and put sensible resilience in place.

Continuity deserves equal attention. Ask what happens if the main internet connection fails, a site loses power or a key team member is absent. Call forwarding, mobile applications, alternate routing and secondary connectivity can help preserve customer contact, but they need to be designed around real responsibilities. A contingency plan that nobody understands is not a continuity plan.

Call handling should reflect the customer journey

Auto attendants, hunt groups, time-based routing, voicemail-to-email and call queues are standard capabilities. Their value depends entirely on how they are configured. A caller should not have to navigate a maze of options to reach a helpful person, and a queue should give staff enough information to respond properly when demand rises.

Review current call patterns before deciding on menus and groups. Which calls must reach a person immediately? Which enquiries can be directed to a specialist team? Where do calls currently get abandoned? Reception and customer service teams often know the answers, making their input essential.

It is also worth considering out-of-hours handling. A professional recorded message, an emergency escalation route or a planned diversion may be appropriate, depending on the service. The best approach is the one that matches the organisation’s commitment to its customers, rather than the one with the most options.

Flexibility must not weaken control

One attraction of hosted telephony is that staff can use a business identity from different devices and locations. This supports hybrid working and can reduce the need to share personal mobile numbers with customers. However, flexibility should sit alongside clear user permissions, secure sign-in arrangements and straightforward administration.

Check how easily managers can add users, amend call groups or apply temporary diversions. Consider whether the system supports the mix of desk-based, mobile and remote roles in the business. A solution that works well for a ten-person office may need a different structure when there are multiple sites, shift patterns or customer-facing departments.

Growth is not the only reason to think about scale. Organisations also need to adapt to seasonal demand, mergers, office moves and changes in working practices. A hosted platform should support those changes without requiring a wholesale replacement every time the business evolves.

Integrations should earn their place

Telephony integrations can reduce duplicated work and provide useful context before a call is answered. Microsoft Teams telephony, for example, may suit businesses already using Teams as a central workspace. Contact centre capabilities can help teams manage queues, reporting and more complex customer interactions.

The trade-off is that integrations introduce additional design and support considerations. Not every team needs every integration, and adding tools simply because they are available can make daily work harder. Review the systems employees already rely on, then focus on the points where better connection between them would save time, improve response quality or reduce missed information.

For customer-facing teams, reporting can be particularly useful. Call volumes, wait times, abandoned calls and answer rates can reveal where staffing or routing needs attention. These measures should support better service, not encourage staff to treat every conversation as a target to be rushed.

Support and migration are part of the system

A phone system is tested most severely when something changes or goes wrong. Before making a decision, establish who will support the service, how faults are handled and whether help is available from people who understand the original design. A friendly team that knows the business can be as valuable as a feature on a specification sheet.

Migration also requires careful planning. Most businesses will want to retain their existing telephone numbers, so number porting needs to be managed with accurate records, agreed timescales and a clear communication plan. There may be a period when old and new arrangements need to work alongside each other, particularly for larger sites or complex call flows.

Training should be proportionate and role-based. Reception staff may need confidence with call transfers, presence and queues, while managers need to understand reporting and administrative controls. Short, practical sessions before go-live are often more effective than leaving employees to work out unfamiliar functions during a busy day.

Questions to ask before choosing a provider

The right provider should be comfortable discussing limitations as well as benefits. Ask how they assess connectivity, how they plan resilience, and how they will document call flows before the change takes place. Ask who owns the process for number porting and what support will be available during the transition.

It is also sensible to ask how changes will be managed after launch. Businesses do not stand still, and a provider should be able to explain how new users, locations and changing call requirements will be handled. Look for clear accountability, accessible communication and recommendations grounded in your operations rather than a standard package.

A demonstration should follow a realistic scenario. If a customer calls reception while the team is already busy, what happens? If an employee works from home, how do they present the business number? If broadband at one site fails, where do calls go? Practical answers will tell you more than a generic feature tour.

Make the review a business conversation

Telephony decisions are sometimes left entirely to IT because they involve networks and devices. In practice, the most successful projects involve operations, customer service, finance, leadership and the people who answer calls every day. Each sees a different part of the risk and opportunity.

RPS Telecom approaches hosted telephony as a managed change, with expert guidance around connectivity, number retention, call design and user adoption. That approach matters because the goal is not merely to replace a phone system. It is to keep customers reaching the right people while giving the business a communications platform that can support what comes next.

A considered review creates confidence before the first handset is changed. Start with the calls your business cannot afford to miss, map the people and processes behind them, and choose a solution and support partner that can protect those conversations through every stage of change.