Services/Voice services

Voice Services

Keep every conversation moving

Everycallisanopportunitytohelpacustomer,solveaproblem,ormoveworkforward.Whenlegacyphonelines,rigidsystems,ormissedcallsgetintheway,theimpactreachesfarbeyondIT.

Keeping people connected has also become more complicated. Your teams may be working across different offices, devices, and locations, while customers still expect a fast, consistent response whenever they call.

We’re here to simplify it.

From IP voice and cloud-hosted telephony to intelligent inbound call management, we design services around your people, customers, and existing technology. Then we help you migrate, manage, and evolve them - giving you resilient communications without the telecoms headache.

Related services

Flexible, future-ready voice services that help your teams communicate clearly and give every caller a better experience.

IP voice

Flexible, future-ready voice services that help your teams communicate clearly and give every caller a better experience.

  • Replace legacy PSTN and ISDN services with IP-based calling

  • Resilient voice delivered through trusted carrier relationships

  • Expert support from migration and onboarding to ongoing management

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Inbound call management

Helping you route calls intelligently, respond faster, and deliver a more consistent customer experience.

  • Tailored call routing and seamless handoffs between teams

  • Real-time visibility into call activity and service performance

  • Integrations with CRM platforms and everyday business tools

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Nasstar Talk

Bringing business calling and collaboration together through a flexible, cloud-hosted communications platform.

  • Make and receive calls using desk phones, computers, or mobile devices

  • Manage call routing, voicemail, hunt groups, and auto attendants

  • Add capabilities such as recording, analytics, and mobile integration

Managed Services

Moving to modern voice involves more than switching on a new platform. Numbers need to be migrated, users need to be supported, call flows need to remain accurate, and performance must be monitored as the business changes.

Our managed voice services take care of that ongoing complexity. From solution design and migration to carrier coordination, service management, and future changes, we’ll help keep your communications aligned with your business.

That means fewer distractions for your IT team and a more reliable experience for the people making and receiving calls.

End-to-end ownership

We help coordinate design, migration, number porting, carriers, platforms, and ongoing service requests.

Greater scalability

Add users, numbers, locations, and call-handling capabilities as your organisation and customer needs change.

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Whatourexpertsays...

Voice is no longer just a phone system. It’s how customers reach you, how teams stay connected, and how organisations keep working across different locations. We design voice services around those interactions, helping customers replace legacy technology, improve resilience, and create a better experience for every caller and user.

Rada SookramanienVoice Product Manager (Secure Networks), Nasstar

Why choose Nasstar?

Modernising voice can involve ageing infrastructure, number migrations, multiple carriers, and services that the organisation cannot afford to lose. We bring everything together through one clear strategy and stay involved throughout the journey.

Voice migration needs careful planning. Numbers must move at the right time; integrations need to work, and critical call routes must remain available. We’ll assess your existing environment, plan the transition, and coordinate the different parts of the service, helping you modernise without creating unnecessary disruption.

An internal collaboration call and an urgent customer enquiry have very different requirements. We consider who is calling, why they're calling, and how the conversation should be handled. That helps us design voice services around genuine user and customer journeys rather than simply replacing one phone system with another.

Legacy estates often contain different lines, platforms, contracts, and providers. We help bring those elements into a more coordinated environment, combining IP voice, hosted telephony, and inbound call management where appropriate. This creates clearer ownership and makes future changes easier to manage.

You can’t improve a call experience without understanding what is happening. Our solutions provide tools for managing users, numbers, routing, and call flows, alongside reporting that helps you identify demand, missed calls, and potential service improvements. Myriad provides real-time visibility and centralised control over inbound services.

Voice remains business-critical, even when the technology underneath it changes. Nasstar’s SIP-enabled voice service is supported by resilient multi-carrier networks, while Nasstar Talk uses redundant cloud infrastructure and failover capabilities.

Case studies

We’ve helped organisations across multiple sectors to modernise voice systems, strengthen resilience, and create better experiences for callers and employees.

Retail

The Works

Blue light

Leicestershire Fire and Rescue Service

Professional services

Prospect Union

What others have to say...

"With the ambition to have 600 stores by next year, we needed to know we had a reactive partner that could provide a seamless and scalable IT solution to match. A trustworthy partner who has the experience and expertise to fulfil our requirements and support our expansion plans. Nasstar is exactly the right fit for our business. Their support enables us to move forward as a business and remain ahead of the game in the competitive retail sector."

Tom Scott

IT Director

•

The Works

The PSTN switch-off

The UK’s analogue Public Switched Telephone Network is due to be retired on 31 January 2027. Traditional landlines, ISDN services, and equipment that still relies on legacy lines will need to move to digital alternatives.

This is about more than replacing desk phones. Alarms, payment terminals, lift lines, entry systems, fax machines, and other critical equipment may also rely on the old network.

Whether you’re already migrating or are just getting started, our experts can help you:

  • Identify services that may be affected

  • Find the right connectivity and IP voice replacements

  • Build a practical migration plan

  • Move your connectivity with minimal disruption

  • Create new opportunities from the transition

Let’s make the switch straightforward.

Voice FAQs

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Business voice services enable employees and customers to communicate using digital, internet-based technology.

They can include IP voice, SIP trunking, hosted VoIP, unified communications, and inbound call management. These services can replace traditional PSTN and ISDN lines while providing greater flexibility across locations and devices.

The right solution depends on your existing phone system, number of users, call volumes, locations, customer journeys, and future plans.

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Latest insights

Thought leadership, insights, and opinions from our experts - all in one place.
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Let's keep conversations flowing

Whether you’re replacing ageing phone lines, modernising business telephony, or improving how customer calls are handled, we’ll help you find a clear way forward. Tell us how your organisation communicates today, what isn’t working, and what your users and customers need next.

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Voice Services | Nasstar