Digital Voice Explained: The Landline That Plugs Into Your Router

For many small businesses, the simplest answer to the switch-off is Digital Voice - a phone line that works almost exactly like the one you've got, except it plugs into your router instead of the wall socket. Here's how it works, who it suits, and what to watch out for.

What Digital Voice is

Digital Voice is the term for a standard phone line delivered over the internet rather than the analogue copper network. Instead of plugging your handset into a phone socket on the wall, you plug it into your broadband router (or a small adapter that connects to it).

To the person using it, very little changes - same handset behaviour, same dial tone, same number. Under the hood, though, your voice is now travelling as data over your internet connection, the same basic principle as VoIP.

How it's different from a full hosted system

It's worth being clear, because the two get confused:

• Digital Voice is a straightforward single-line replacement - ideal when you just want your existing line to keep working.
• Hosted telephony is a full phone system - multiple users, DDI numbers, call routing, auto-attendant and analytics.

If you have one or two lines and simple needs, Digital Voice is the natural fit. If you have a team or take a lot of calls, a hosted system gives you far more - see analogue line replacement options to compare.

What you need to make it work

Digital Voice depends on two things the old copper line didn't:

• A working internet connection - ideally full fibre or SoGEA, with enough headroom for calls. See internet speed for VoIP.
• Mains power - because the router needs power, a phone on Digital Voice won't work in a power cut unless you've planned for it.

That second point matters more than people expect. We cover keeping your phone reachable during outages in landline resilience and failover.

Keeping your number and features

Two common worries, both easily answered:

• Your number comes with you - it's ported to the digital service. See keeping your landline number.
• Features like voicemail, caller display and call divert still work - often better than before. Our landline calling features guide explains what carries over.

Who Digital Voice suits

It's a great fit for:

• Sole traders and micro-businesses with a single line.
• Shops and offices that just need a reliable phone and their existing number.
• Back-office or secondary lines - though check devices that rely on phone lines for alarms and the like.

It's less suited to busy, multi-user environments, where a hosted system pays off.

The bottom line

Digital Voice is the easiest, most familiar way to replace a traditional landline - your phone simply plugs into the router and your number stays the same. Just plan for power and internet resilience, since the line no longer carries its own power. Want to know if it's right for you? Explore our Cloud Telephony service or request a callback.