Hosted VoIP — Built for Field Service

Business calls,
wherever your
team is.

VoIP Guardian is a VoIP phone system for trades and field-service businesses — fire & security, electrical, plumbing, heating and beyond. Your office number on every device, engineers' personal mobiles kept private, callers transferred straight to whoever's on site. No hardware needed. Calls included.

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EM8 HQ
VoIP Guardian
● Registered — Ext 1001
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12 Online
JAN
2027Analogue switch-off

Still on landlines? The network they run on is being switched off.

Openreach is retiring the UK's analogue phone network in January 2027. Every traditional landline has to move to a digital service — the only question is whether you switch in a planned way or a panicked one. VoIP Guardian moves your existing numbers over, keeps everything working through the port, and usually costs less than the line rental you're paying now.

Beat the Switch-Off →
Sound familiar?

Problems your team
faces every day.

We built VoIP Guardian because businesses with engineers on the road told us exactly what was frustrating them. If your company runs on vans, callouts and site visits, this will sound familiar.

🙈
Keep engineer numbers private
Once an engineer's personal mobile is out there, it's out there forever — jobs get arranged off the books and the after-hours calls never stop. Every call through VoIP Guardian shows your business number instead.
🔀
Transfer calls to your engineers
Stop taking messages the customer has to wait on. Transfer an incoming call directly to the engineer on site — just like a real office phone system, wherever your team happens to be.
🏢
Always show your office number
An engineer returning a call at 9pm from an 07… number looks like a bloke in a van, not a company. Every outbound call displays your main office or support number — professional, every time.
🌍
Office phones for remote workers
Staff working from home or on the move get full access to your business lines from the portal or the app — as if they were sitting at the office desk.
⏰
Time-Based Call Routing
Automatically route calls differently outside office hours. Send to voicemail, an out-of-hours message, or the on-call mobile — your rules, applied automatically every day.
👥
Ring Groups & IVR
Ring all engineers at once or in sequence. Build "Press 1 for Sales, Press 2 for Support" menus in minutes — professional call handling without expensive hardware.
📬
Voicemail to Email
Every missed call captured and emailed to the right person — with the audio file attached. Nothing slips through the net.
🎙️
Call Recording & AI Call Notes
"He said Tuesday." "She said it included the parts." Record calls and let our in-house AI transcribe and summarise them — what was agreed is on file, not in someone's memory.
🔁
Keep Your Existing Numbers
We port your current numbers over and manage the whole process with your old provider. Your customers notice nothing — except that calls get answered better.
📱
Softphone in Your Pocket
A full softphone inside the EM8 HQ iOS app — auto-configured on login, with proper push-notification ringing. Also works with any standard SIP softphone on iOS and Android.
🇬🇧
UK Numbers, Any Area Code
Buy local UK DDI numbers directly in the portal — Cardiff, Manchester, London, anywhere. Numbers go live within 48 hours, unlimited UK landline calls included.
☎️
Desk Phones, Auto-Provisioned
Prefer a handset on the desk? Plug a Yealink phone into the internet and it configures itself — no engineer visit, no manual setup.
Simple by design

Up and running in minutes.

1
Place Your Order
Tell us how many extensions you need and whether you're keeping your numbers. We set up your dedicated system the same day.
2
Add Your Team
Extensions are created and assigned to your people — caller IDs, voicemail and ring groups configured to how you work.
3
Numbers Sorted
New UK numbers in any area code live within 48 hours — or we port your existing numbers across and manage the whole process.
4
Start Calling
Your team logs into the app or plugs in a handset and everything's already configured — ready to make and take calls.
Why us

Built by people who've
carried the on-call phone.

VoIP Guardian wasn't designed in a telecoms boardroom. It came out of 12+ years working in the fire & security industry — being the engineer whose personal mobile every customer had, and the office that could never reach the van. We built the phone system we needed, proved it across the fire & security sector, and now run it for field-service businesses of all trades.

Simple pricing

Pay per extension.
Calls included.

No per-minute charges on UK landlines. No hidden fees. Just a flat monthly rate per extension.

Starter
£7/mo
per extension
  • 1 UK DDI number included
  • Pay As You Go
  • Voicemail to email
  • App calling (EM8 HQ or any SIP softphone)
  • IVR menus
  • Ring groups
  • Time routing
Order Now
Professional
£13.95/mo
per extension
  • UK DDI number included
  • Unlimited UK calls
  • Voicemail to email
  • App calling (EM8 HQ or any SIP softphone)
  • IVR menus
  • Ring groups
  • Time routing
Order Now
Pro + Handset
£19.95/mo
per extension
  • UK DDI number included
  • Unlimited UK calls
  • Voicemail to email
  • App calling (EM8 HQ or any SIP softphone)
  • IVR menus
  • Ring groups
  • Time routing
  • Yealink handset included, auto-provisioned
📞 Order Now
Works with everything

Built into your existing workflow.

Use VoIP Guardian on its own with handsets and any SIP softphone — or alongside the EM8 Portal and Guardian products for one login, one dashboard, one bill.

📱
Available on
EM8 HQ iOS App
🌐
Built into
EM8 Portal
📲
Compatible with
Any SIP Softphone
☎️
Plug & play
Yealink Desk Phones
FAQ

Switching to VoIP,
answered.

What happens to my landline in the 2027 switch-off?
Openreach is retiring the analogue network in January 2027. Traditional landlines stop working and every business must move to a digital (VoIP) service. VoIP Guardian ports your existing number across so your customers see no change.
Can I keep my existing phone number?
Yes. We handle the entire porting process with your current provider — you keep your numbers and stay reachable throughout the switch. Your existing service keeps working right up until port day.
Do I need special phones?
No. Use the softphone app on the phones your team already carries, plug-and-play Yealink desk phones that configure themselves, or a mix of both.
How quickly can we be up and running?
New extensions are typically live the same day you order, and new UK numbers within 48 hours. Number ports take longer — usually one to two weeks, set by the losing provider — and we manage the whole process for you.
Will engineers' personal mobile numbers stay private?
Yes — that's half the reason we built it. Engineers make and take calls through the app, and customers only ever see your business number.
Is it only for fire and security companies?
No. VoIP Guardian was born in the fire and security industry, but it's built for any business with people in the field — electrical, plumbing, heating, drainage, locksmiths and more.
Ready to switch?

Get your team on
VoIP Guardian today.

Order online in a couple of minutes — new extensions are usually live the same day. No contracts, no hardware needed, cancel anytime.

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