Professional intruder alarm monitoring and keyholder signalling
Professional monitoring is different from receiving an app notification. A suitable alarm sends agreed events through a monitored signalling route so keyholders can be contacted under the confirmed response plan.

A clear annual service scope
- ✓ Professional alarm monitoring
- ✓ Alarm signalling
- ✓ Keyholder contact
- ✓ System supervision where supported
- ✓ Visual or image verification where available
- ✓ Agreed escalation procedures
- ✓ Monitoring setup and testing
- ✓ Annual renewal
New installations, traditional systems and suitable takeovers
NOX supports new Ajax and professional systems alongside suitable traditional wired, wireless, hybrid, analogue and networked equipment.
- ✓ Homes
- ✓ Landlords
- ✓ Retail and offices
- ✓ Warehouses
- ✓ Industrial sites
- ✓ Commercial portfolios
From system review to annual renewal
Compatibility check
We confirm the alarm, signalling route, keyholders and the monitoring requirement.
Setup
The monitoring account and agreed contacts are configured and checked.
Testing
Signals and agreed procedures are tested before the service is treated as active.
Ongoing review
Keyholder and contact details should be kept current and can be reviewed at service or renewal.
Keep systems healthy and support easier to manage
Keyholder contact
When the agreed alarm event is received, the monitoring process follows the confirmed keyholder and escalation instructions.
Verification where available
Compatible systems may support image or visual information that assists with alarm handling.
Clear service boundaries
The written setup confirms the alarm handling, keyholder contacts and agreed escalation procedure without making unsupported response guarantees.
What affects the service or maintenance cost
The cost reflects the system, site and visit requirements confirmed before work is agreed.
- ✓ Alarm panel and signalling compatibility
- ✓ Residential or commercial property
- ✓ Required signalling path
- ✓ Keyholder and contact requirements
- ✓ Initial takeover or communication equipment
- ✓ Maintenance requirements
- ✓ Number of sites
Installed by NOX. Supported by NOX.
Installation is the start of the system lifecycle. Monitoring, maintenance, fault support and future changes can remain connected to the original design.
Monitoring
Professional oversight and agreed escalation when the property is unattended.
Maintenance
Planned inspections, testing, cleaning and system-health checks.
Priority Support
A straightforward contact route for faults, changes and future upgrades.
One Provider
Fire, CCTV, intruder and emergency-lighting support coordinated through one local point of contact.
Complete the system
Choose the next service that strengthens the same system, site or maintenance plan.
Alarm Maintenance
Keep the monitored system tested, healthy and supported.
View serviceIntruder Alarm Installation
Plan a suitable new alarm around the property and response required.
View serviceSystem Takeovers
Assess access, faults and supportability before bringing an existing alarm into monitoring.
View serviceOngoing Support Packages
Combine monitoring, planned servicing and selected maintenance under one arrangement.
View serviceRelated maintenance, monitoring and compliance services
Find the most relevant NOX installation, servicing and takeover options across our core service area.
Understand the service, takeover and renewal options
Useful questions and detailed answers linked to the system or ongoing support being considered.
Professional intruder alarm monitoring and keyholder signalling across the NOX service area
Use the most relevant local page for area-specific services, nearby coverage and genuine NOX project experience.
What to include with your enquiry
These details help NOX route the enquiry correctly and reduce unnecessary back-and-forth before a survey, service visit or quotation.
Premises and postcode
Include the building use, location, access restrictions and whether the site is occupied while work is planned.
Existing system details
Share panel, recorder or equipment photographs, approximate device quantities, known faults and available records.
Required outcome
Explain what the Intruder alarm monitoring needs to achieve, any insurer or compliance requirement and the preferred project timescale.
Feedback about local servicing and support
“Brilliant service from NOX. Super professional, knowledgeable, and they went out of their way to be helpful. Everything was explained clearly and in detail. The install was tidy, and the whole process was smooth from start to finish. We were thinking about getting a security system for a while and now we're so glad we went with NOX. Would 100% recommend to anyone.”Ryan HargreavesAjax Alarm System
“Seamless journey from start to finish! I filled in the simple form and was soon contacted by the team. They were very knowledgeable, professional and really listened to my needs. I have since had a system installed. The price was much less than I had expected and so far the aftercare has been great. I can't recommend them enough!”Jeremy BuntingSecurity System Installation
“We recently had NOX install cameras, smoke screens, and alarms at our office and the whole experience has been spot on from start to finish. From the very first phone call with Isaac, everything felt straightforward and reassuring. He took the time to explain our options, answered all our questions, and helped design a system that made sense for our building and our budget. No pushy sales tactics at all, which was refreshing. The installation was smooth, the team were professional, and even after everything was fitted, Isaac has been on hand to help with any follow-up questions. A really great service and a company I'd happily recommend.”Nathan De La RosaCommercial CCTV, Alarms & Smoke Screens
Clear answers before you commit
What happens when an alarm signal is received?
The agreed monitoring process covers professional alarm handling, keyholder contact and the confirmed escalation procedure.
Can an existing alarm be monitored?
Possibly. The system and signalling route must first be checked for compatibility and condition.
Is maintenance included?
Maintenance is separate unless the confirmed package specifically includes it.
Request a Monitoring Quote
Tell us what system is installed, whether it is new or existing and what service history or known faults are available. We will confirm the correct inspection or quotation next step.
