Wireless vs. wired home alarms in Australia (2025): Explaining reliability, NBN outages and 4G backup

With national figures showing around 578 burglaries for every 100,000 people, the issue of burglary remains a concern in Australia, emphasising the importance of effective home security measures. Vulnerabilities often stem from communication channels rather than the sensors themselves — for example, NBN outages or router failures can silence alarms, leaving homes exposed. This is particularly relevant in urban areas such as Melbourne, Sydney and Brisbane, where variable NBN performance is commonplace. In short, most Australian households don't need the 'smartest' gadgets — what they need is a well-chosen alarm kit with reliable dual-path communication (IP + 4G), properly placed cameras and a clear response procedure that takes NBN specifics into account. This provides a solid residential alarm system and is the key to practical protection.

Starting with your risk profile, not the hardware.

Before selecting equipment, assess your home's unique risks. Taking this practical approach will ensure that your system addresses real threats without unnecessary complexity.

Type of dwelling and layout

The layout of your home dictates your security needs, whether you own a freestanding house, townhouse or apartment in a bustling city like Sydney. Single-storey homes with side alleys or back gates, which are common in Melbourne suburbs, are prone to entry via windows or garages. Focus on probable entry points: front doors (45% of break-ins), windows (30%), and rear access points. For apartments, prioritise internal doors and balconies. Conducting a site survey, even a DIY one, helps you to identify blind spots such as narrow laneways.

What you're protecting against and what really helps.

Common risks include opportunistic burglaries, garage theft and package theft at the door. Data shows that break-ins can drop by up to 13% in areas with visible security measures. Effective deterrents include loud sirens, visible cameras and perimeter sensors. It is best to avoid over-relying on 'smart' features that complicate usage; simple, reliable alerts often suffice for low-risk urban homes.

insurance and evidence

Many insurers offer premium discounts of between 2% and 20% for installed alarms, though monitoring isn't always required. Video footage can provide crucial evidence and potentially speed up claims. Have realistic expectations: alarms deter, but they don't prevent all incidents. Professional monitoring adds verification, helping to prove events to insurers.

Wired vs. wireless systems in 2025

By 2025, both options will be viable, but the choice will depend on reliability, installation and long-term costs.

Reliability and maintenance

Wired systems are highly reliable and are not affected by battery failures or signal interference, making them ideal for larger properties. While wireless alarms are susceptible to rare jamming, this is often overstated. They use encrypted signals and regular pings for oversight. Batteries last 3–5 years and should be replaced proactively. In the real world: Wireless systems are suitable for most homes, with minimal interference in urban Australia.

Installation and everyday use

Retrofits favour wireless technology for ease of installation — there's no need to drill holes in walls, which is ideal for rental properties or older Brisbane homes. However, wired systems are ideal for renovations or large properties with metal frames, where cabling can ensure stable connections. For townhouses with shared walls, wireless systems help to avoid disputes.

Total cost over three to five years.

Upfront costs for wireless systems are $500–$1,000, while wired systems cost $800–$1,600. Add a further $600–2,000 for installation. Monitoring costs $20–40 per month. Over five years, factor in the cost of battery replacements ($50–100 for wireless vs. minimal for wired). Hidden costs: Data plans for 4G cost $10–20 per month, or you can opt for cloud storage for $5–15 per month.

Australian-specific connectivity: NBN Failures and Staying Online

The NBN's rollout has exposed vulnerabilities in single-path systems, but dual setups mitigate this risk.

Why do alarms go silent during router or ISP issues?

Single-IP systems rely on your NBN router, and outages — common during storms or maintenance — cut communication. Without power, NBN equipment fails, silencing alerts. This fragility has the greatest impact on monitored systems.

Dual-path basics

The dual-path system uses Ethernet/IP as the primary connection and 4G/LTE as the backup, switching automatically within seconds. Test signals (daily/weekly) confirm connectivity. It is the most resilient consumer option against ISP disruptions.

Dual-path vs. single-path: A Simple Diagram

Here is a basic schematic:

Home Hub — Ethernet/IP (primary) — NBN Router — App/Monitoring Centre

4G/LTE (backup) > mobile network > app/monitoring centre

This ensures a seamless failover process.

Selecting a SIM and reception

Test the 4G signal at the panel location and use multi-carrier SIMs to check coverage. In areas with poor coverage (e.g. hilly Sydney suburbs), add external antennas. Prepaid plans are sufficient for low-data alerts.

Cameras that actually help

For effective surveillance, strategic placement trumps quantity.

Placement and optics

Cover the entry zones: the front door, the garage/driveway and the rear access. Mount at a height of 2–2.5 metres to capture faces and number plates. Use wide-angle lenses in alleys to avoid glare from streetlights.

Night vision and bitrate.

Choose low-light over basic IR for colour detail. Use H.265 compression for efficient storage and calculate for 14–30 days. Moderate frame rates (15–20 fps) strike a balance between quality and storage space.

Privacy and alerts

Local NVRs enhance privacy compared to the cloud. You can tune notifications to avoid alert fatigue by excluding trees or roads from motion zones.

Using sensors and scenarios to reduce false alarms.

Making smart sensor choices minimises nuisances.

Perimeter vs. internal zones

Perimeter: Door and window contacts and vibration sensors for glass. Internal: PIR for motion. The pet-immune PIR ignores animals weighing under 20–30 kg when set up properly.

Pet-friendly PIR: working settings and installation height

Mount at a height of 2.2–2.4 metres and angle it down slightly.
Set the sensitivity to either low or medium.
Test with pets; adjust the pulse count so that it ignores small movements.
Use curtain PIRs for glass doors.

Modes that people actually use

Select 'Home' to arm the perimeter and 'Away' for full security. Garages should be zoned separately and entry delays of 30–60 seconds should be set to prevent self-triggers.

User training and access

Assign codes and share alerts with family members. Simple escalation: App notification → siren → call the authorities.

Monitoring: Professional or self-control?

Balance the cost with the response needs.

What professional centres do (and don't)

They verify alarms and call you/the police, but response times vary (10–30 minutes). There is no guarantee of on-site arrival; the focus is on escalation.

When self-monitoring suffices

For low-risk apartments, pair it with sirens and cameras. Receive alerts on your phone — ideal if risks are minimal.

hybrid approach

Set it to 'Self' and activate 'Pro' during the holidays for added peace of mind.

Budget levels with real configurations

Tailor it to your home.

$800–1,500 (entry-level/DIY)

Self-monitored hub with 2-3 PIRs, a door sensor and an indoor camera. Suitable for small units.

Typical house: $1,500–3,000

Hub with 4–6 sensors, siren and video doorbell/2–3 cameras with dual path. Optional monitoring available for three-bedroom homes.

£2,300–£4,600 (large block)

Mixed perimeter/internal and external sirens, four to six cameras with an NVR and professional monitoring. Ideal for corner lots with sheds.

Mini-table: Storage Calculator

cameras	Bitrate (Mbps)	days	Storage (TB):
2	2	14	~0.5
4	4	21	~1.5
6	6	30	~3.0

It assumes H.265; adjust for resolution.

Installation checklist for Australian homes

Check the 4G signal on the panel and add an antenna if necessary.
Schedule test signals and supervision windows.
Logically label zones in the app/centre.
I agree with the video retention period of at least 14–21 days.
Hold alarm drills with your family.

FAQ

Will the signal fail during internet outages? Not with dual-path: 4G automatically backs up.
How easy is it to jam a wireless system? Modern encryption technology makes jamming rare and difficult, but using a wired system avoids this issue entirely.
Are insurers required to monitor? No, but it could help to reduce your premiums, so check your policy.
How many cameras are needed for a three-bedroom house? Three to five: Front, rear and driveway, and internal if needed.
Can the video be stored locally without using the cloud? Yes, via an NVR for better privacy and to avoid fees.