Will AusAlert work over Starlink or WiFi calling in a rural black spot?

Why the answer is no

AusAlert uses cell broadcast. Instead of sending a message to a list of phone numbers, the tower itself shouts at every compatible device inside its footprint. Nothing is addressed to you. There is no app, no subscription, and nothing to sign up for.

The official AusAlert guidance for remote and regional communities puts it plainly: the system works "through active 4G and 5G mobile networks", and "if you don't have mobile coverage in your area, or if a nearby cell tower is damaged, you may not receive an AusAlert."

That single sentence is the whole rural problem. A tower is the delivery mechanism. Your Starlink dish is not a tower and cannot pretend to be one. Neither is your router, your mesh, your WiFi calling, or the point-to-point link out to the shed. Those carry your traffic to the internet. A cell broadcast never enters the internet in the first place.

One honest note on sourcing. The AusAlert material does not mention Starlink or WiFi calling anywhere, so nobody official has said "this will not work over satellite internet". That conclusion follows from how cell broadcast works and from what the guidance does say about mobile coverage. We are drawing the line for you rather than quoting someone drawing it, and we would rather flag that than dress it up.

Why "emergency calls only" may still receive an alert

This surprises people, and it is the most useful thing in the official guidance. Because the alert is broadcast to an area rather than sent to a number, the usual reasons your phone cannot be reached do not apply.

The guidance states you may still receive an AusAlert if your phone cannot make calls or send texts, or if it shows emergency calls only, as long as it is within range of a tower. It adds that the tower can belong to a different provider than the one you are with. The compatibility page goes further: devices do not need a working SIM card at all. A prepaid phone with no data left can still get one.

In practice that means the old handset in the kitchen drawer is not useless. If your property sits at the very edge of a Telstra footprint with an Optus phone, or you have a dead prepaid SIM in a spare phone, those devices may still catch a warning that your primary phone catches too. It is not a second path, because it is the same tower, but it is a reason not to throw the spare out.

The landline path most coverage misses

Buried in the same official guidance is a line worth more to a black-spot property than anything else on the page: in areas affected by an emergency, automated voice messages may also be sent to landline phones. It is described as helping people without reliable mobile coverage.

So the landline you were thinking of dropping may be the only warning path at your address that does not depend on a tower you cannot see. That changes the maths on two decisions people are making right now.

The first is what happens during a blackout, which depends entirely on the technology behind the phone service. An old copper line drew its power from the exchange. Most modern replacements do not: the handset base, the modem or the radio unit runs on your power, and stops when your power stops. A cordless phone is the classic trap, because the base station dies instantly and the handsets are decorative from that moment on. Keep one corded phone that plugs straight into the socket.

The second is migration. Telstra is exiting its CAN Radio services, the radio-delivered phone technology used at remote addresses, including SCARS, DCARS, MCARS and HCRC systems, along with ADSL. Its official exit page says affected customers will be contacted, and warns that any third-party device relying on the old service, including medical alarms, security alarms, fire alarms, teletypewriters, fax and EFTPOS, needs to be sorted out directly with that device's provider. Nobody does that for you. If a medical alarm is on the line, that sentence is the whole story, and the replacement phone service needs to be confirmed with the alarm provider before the old one is disconnected. Our sister site Telco Help covers landline and phone migration in detail.

The blackout test, and the call you must never make

Never call 000 to test anything. Not your phone, not a new service, not a UPS, not a medical alarm. Every test call occupies an emergency call-taker who is needed by someone else. There is no "test mode" and no polite time to do it.

Test with ordinary calls instead. Pick a quiet weekday morning, tell the household what you are doing, and have someone available to call.

• Turn the mains off at the switchboard. Not the Starlink power point. The whole house, so you learn what your property really does.
• Start a timer. The number you want is how many minutes you have, not whether it works at all.
• Try an ordinary call from each phone people actually use, to a mobile or a friend. Then try receiving one.
• Check the landline, including the cordless handsets, and note which ones went dead.
• Load a website to confirm the dish and router are really up, not just showing lights.
• Wait for the UPS to die if you can spare the time, and write down the real runtime. Estimates are optimistic; batteries age.
• Check the medical alarm or security alarm if you have one, per its provider's instructions, never by triggering a real call-out.
• Write the result on the plan at the bottom of this page, with the date, and repeat it every six months.

Almost everyone who runs this test for the first time is surprised by something. Usually it is the cordless phone, or a UPS that lasted eleven minutes instead of the hour they assumed.

Your second warning path

Because you cannot control the tower, the whole rural strategy is redundancy. AusAlert's own guidance says it is only one way to stay safe and points regional communities to other channels. Build at least two paths that fail for different reasons.

• A battery AM/FM radio, with spare batteries, that you have actually tested. The ABC is the official national emergency broadcaster. This is the only item on the list that does not care about towers, power, internet or how old your phone is. Every rural property should own one, and most that do have flat batteries in it.
• Your state emergency service app and website. These run over your internet, so Starlink plus a UPS keeps them reachable. Install and test them before the season, not during it.
• The landline. Automated voice messages may be sent to landlines in affected areas, so keep one corded handset that works without power.
• Neighbours, by arrangement not by hope. Agree who rings whom, in what order, and what happens when someone does not answer. Write the names and numbers down; do not rely on a phone's contacts list you cannot unlock in a panic.
• A power and internet failure alert so somebody knows your connection dropped, which during a fire or flood is itself information. Alerted covers out-of-band alerting for exactly this.
• A community plan. Meeting points, who checks the far end of the road, which properties have people who cannot self-evacuate.

The test for any plan: if the mobile network in your district went down at 3am and stayed down, how would you find out there was a fire? If every answer routes through a tower, you do not have a second path yet.

Your one-page rural communications failure plan

Fill this in, print it, and put it on the fridge or in the meter box. It is deliberately paper, because the failure it plans for is the one where the screens do not work.

Print this plan