Q Emergency Network // US915
An SOS that doesn't need the cell network.
An SOS that doesn't need the cell network.
An independent emergency communications path designed to remain operational during loss of conventional telecommunications infrastructure.
≈32-byteSOS packets902–928 MHzLoRa US915Weekson standby
SYS // Dual path
Two networks. One app.
Two networks. One app.
On a normal day, the QResponse app reaches QDispatch over Wi-Fi and cellular. When that infrastructure fails, the app switches paths: Bluetooth to the QLink on your keys, then LoRa at 900 MHz into the Q Emergency Network. The button on screen does not change. The radio path under it does.
The app detects the outage and reports what still works. One press hands the emergency packet to the beacon.
EXERCISE // Landfall sim
Take the towers down yourself.
Take the towers down yourself.
The mesh grows with the community. Every QLink is a node that carries its neighbors' traffic, so coverage compounds: sparse pockets at 5% household adoption, a backbone between major communities at 20%, island-wide redundancy at 50%. Pick an adoption level. Then take the towers down and route three SOS packets through what remains. Coverage is estimated from terrain modeling, not promised.
NETWORK STATUS—Estimated coverage · Q Emergency Network
Cell grid0/0 sitesQ Emergency Network0/0 gateways
Hypothetical scenario — for planning and concept purposes only.
SOS // Escalation path
How an SOS travels
How an SOS travels
Your QLink transmits to any hardened gateway in range. If no gateway answers, a relay carries the packet one authorized hop and tries again. If there is still no gateway, the relay hands the packet to a disaster gateway, which forwards it by satellite or to a local EOC. Every route ends at QDispatch.
- LoRa uplink · no gateway?
- Relay · one hop
- still none?
- Disaster Gateway · solar · battery · autonomous
- Satellite
- QDispatch
ESCALATION // controlled relaying · one authorized hop · not an unlimited mesh
HARDWARE // Key fob
The device
The device
QLink lives on your keys and does one job: get a distress signal off your person and onto the emergency network. It pairs with the QResponse app over Bluetooth, but it needs neither the app nor the phone to call for help.
Hold for SOS
Hold for SOS
The phone can be dead, smashed, or underwater. Hold the guarded button for about three seconds and QLink transmits an SOS with its last known or onboard position.
Position without a network
Position without a network
Satellite positioning does not need cellular service. Without assisted-GPS data a first fix can take longer, so QLink also caches the last position your phone supplied.
Pairs with the app you already have
Pairs with the app you already have
Day to day, QLink sits silent and paired. In an outage the app composes the emergency packet and hands it to the beacon over Bluetooth.
Sealed, IP-rated, weeks of standby
Sealed, IP-rated, weeks of standby
Sealed against rain and immersion. Sized for a keyring. Runs for weeks of standby between charges.
SPECTRUM // Part 15
Straight talk on spectrum
Straight talk on spectrum
QLink operates on LoRa in the 902–928 MHz band under the US915 regional profile. That is unlicensed spectrum, governed by FCC Part 15, and Part 15 devices have no protection from interference. Nobody selling equipment in this band can honestly promise you otherwise.
Decoded · what each chirp carrieschannel · SF · device · position · time · type · seq
listening to the band…
So we don't. We will never market QLink as guaranteed emergency communications, because no radio in unlicensed spectrum can guarantee anything. What we engineer instead is redundancy: multiple gateways in range, controlled relays where there are none, three independent backhauls behind every gateway, local dispatch when every backhaul fails, and store-and-forward so no SOS is ever discarded while a route might still appear.
FCC Part 15 · 902–928 MHz ISM · LoRaWAN US915 regional parameters · interference acceptance is a condition of operating in this band. Redundancy is our answer, not promises.
PILOT // Deploy
Bring the Q Emergency Network to your community
Bring the Q Emergency Network to your community
We are running pilot deployments with municipalities, EMS agencies, and hospital networks: gateway siting, ambulance kits, QLink distribution, and a local QDispatch edge.
Or write to us directly: xavier.soto@qlabsdigital.com