Good devices will keep sending the SOS or message until it knows it’s been received. It has more orbiting satellites and forwarding technology, so if the satellite that receives your message can’t see the earth station, it will forward it to one that can. The Iridium network is the only one you should rely on for a robust commercial health and safety solution. If they fail to check in, you or the monitoring station receives a “failed check in”, which can then be escalated. If you want to put more controls in place for staff outside cell cover, you can also use check-in schedules that require the staff member to push a button to check in at predefined times. Most of the good solutions allow you to set up pre-set messages to make it easier. If you are simply looking for communication outside cell cover, a two-way messaging satellite handset will do the job. Are settings configurable and how are updates received? (You want to be able to change tilt angles, delays etc over the air) Pure satellite solutions What is the IP rating? (It should be 65 to 67)ĩ. Where is it manufactured and what are the warranty terms and support?Ĩ. Will it still work when 2G is decommissioned?ħ. Has it been SAR certified as safe to wear?Ħ. What is the location accuracy? (Look for +/- 5m minimum)ĥ. What is the battery life of the device when set to one-minute polling? (Look for at least 15 hours)Ĥ. How often does it poll when in alarm? If you need to find your worker when they’re running or driving make sure it doesn’t just send a location when in alarm.ģ. What is the polling rate of the device?Ģ. If you are comfortable that your workers are always in cell cover and you’re looking at a cell-based duress device ask these questions:ġ. While the radiation from small bits of data for location updates is minimal, compared to mobile phones it’s still potentially harmful. Because you are asking staff to wear this device for hours at a time, they need to know it’s safe.Īsk to view the device’s SAR certificate which should state that the testing has been carried out in a NATA-approved test lab as the worker is going to have to wear the device for eight hours. Safe devicesĪ Specific Absorption Rate (SAR) certified device does not emit harmful levels of radiation. The scary thing about this scenario is the false sense of security this worker must have felt thinking someone was coming to his rescue immediately. Last year, Worksafe Australia prosecuted a distributor of a duress device for selling a device which wasn’t “fit for purpose”.Ī worker had been attacked inside a building and because he was inside his location wasn’t known. Many devices such as watches, ID badges or keyring styles only send their location when they go into alarm mode.Īnother issue such devices have is being safe to wear if they are constantly polling. This means if they activate an SOS inside a building it will still find them based on the breadcrumb trail and their last known position. If a person is always outside it doesn’t really matter, but if they’re in and out of buildings the lone worker protection network looks for a one-minute polling rate. This is one of the reasons a good cell-based duress device needs to be polling (sending location updates) regularly. The key thing to know about GPS is that it requires a view of the sky to accurately pinpoint a location so it’s no use if you’re inside a building (unless near a window). All lone workers need someone or something to watch over them – but not all duress devices are created equal.įirstly, let’s assume that all duress devices, regardless of the network they use, have GPS and send their location with every message.
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