Digital
M. Maruejouls. “It’s in low band, 68–88 MHz. T ere is a portion of spectrum in low band which under-used and which is interesting in terms of propagation. T e tendency is to go up to UHF because people want to have more bandwidth, they want to transmit video and things like that. But our customers are those who want to have voice and data, so our radios are not used to send a lot of data or video.”
Something different T ough e-DMR is clearly a capable system, how does Detracom answer the objection that it isn’t DMR? “In the digital world today, we have many diff erent technologies which are competing”, M. Maruejouls responds. “You have DMR with a number of players, you have dPMR with two players, so there’s already something diff erent. You have Apco 25 with a number of players. So why not e-DMR? “I read quite recently that e-DMR and some
other systems were creating confusion in the market – but it’s good to have several systems to off er to the customer. T ey have a broader choice. And so I believe it should be an advan- tage, not an inconvenience.” “Why not DMR?”, puts in Serge Huc, gen-
eral manager of the company. “Because DMR doesn’t provide as many services as e-DMR... Full duplex phone calls? DMR doesn’t do it.
Keypad remote A
novel accessory launched by Detracom at PMRExpo was a Bluetooth remote
speaker microphone developed for use with e-DMR mobiles in analogue or digital mode. When the driver has to leave the cab,
the device can provide up to 100 metres of communication range, depending on the surroundings. But Detracom also offers an amplifi er and vehicle-mounted Bluetooth antenna which can extend the range to 400–500 metres. “If you are a delivery organization, a
courier, where you have to go outside, you are still in touch and you can receive calls and you can also send status message, that it’s been delivered”, explains Jean-Claude Maruejouls.
Jean-Claude Maruejouls with Detracom’s new remote speaker-mic: via long-range Bluetooth, it extends PMR communications out to hundreds of metres from the vehicle
“When DMR was out, we had already 80
per cent of our system. We compared it and our customers said, ‘No, we would prefer your system’. We saw that there was a risk and we understood that to go it alone has risk. We took that risk – rightly or wrongly, but we believe
rightly. And we were supported in this by our customers, who are big customers.” M. Huc adds that Detracom is open to in-
terest from other manufacturers which might want to off er e-DMR technology. And one day he would like to put the specifi cation to ETSI.
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LAND mobile January 2012
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