business radio day, had more to say at PMRExpo about its coming infrastructure and terminal products, which it expects to have ready for deployment around September this year. T ey will include high-performance base stations and repeaters, portables and mobiles, data modules, routers, networking equipment, applications and services. “DMR Tier III is the latest digi-
tal technology defi ned specifi cally for business-critical applications”, said Jürgen Hörauf, of Tait Eu- rope, who presented a conference paper at the conference on the advantages of Tier III technology. “A modern, scalable communica- tions system, which supports data and voice, DMR provides an ideal platform for digital business com- munications. Tait DMR solutions off er integrated location services, data services, over-the-air pro- gramming, network management, encryption and security features, with a stress-free migration path.”
Upgrade path Some details of Tait’s plans were given by Jamie Bishop, regional marketing manager. “It uses our TB8100 base station platform”, he explained. “By changing the exciter in there and keeping the PA and the power management unit, there
Digital radio systems for business-critical applications T
ait, which outlined its plans for DMR at the recent FCS
will be a migration from our exist- ing base station to DMR Tier III.” T is, he said, was the kind of
migration path the company’s major customers were looking for. “It’s changing one module in the base station and upgrading the node software. T e advantage is that all of the control and channel management is going to be within that exciter module. “It is quite clearly reducing the
amount of equipment they will have to have on-site and therefore reducing the amount of potential failures you can have in individual control cards or channel manage- ment cards, as well as giving you all of the standard benefi ts of hav- ing a TDMA digital system.” And all this was in addition to
the basic advantages of DMR, including the ability to retain the existing antenna and combining equipment at each radio site. “It’s quite a nice migration path,
especially because of the terminals, which are also migratable”, Mr Bishop added. “T e product that we release will be able to do MPT 1327, analogue and DMR Tier III; and that’s not a fi rmware up- grade but it will literally go into a software function. You can switch modes on the radio, and the radio can also scan between diff erent networks. “So if you wanted to migrate some of your radio network to
DMR and keep some MPT, for some reason... then it will be entirely possible to have a hybrid network.”
Interoperable DMR Tait also underlined the value of interoperability between products from diff erent manufacturers adhering to the DMR standard – especially for users such as public access operators, who have tended to mix infrastructure from one manufacturer with radios from others. Initially Tait will off er DMR
compatibility with Hytera products and later Simoco. “We will actually off er true interop- erability and true choice”, Mr Bishop emphasized. “With other technologies, you tend to get locked in to one manufacturer. Of course, we would like to sell a full system and everything to a single customer, but having that choice is important. What happens if the manufacturer no longer exists? Who owns the IP? And who can manufacture your terminals? “When you are look-
ing at a trunked radio system, you are looking at a ten-year capital investment, at least. And it’s not unusual for us now to be asked for guaranteed support for
DMR’s fi rst Atex radio M
aking its debut on the Hytera stand was an Atex
DMR handportable, claimed to be the fi rst of its kind. Hytera expects to gain the highest class Atex certifi cate for it. Its other features include a built-in GPS module, a high-resolution transfl ective colour LCD screen protected by a scratch-resistant lens which can withstand the impact of a 1kg hammer, and IP67 protection which can resist submersion in one metre of water for 30 minutes. Also shown was a new ETSI
LAND mobile January 2012
DMR Tier III trunking base station developed by Rohde & Schwarz’s PMR infrastructure division, which was bought by Hytera in August. “This is the fi rst released Tier III base station”, said Alexander Heinz, of the company. And he emphasized: “The important thing is that it’s according to the standard, the Tier III standard. So it has a control channel and in this case two transceivers giving three traffi c channels – three voice channels. It can be equipped with one or two base station controllers with redundant
equipment for maybe 15 years.” Tait’s Tier III products will be
backed from launch by AVL and dispatcher applications, which are currently being developed by partner companies. Prospective customers will be able to try out demonstration networks at its of- fi ces in Huntingdon and Vienna. “Today, radio communications
is fi rmly in the digital era, where one of the leading technologies is DMR”, said Hans van der Linde, Tait’s EMEA managing director. “Public safety and utilities organi- zations need reliable networks that can guarantee excellent coverage and effi cient data and voice com- munications. Tait is committed to helping our customers meet these challenges by providing the best technology combined with instal- lation and support from its team of industry experts.”
DMR – a full product family from Tait is in preparation and will be available in September
power supply.” Mobiles can communicate through the base station in either DMR or analogue mode. Rohde & Schwarz PMR also
produces digital infrastructure for Tetra networks. Its largest installation to date is a countrywide network in Malaysia, with 500 sites.
Hytera’s PD795 Ex DMR handportable, in the hand of Steven Hao. Behind him is a new DMR Tier III base station rack for trunked DMR systems
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