PMRExpo
Migrating from MPT 1327 with TETRA in control
R
ohill, the Dutch trunked radio specialist, demonstrated an innovative base station interface (BSI) which enables operators
of MPT networks – and their subscribers – to migrate progressively and painlessly to TETRA. On Rohill’s exhibition stand to discuss it was a pioneer user – Michael Eberhardt, of Antec Funksysteme, who runs a commercial trunked network in Nuremberg, Germany. “What we have new in the Rohill system is
the TEP BSI interface”, he said. “With this base station interface system we can connect directly the transceiver of an MPT 1327 network. We are able to make a real soft migration from analogue MPT to TETRA.” “It’s a fully seamless integration”, echoed
Oliver Werning, Rohill’s business development director. “T e clients still use their numbering plan, they still use their terminals and can be reached through the TETRA radio and vice versa. So basically the user does not see, feel or smell anything. T ey can talk!”
Managing the users For a service provider such as Mr Eberhardt, migrating from analogue to digital generates two problems. “Everybody who has an analogue MPT network like me has a running system”, he explained. “So the fi rst problem is I don’t want to throw away the parts of the system, because they are working, and to buy a new transceiver, because I have transceivers.
“T e second problem is when you go to a
customer as a provider, you have to say, ‘OK, now we have TETRA and we are able to give you the TETRA infrastructure’. “So he says: ‘Why should I buy new radios?
T e old analogue MPT radios are still working; why should I buy new ones? You have to give them to me for a present and then I will take it!’ “But in this case, I don’t have to change the
radios of the customer. He can use his analogue radios and I only change the radios which are damaged – or when he buys a new one, I can sell him TETRA radios. And so he is able to communicate in the same fl eet, in the same group – TETRA, analogue MPT, whatever he likes.” In Antec’s Nuremberg installation, the whole
network is now controlled by a Rohill TETRA switch. T e TEP BSI unit interfaces this via a four-wire connection to the existing analogue base station, which is an MPT unit by Rohde & Schwarz. And the dual network has been running for months without problems.
Technology-independent “In our system, we have a soft switch architecture which means the switch is an application”, Oliver Werning added. “Once we have a soft switch architecture, it is technology-independent. It can switch MPT, it can switch DMR, and in theory APCO, LTE or whatever. T is is a unique solution we have here right now, and this is really unique also in the TETRA world.”
Rugged handportable for the fi refi ghter I
ntroduced at PMRExpo by Motorola Solutions was
a new TETRA radio for fi re services, the MTP830 S. This offers reliable access to essential controls, including an enlarged multi-function rotary button for regulating volume and changing talk groups. The simplifi ed keyboard is designed to be operated with gloved hands. In an emergency where a
user may be hurt or unable to move, an emergency call can be immediately made through the built-in ‘man down’ sensor. An integrated GPS receiver can also provide location information.
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Handportables for hazardous environments
N
ew TETRA handportables from the Funkwerk group were included
in a colourful display on the Funkwerk Security Communications stand. “There’s a standard voice terminal,
the ATEX-certifi cated terminal IIA T3, and the red one is a new one with a higher certifi cation class IIC T4, also dust-protected for hazardous environments”, said product manager Thorsten Flügge. “And here we have a special terminal which has an integrated personal security functionality. This terminal also will be available in ATEX from the middle of next year. It’s very interesting for lone workers and workers in hazardous environments – the chemical industry, all and gas industry – where accidents can happen. And then the persons are protected and can be easily located by our integrated localization functionality.”
Funkwerk’s FT4 EX radio: personnel tracking can be supported by its
internal GPS option or in indoor locations by installing radio beacons
The MPT830 S offers ETSI Class 3L
(1·8W) transmit power and increased receiver sensitivity for improved coverage in TMO and DMO operations. With its IP55 (Ingress Protection rating)
certifi cation, the rugged radio is engineered to resist heavy water streams and dust – a critical requirement for fi re fi ghters. “Mission critical teams need easy-to-
use devices in an emergency situation”, commented Jens Kristiansen, of Motorola Solutions. “Taking on board feedback from existing and potential customers, we have developed the new MTP830 S to provide users with an intuitive solution which enables them to concentrate on what matters most – protecting lives and property, while ensuring their own safety.”
Engineered for ruggedness and simplicity, a radio for fi refi ghters from Motorola Solutions
TE TRA TODAY Issue 2 February - April 2011
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