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Customer
Melbourne Metropolitan Railways
Product
"Off-Line" Cell Extender® sites
Location
Melbourne, Victoria, Australia
Challenge
Maintaining coverage along the entire distance of the railway lines.
Solution
Most Cell Extender® applications use off-air radio links to connect back to a Donor site but RST have also developed an "off-line" version, where Cell Extender® connects to the Donor site via fixed 4-wire E&M circuits. This is especially important for Railways communications, where the same calls are to be extended over large longitudinal distances. The Melbourne Metropolitan Railway network is a star-based network of railway lines, that all extend from the City of Melbourne to a number of outer suburbs. Off-line Cell Extender®'s are placed at regular intervals along the railway, linked to the feeding site via fibre optic links or even land lines. Each Cell Extender® site mirrors the original Donor site, providing continuous MPT1327 coverage along the entire distance of the line.
A number of RST "off-line" Cell Extender® s are currently providing a highly reliable, 24/7 communications service to the Melbourne Metropolitan Railways radio network, and it is re-assuring for the Network operators to know that further extension is always readily possible with the well proven RST Cell Extender technology.
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RST - Radio Systems Technologies specialises in the design, manufacture and supply of leading edge systems and products for the Global Radio Communications Industry. We specialise in RF Coverage extension and Interoperability of all modern radio trunking standards and we have a range of unique, innovative and reliable products and systems, that are servicing Customers around the globe on a 24/7 basis.
Centrepoint Tower is one of Sydney's prime radio transmitting sites. Its roof top radio room is managed by Vertel Communications, who operate a very large MPT1327 Area Wide Network, which includes 8 Cell Extender sites (with a total of some 30 installed channels), designed and supplied by us.
The place: A radio site somewhere in Alberta, Canada. The local radio hut: Equipped with several RST systems, including a Cell Extender repeater system for the Town of Cochrane's MPT radio network, and an SB100 SmartBridge system to link a local Fire Department radio network to a SmartZone Emergency Services Dispatch centre.
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Customer
Vertel Telecoms, Australia (Large Nationwide MPT1327 Network Operator)
Background
Vertel is Australia’s largest MPT1327 Network operator, covering all States. A large number of Cell Extender® s form an integral part of the Network. Most Cell Extender® s are of the 1+2 type (1 Control Channel, 2 Traffic channels), but there also several 1+3 systems, where traffic demand is higher than the usual average.
Vertel choose Cell Extender® for a number of reasons. It provides economical solutions to specific coverage requirements, including coverage extension in areas where the available infrastructure has no further expansion capacity without major re-investments. Finally, as Cell Extender® is so easily installed, it is also used to provide fast track solutions to immediate expansion requirements.
A typical example is the Mt. View, NSW, Cell Extender® installation, briefly described below. This system was one of the first Vertel Cell Extenders, installed almost 10 years ago.
Product
Cell Extender®
Location
About 120 KM towards the North of Sydney, Australia, near Cessnock, a medium size country town, the Mt. View mountains rise some 200 meters above sea level.
Challenge
The population density in the area is low, but it carries a lot of business traffic passing through, on the way to or from the far more densely populated Sugarloaf and Mt. Arthur coverage areas. Add a highly undulating and mountainous terrain in between these two sites and you have the classic recipe for a coverage problem - mobiles "don’t know whether to lock onto one or the other site", and more often than not are “on the wrong site”.
Solution
Cell Extender® system, operating with 1 dedicated Control Channel, and 2 Traffic Channels, linked off the Sugarloaf site further South. To keep the coverage limited to those areas that required it, low cost, low power radio bases were used, which also helped to keep the total investment low. Installed nearly a decade ago, the Mt. View site has become a vital, high performance link in Vertel's radio network, carrying a large number of calls every day, around the clock.
Result
John Morehead, the Operations Manager of Vertel Telecom comments "Cell Extender® has given us an ideal tool to perfect our overall Network performance, effectively and reliably. It doesn’t need microwave links or land lines. The number of installed channels can be readily tailored to meet local area traffic demands. Even coverage into areas like underground car parks, or into large concrete structures, can be readily provided, by Cell Extender® , using only one single radio channel if necessary, if that’s all what the area needs. What’s more, a Cell Extender® system is, relatively speaking, quite mobile. It can be easily moved to new locations when the need for local coverage diminishes, or if and when a new Trunked Site has started to cover the area. All it needs is a simple re-programming procedure. Installation is equally simple, there are no complicated or critical adjustments, and it is a true "plug and play" system".
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Established in 1993, RST is a leading supplier in its field. Many RST systems have been successfully installed around the world - in countries like New Zealand, Spain, Korea, Cuba, the UK, Kazakhstan, South Africa, Belgium, China, the Philippines, Indonesia, Singapore, the North, South, and Central Americas, Malaysia, Canada, Poland, and, of course, Australia, providing a continuous, reliable around-the-clock service to users world wide.
Our products and systems provide continuous coverage solutions to Trunked Radio Network Operators, Mobile Radio Sales and Service Companies, and Large Radio Fleet Operators.
Learn more about the areas where RST are really making a difference.
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Customer
An oil pipeline operations company, Sudan
Product
Cell Extender®
Location
Continental subtropical or desert climate / environment
Challenge
MPT1372-TAIT Trunk Radio Network which is used for the company pipeline operation (1600 Km length). The current coverage is a 30 Km radius around the 9 pipeline main sites. How to extend the coverage to cover the entire pipeline given that the demand on the extend coverage area is expected to be very low and the minimum distance between 2 sites is 80Km and the maximum distance is 250 Km?
Solution
Cell Extender® MPT1327 repeater system, configured for Single Channel Self Assign operation where the channel reverts to Traffic if there is traffic demand in its coverage area. The advantages: low cost, no multi channel combiners etc. (Of course, if the system has reverted to Traffic there is no MPT Service at that time but MPT Service will be straight back as soon as the Call has been cleared down by the User). Cell Extender® links to a Parent (Donor) site either via a full duplex, usually low Tx power, fixed radio RF link (we usually use 2 mobiles for that function), or via 4-wire E&M lines. When we use radio, the RF link is frequency agile so we need 1 radio only, even if the Donor site is 5 or 6 (or more channels). We "tune" the RF link radio to the Donor site Control Channel and if there is a Call, we switch the RF link radio to the appropriate Traffic channel at the Donor site. When we connect via fixed lines, we normally extend all Donor site channels to the Extender site, and Cell Extender® is then fitted with a switch to do the switching function normally done by the RF link radio.
Result
This system has yet to be installed. Upon completion more results will be posted.
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