Private Mobile Networks Supports Macro GSM for Connecting Between Networks

Private Mobile Networks, the UK provider of private GSM network technology, has announced support for GSM operator networks as an interconnect between distributed Private Mobile Network sites. Private Mobile Network traffic can now be distributed between locations over satellite or IP, or break out and pass over a national Macro GSM network.

"The use of PMN, whether from an office, in a vehicle, or as a rapid deployment unit, will usually require some form of backhaul of network traffic to a network operations centre or head office infrastructure," explained Chris Moore, sales director for Private Mobile Networks. "As far as PMN is concerned, as long as IP is supported, then the type of backhaul becomes almost irrelevant. Being able to connect over mobile, through the mobile interfaces at our UK data centres, extends the options available to our customers," adds Moore.

Network or bandwidth considerations will, typically, determine the services and functionality that will be delivered over backhaul, but the actual delivery of signalling will be exactly the same as over a standard wired Ethernet network.

The PMN Ethernet connectivity allows it to be connected through external communication devices such as satellite, microwave or wireless in remote locations, or a fixed IP Backhaul such as IP Broadband or a VPN where available. PMN delivers Private GSM. To extend the Private GSM network into a multi-site network or give it connectivity to the outside world requires an interconnect that provides a secure service.

Satellite is a global method of backhauling IP traffic and is the preferred method for many PMN deployments due to its flexibility, ease of setup and relative cost. Terminals can range from large-scale fixed installations to notebook-sized BGAN terminals with varying levels of frequencies and bandwidth available. The military, for instance, have dedicated frequency bands and satellites to route their secure traffic.

Private Mobile eXchange (PMX) is a mobile network switching subsystem, implemented in software, with all the components for switching mobile calls, switching short message service calls, storing and transmitting SMS and providing Packet Data (GPRS and EDGE) in software, complete with translation and routing tables to act as a replacement PBX and/or MSC. PMX is a GSM product - 2G and 2.5G (with packet data optional). The GSM voice calls and SMS are compatible with both 3G and 2G phones and terminals.

PMN solutions are deployed in the UK under the TeleWare low power GSM spectrum licence. Overseas, local low or high power spectrum licences are required.

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New Attenuators Family Green Line

SPINNER is presenting a newly developed series of symmetrical attenuators in the medium output range of 25W to 200W. At the heart of this new development is an aluminium nitride (AlN) ceramic material that is used as the medium substrate. This ceramic is environmentally friendly to manufacture, process and in waste disposal compared to other ceramics with similar properties.

Another highlight of this new development is the use of lots of identical parts. This guarantees quick availability over all power ratings and attenuation classes. The ceramics coated with the different attenuation values are installed into just one base body. The appropriate heat sinks are applied depending on power rating, although the 25W models do not require a heat sink. The available standard connectors are N male/female and 7-16 male/female.

A kanban system is used for assembly, which enables the quick and constant ability to supply even with fluctuating throughput. The attenuators are available in the power ratings 25W, 50W, 100W and 200W and are supplied with the attenuation values 3dB, 6dB, 10dB, 20dB, 30dB and 40dB. The whole mobile communication range has been covered thanks to the broadband development of 0 to 4.0GHz, optionally to 6.0GHz. This means the attenuators can be used universally in many high frequency systems. The slim and compact structure means it can be installed into the tightest of spaces.

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SPINNER introduces FLAT DESIGN UMTS Multiplexer

SPINNER China has introduced the latest innovation to its comprehensive product range of RF passive coverage solutions for indoor and outdoor use - a new generation of FLAT DESIGN UMTS multiplexers (BN 570535 - single unit and BN 570565 - double unit) that offers global wireless operators excellent results in combination with cost-effectiveness.

Designed to support multi-operator UMTS systems on a common antenna, the FLAT DESIGN multiplexer can be used by a multiple of operators who wish to use common sector antennas for tower/site sharing operations. It also allows operators to reuse existing feeder lines as well as antenna structures when adding new services such as LTE on the same frequency band. This in turn helps to significantly reduce overall network expenditure.

The FLAT DESIGN UMTS multiplexer is fully tuneable across the entire UMTS band with operational bandwidths of 10 to 20MHz and can there-fore be adapted to meet the specific requirements of the frequencies as-signed to the different operators. The standard model comes with high Q4 cavity filters and is capable of handling two operators with a frequency spacing of at least 5 MHz (depending on the operator bandwidth). On special request, the design can also be expanded to include more filters in cases of a reduction in the frequency guard band between the two operators. The FLAT DESIGN multiplexer is also designed to have the lowest possible intermodulation levels as intermodulation interference is a common problem with multi-bands and multi-operator systems. As standard, it also contains a switchable DC bypass for TMA/Antenna throughput control and functionality.

The multiplexer housing is made of seawater-proof aluminium which offers excellent corrosion resistance, even without painting. This also makes it relatively resistant to damage such as scratches, which may easily occur during installation. The multiplexer is one of the most compact products of its kind on the market and very lightweight at just 5kg (single unit) or 11kg (double unit). The unidirectional input and output ports further allow for simple on-site installation. It can be rack-mounted, tower-mounted or wall-mounted. The IP65 protection rating means that the multiplexer is protected against dust, water and other harsh environmental influences.

We are also in the process of developing a FLAT DESIGN concept for the entire SPINNER multiplexer product range in the near future and this will comprise all other mobile communication frequency bands including GSM900, GSM1800, and LTE.

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In-Building Projects in iBwave

The planning tool from the Canadian company iBwave has successfully established itself almost all over the world as the standard for planning in-building projects. Using iBwave, the network coverage in buildings can be calculated in a whole variety of ways and the capacities can be planned in advance. For realistic simulation, the iBwave product database provides direct access to products by all reputable manufacturers.

Products from the SPINNER communication portfolio are now also available there. All current SPINNER MNCS® products like filters, diplexers, triplexers and multiplexers can be used for in-house planning. In addition, there are also the components for coaxial distribution networks in buildings, such as splitters, tappers and couplers, as well as resistors, attenuators, jumpers and connectors.

The components can be directly downloaded from the iBwave online database or sent to you on request. This means it is now possible for network operators, planning offices, installation companies, integrators and system technology manufacturers to use high quality SPINNER RF products throughout from planning to system operation. We would be delighted to be able to support
you with the modelling of customised MNCS® systems for complex multi-operator sharing systems. Please send your enquiry to mc@spinnergroup.com.

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SPINNER Releases New MNCS® Flyer

The iPhone and comparable smartphones, as well as tablets and USB modems, have triggered a boom in the mobile communications market. The need for area wide network coverage and large bandwidths is still increasing constantly worldwide.Classic telephony and internet applications are being replaced by mobile devices. Use is at the same time increasingly shifting indoors. As a result, buildings such as hotels, shopping centres, stadiums and underground systems must be equipped with their own antenna systems.

For in-building coverage, SPINNER has been offering solutions in its usual high quality under the trademark MNCS® for a long time for the sharing of different networks, frequencies and bands. Complex multi-operator systems are our strength. Components for signal distribution in buildings complete our portfolio.

SPINNER has therefore produced an overview of its solutions for the in-building solutions growth market in the form of its own flyer just in time for MWC in Barcelona. The flyer is available as a PDF document on our website (www.spinnergroup.com) under the menu item 'Downloads'. We would also be happy to send you a printed version on request. We would be delighted to be able to present you with a customised proposed solution. For this please contact your customer advisor or send your enquiry to mc@spinner-group.com.

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High Quality Surge Protectors for Coaxial Systems

Since the dawn of time, thunder and lightning were thought to have been a sign of the Gods anger. The Greeks feared Zeus' lightning, the Romans experienced the wrath of Jupiter and with the old Teutons the God of Thunder, Thor, ruled.

Today, thunder and lightning can be explained as purely physical phenomena. As storm clouds gather, voltage increases within the clouds and between the clouds and earth. Once the potential difference finally reaches a limit of roughly 30,000 volts per centimetre there is a sudden discharge in the form of lightning and currents of 20,000 to 400,000 amps flow. In a split second the air is heated up to roughly 30,000° C. As a comparison the sun's surface temperature is only approx. 5,500 °C.

That is an enormous amount of energy with considerable potential to cause destruction. Damages not only result from a direct hit but also due to the potential differences of electrical systems or electromagnetic induction.

At the same time, the miniaturisation of electronic components results in increasingly greater sensitivity to surges. Even the tiniest impulse energies are enough today to cause irreversible damage. The costs of this kind of damage are not only toted up by the replacement of affected components but are also apparent in lost turnover during downtime and users' dissatisfaction. This is why lightning protection should also and particularly be paid special attention in modern telecommunication systems. For this, SPINNER offers its customers a high quality range of surge protectors for coaxial systems:

Gas discharge protectors for broadband applicationLambda/4 short circuit lines for RF outputs and low intermodulation valuesLambda/4 short circuit lines and gas discharge protectors combined (hybrid technology) for feeder lines with DC feed and AISG signals

Our surge protectors stand out in particular due:

Low VSWR and low insertion loss over the whole frequency rangeHigh protection effect by reduction of the residual voltage and energy to a value close to zeroHigh DC voltage and current ratingVery low passive intermodulationHigh RF-DC isolationSimple replacement of the gas discharge protector

Thanks to a new range of SPINNER surge protectors with a housing made of seawater resistant aluminium we can offer our customers a significantly lighter weight version with just as good electrical and mechanical features. Lower transport costs, easier installation or lower mast load are just a few of the advantages of our aluminium design. The electrical conductivity of aluminium, twice as high as brass, results in an even better surge current discharge.

Surge protectors from SPINNER significantly contribute to preventing downtime in telecommunication systems and to reducing maintenance and repair costs to the lowest level possible.

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Private Mobile Networks-Private GSM and IP Solutions

Private Mobile Networks (PMN) provide the ability to access voice services using mobile handsets over a private GSM network. With PMN, the mobile phone can be the handset of choice for financial and practical reasons by replicating a cellular network in software and inter-operating with IP/SIP devices and applications.

PMN can be deployed into areas where network integration and infrastructure costs would otherwise be prohibitive or into areas of high mobile usage with poor or no GSM network coverage, such as warehouses or in-building areas with signal disruption. The solution is ideal at temporary locations, such as in the construction and outdoor events industries. In areas where voice privacy is an issue, PMN can be implemented as localised islands of communication with the inherent security of GSM.

At the heart of the Private Mobile Network is the Private Mobile eXchange. PMX creates a self contained, privately owned and managed mobile network based on standard GSM protocols. The solution comprises both hardware and software components. The components are:

Base transceiver station (BTS) mobile phone access pointsBase station controller (BSC) to manage the BTSsPMX software run on industry standard servers

A Pico cell (BTS) connected to a local IP network delivers signal over low powered GSM. PMN can be deployed using a local server or as a hosted service delivering a Private Mobile Extension.

Increase in-building coverage using mobile handsets operating as PBX extensions also increases the ability to contact employees, reduces time to respond to customer and colleague queries, and provides a platform for quicker decision-making. A PMN also gives enterprises the ability to control and monitor and the potential to decrease mobile spend selectively.

PMN enables mobile phones to become part of the internal telephony infrastructure while near the workplace. Users are able to access the same services and features using a fixed extension on the corporate PBX or on their mobile phone. PMN can be implemented either by replacement of the PBX or by integration with the existing PBX infrastructure.

Use of applications on the mobile phone can be simplified using Mobile Office software which provides a menu-based interface to conferencing, call recording and call transfer and delivers this functionality to mobile handsets even when roaming.

Features and benefits:

Allows mobile phones to operate as PBX extensions while on-siteCorporate phone bills are reducedEase of use of devicesConsistent telephony user interface, irrespective of device, network or locationHigh level of customer service from improved staff contactBusiness continuity as the PMN continues to operate when the macro network is unavailableFixed Mobile Convergence with 2G and 2.5G handsetsPMX is built on industry standards, protecting investment with its ability to accommodate future developments

Many organisations benefit from a mobile, yet fully contactable, workforce and PMO has been designed to fulfil this requirement, providing in-building/on-campus communications.

PMO can extend or replace the current PBX infrastructure, providing an effective alternative to cumbersome Digital Enhanced Cordless Telecommunications (DECT) and Private Mobile Radio (PMR) installations used today.

Standard GSM mobile phones, including ruggedized handsets, connect users together on a secure, private network without incurring mobile phone call charges. Voice quality is high, as expected, on an industry standard-based GSM network, and support for PTT, SMS and GPRS is available.

Using one or more base stations PMO registered mobile handsets are able to communicate with each other in a localised GSM ‘island’. PMO provides cost effective utilisation of standard mobile phones and the improvement of in-building coverage.

To ensure network security only registered handsets can be connected. Pico cell base stations provide the interface between the handset and the private network. Callers roam anywhere within the coverage area with call control being seamlessly handled between base stations. The PMO can integrate alarm and notification systems.

Cost benefits

Our cost benefits include:

Zero call costs when in range and at landline rates when passed through local PBXAutomatic switchover when in range ensures cost controlCost-effective alternative to DECT, PMR or WiFi technologyControl of call and messaging costs between mobiles in the office

Productivity benefits

Our productivity benefits include:

Allows mobile phones to operate as PBX extensions while in rangeSupport for feature-rich PBX applications on the mobileBusiness-critical continuity maintained when the macro network is not availableLow powered spectrum extends mobile battery lifeEffective range of up to 900m radius (outdoor) with excellent voice qualityExternal analogue PSTN/SIP connectivity provides uplink / backhaul choice and flexibilityPrevents issues of network congestion and lossImmune to interference from WiFi or video senders

Compatability benefits

Our compatability benefits include:

One device, one number PBX applications – convergence without compromiseExtensive handset choice

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