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Indoor mobile coverage

07.09.2017

Indoor mobile coverage

Today, communication is more and more based on wireless techniques. In Finland, people want to use mobile phones and internet everywhere, even in trains. However, there are some places which cannot be reached by radio frequency signals. In these cases, a so called DAS technique, Distributed Antenna System, comes to help.

Hospitals, parking garages, shopping centers, business centers, new apartment buildings – these are examples of places where indoor mobile coverage may often be weak. Reasons for the weak signal are many, one of them being a wall structure strengthened by metal, another could be energy efficient windows used for better thermal insulation.

Sufficient indoor mobile coverage is important not only to regular mobile phone users. It is crucial to the public authorities who use TETRA network that has to work both on the ground and underground. For example, Finland’s national public service broadcasting company (Yle) has a legal obligation to make sure that the authority releases can be distributed by radio and that they reach people even in the highway tunnels.

The solution is an indoor coverage network

Securing the proper flow of radio signals in places with challenging conditions is basically quite simple: you catch the desired frequencies from several base stations, transmit the signal to a repeater and then distribute it indoors via an antenna network. However, carrying out this in practice requires expensive special components and careful planning, as there are plenty of frequencies and the power needed is massive.

Frequencies must not interfere with each other and the returning signal to the base station must not block the base station. Mistakes in assemblies could cause serious damage, therefore only authorized companies are allowed to perform these installations.

Orbis Oy represents manufacturers that are specialized in the Distributed Antenna System technology. Orbis offers a complete range of components to indoor networks, including also customized, application specific assemblies manufactured in Orbis’s own production.

Browacom Oy, located in Haukipudas, Finland, is one of the leading companies in network design and installation. Their specialist, Tero Lepistö has led demanding RF design projects, one of them being the Highway 1 Tunnels between Turku – Helsinki.

Signal from multiple sources

Each telecom operator, as well as the authorities, have their own base stations in different directions. All buildings must have several donor antennas installed outside for catching signals in order to have proper indoor mobile coverage. Base station antennas are set up to a certain direction, for that the two-way signal quality would be as good as possible. Another way of bringing the signal in to the building is by cabling, which today usually means optic fiber cables.

The indoor antenna network is in many cases broadband, covering for example TETRA, 450MHz network and all telecom operators’ frequencies. Often, the network also covers WiFi.

The antennas are usually omni-directional and they look similar to the indoor fire alarms. In tunnels and corridors antennas are often so called radiating cables, that can be installed behind the ceiling so they are hidden from eyes.

Today, the network components on the market are more advanced and safe to use even in the hospitals, where use of mobile phones was forbidden in the past. A strong mobile network enables phones to operate with less power and thus they radiate less.

Unpleasant surprises

Some new buildings have suffered from poor indoor mobile coverage, which has caused astonishment and even worse, some reported near-miss situations. In a new nursing home an elderly resident had an attack of disease at night and called for help by using a wrist alarm device. However, the alarm never reached the nurses, as the mobile signal could not pass the wall structure. Luckily, at the same time one of the nurses was making a routine check on that floor and found the patient on time.

The new building methods for apartment buildings highlight energy saving, which leads to the usage of energy saving windows. These type of windows effectively block radio signals. Another challenging material, from the radio signal point of view, is aluminium based vapor barrier used for saunas and bathrooms. Nobody wants to give up the good thermal insulation, so the building designers are forced to consider the indoor mobile coverage solutions, too.

Also, the legislators set requirements for the mobile coverage and this obliges for example hospitals and shopping centers to make sure they follow up on the requirements. The good thing is that there are functional and cost-efficient solutions available.

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Text by: Pentti Niemi

Photos

Tero Lepistö at Browacom Oy has expertise in designing indoor mobile coverage solutions. Photographer: Pentti Niemi.

Tero Lepistö Browacom

 

In Turku-Helsinki highway tunnels the antenna is a tunnel long radiating cable. Photographer: Matti Rautanen.

Turun moottoritien tunnelin sisäpeittoverkko

 

Why 4.3-10 connector is better than 7/16?

23.08.2017

Building a mobile network with 4.3-10 connector

The mobile network base station and connector manufacturers have together designed a new smaller 4.3-10 connector to replace 7/16 connectors. New device models with this new connector have now arrived to the network installation scene. The new connector has better PIM value and it is suitable for applications which have space, weight or power limitations.

Orbis has a complete selection of network components with the new 4.3-10 connector as well as connectors themselves. All products have excellent PIM values and they are waterproof (IP65/67).


Technical details of 4.3-10

  • 4.3-10 connector for corrugated and radiating cables
  • Bandwith up to 12 GHz i
  • Power 500 W @ 2 GHz @ 90 °C
  • PIM -166 dBc @ 2x43 dBm (0,4...4 GHz)
  • IP68
  • 100 connection times
  • Operates without fastening

 

Applications

  • Antenna interface
  • Filter applications
  • Outdoor and indoor wireless communication solutions
  • Applications with challenges with limited space, weight or power

4.3-10 versus 7/16 

  • 60% lighter
  • Saves space 40%
  • Better PIM
  • Easy to install
  • Three connection mechanisms compatible with same female connector
  • IEC standad
  • Available from various manufacturers

Three connection mechanisms

Connetor is developed together with telecommunication device manufacturers and leading connector manufacturers

  • Fast to install (fastening by hands or quick-lock)
  • Three connection mechanisms compatible with same female connector


 

Orbis' component list

Request price list from our sales>>

Antennas  
   
3005122 Pear S5491i
  Omni-directional antenna, frequency 380-6000 MHz, connector 4.3-10(female), 50W, PIM-value -153 dBc @ 2 x 43 dBm
3004369 Pear S5606i
  Omni-directional antenna, frequency range 698-960 / 1695-2700MHz, connector 4.3-10(female), 25W, PIM-value -153 dBc @ 2 x 43 dBm
3005462 Pear M4936i
  Omni-directional MIMO antenna, frequency range 698-960 / 1710-2700 MHz, connector 4.3-10(female), 25W, PIM-value -153 dBc @ 2 x 43 dBm
   
Diplexers  
   
3003529 250W
  Diplexer, isolation 50dB, connector 4.3-10(female), 250W, frequency range 694-960 / 1710-2170 MHz, PIM-value -161 dBc @ 2 x 43 dBm
3005393 50W Tetra and mobile
  Diplexer, isolation 50dB, connector 4.3-10(female), 50W, frequency range 80-520/694-2700MHz, PIM-value -161dBc @ 2 x 43dBm
   
Hybrids  
   
3003530 80W 2x2
  Hybrid, 2 in x 2 out, connector 4.3-10, 80W, frequency range 694-2700MHz, PIM-value -161 dBc @ 2 x 43 dBm
3004426 200W 2x2
  Hybrid, 2 in x 2 out, connector 4.3-10 (female), 200W, frequency range 350-5850 MHz, PIM-value -161 dBc @ 2 x 43 dBm
3003531 250W 2x2
  Hybrid, 2 in x 2 out, connector 4.3-10, 250W, frequency range 694-2700MHz, PIM-value -161 dBc @ 2 x 43 dBm
85078458  400w 2x2
  Hybrid, 2 in x 2 out, connector 4.3-10, 400W, frequency range 694-2700MHz, PIM-value -161 dBc @ 2 x 43 dBm
3004425 150W 3x3
  Hybrid, 3 in x 3 out, connector 4.3-10, 150W, frequency range 698-2700MHz, PIM-value -161 dBc @ 2 x 43 dBm
3003532 150W 4x4
  Hybrid, 4 in x 4 out, connector 4.3-10, 150W, frequency range 694-2700 MHz, PIM-value -161 dBc @ 2 x 43 dBm
   
Tappers  
   
3004198 2:1, 500W
  Asymmetric power splitter (tapper) 2:1 3dB, connector 4.3-10(female), 500W, frequency range 350-5850 MHz, (there is no coupling 1550 to 1650 MHz). PIM-value -161 dBc @ 2 x 43 dBm
3004199 3:1, 500W
  Asymmetric power splitter (tapper) 3:1 4.8dB, connector 4.3-10(female), 500W, frequency range 350-5850 MHz, (there is no coupling 1550 to 1650 MHz). PIM-value -161 dBc @ 2 x 43 dBm
3004200 4:1, 500W
  Asymmetric power splitter (tapper) 4:1 6dB, connector 4.3-10(female), 500W, frequency range 350-5850 MHz, (there is no coupling 1550 to 1650 MHz). PIM-value -161 dBc @ 2 x 43 dBm
3004201 6:1, 500W
  Asymmetric power splitter (tapper) 6:1 8dB, connector 4.3-10(female), 500W, frequency range 350-5850 MHz, (there is no coupling 1550 to 1650 MHz). PIM-value -161 dBc @ 2 x 43 dBm
3004202 10:1, 500W
  Asymmetric power splitter (tapper) 10:1 10dB, connector 4.3-10(female), 500W, frequency range 350-5850 MHz, (there is no coupling 1550 to 1650 MHz). PIM-value -161 dBc @ 2 x 43 dBm
3004203 20:1, 500W
  Asymmetric power splitter (tapper) 20:1 13dB, connector 4.3-10(female), 500W, frequency range 350-5850 MHz, (there is no coupling 1550 to 1650 MHz). PIM-value -161 dBc @ 2 x 43 dBm
3004204 30:1, 500W
  Asymmetric power splitter (tapper) 20:1 13dB, connector 4.3-10(female), 500W, frequency range 350-5850 MHz, (there is no coupling 1550 to 1650 MHz). PIM-value -161 dBc @ 2 x 43 dBm
3004205 1000:1, 500W
  Asymmetric power splitter (tapper) 1000:1 30dB, connector 4.3-10(female), 500W, frequency range 350-5850 MHz, (there is no coupling 1550 to 1650 MHz). PIM-value -161 dBc @ 2 x 43 dBm
85075310 2:1, 300W
  Asymmetric Power splitter (tapper) 2:1, connector 4.3-10 jack (female), frequency range 350-2700 MHz (no coupling from 960 to 1710 MHz), PIM-value -161 dBc @ 2 x 43 dBm. It supports public safety and cellular bands, as well as WiFi 2.4 GHz.
85075311 3:1, 300W
  Asymmetric Power splitter (tapper) 3:1, connector 4.3-10(female), frequency range 350-2700 MHz, (no coupling from 960 to 1710 MHz), PIM-value -161 dBc @ 2 x 43 dBm
85075312 4:1, 300W
  Asymmetric Power splitter (tapper) 4:1, connector 4.3-10(female), frequency range 350-2700 MHz, (no coupling from 960 to 1710 MHz), PIM-value -161 dBc @ 2 x 43 dBm
85075315 10:1, 300W
  Asymmetric Power splitter (tapper) 10:1, connector 4.3-10(female), frequency range 350-2700 MHz, (no coupling 960 to 1710 MHz), PIM-value -161 dBc @ 2 x 43 dBm
85075316 30:1, 300W
  Asymmetric Power splitter (tapper) 30:1, connector 4.3-10(female), frequency range 350-2700 MHz, (no coupling from 960 to 1710 MHz), PIM-value -161 dBc @ 2 x 43 dBm
85075317 100:1, 300W
  Asymmetric Power splitter (tapper) 100:1, connector 4.3-10, frequency range 350-2700 MHz, (no coupling from 960 to 1710 MHz), PIM-value -161 dBc @ 2 x 43 dBm
3005271 2:1, 4.3-10, Basic
  Asymmetric Power splitter (tapper) 2:1/3.0dB 500W 350-2700MHz PIM -155 dBc/2x43 dBm
3005270 3:1, 4.3-10, Basic
  Asymmetric Power splitter (tapper) 3:1/4.8dB 500W 350-2700MHz PIM -155 dBc/2x43 dBm
3005269 4:1, 4.3-10, Basic
  Asymmetric Power splitter (tapper) 4:1/6.0dB 500W 350-2700MHz PIM -155 dBc/2x43 dBm
3005268 6:1, 4.3-10, Basic
  Asymmetric Power splitter (tapper) 6:1/8.0dB 500W 350-2700MHz PIM -155 dBc/2x43 dBm
3005267 10:1, 4.3-10, Basic
  Asymmetric Power splitter (tapper) 10:1/10dB 500W 350-2700MHz PIM -155 dBc/2x43 dBm
3005266 20:1, 4.3-10, Basic
  Asymmetric Power splitter (tapper) 20:1/13dB 500W 350-2700MHz PIM -155 dBc/2x43 dBm
   
Power splitters  
   
85075304 2way
  Symmetric 2-way reactive power splitter, connectors 4.3-10(female), 300W, frequency range 380-2700 MHz, PIM-value -161 dBc @ 2 x 43 dBm
85075306 3way
  Symmetric 3-way reactive power splitter, connector 4.3-10, 300W, frequency range 380-2700 MHz, PIM-value -161 dBc @ 2 x 43 dBm


85075307 4way
  Symmetric 4-way reactive power splitter, connector 4.3-10(female), 300W, frequency range 380-2700 MHz, PIM-value -161 dBc @ 2 x 43 dBm
3005279 4way, 4.3-10, Basic
  Symmetric power splitter 4way 300W 698-2700MHz PIM -155 dBc/2x43dBm
3005280 3way, 4.3-10, Basic
  Symmetric power splitter 3way 300W 698-2700MHz PIM -155 dBc/2x43dBm
3005281 2way, 4.3-10, Basic
  Symmetric power splitter 2way 300W 698-2700MHz PIM -155 dBc/2x43dBm
   
Terminations  
   
3004207 10W, 4.3-10F
  Termination 10W, connector 4.3-10(female), frequency 400-2700 MHz, PIM-value -161 dBc @ 2x 1900 MHz 5W tones at 25°C
3004211 100W, 4.3-10F
  Termination 100W, connector 4.3-10 (female), frequency 400-2700 MHz, PIM-value -161 dBc @ tested with 2x 1900 MHz 20W tones at 25°C
3005330 2W, 4.3-10M hex
  Termination 2W, connector 4.3-10(hex male), frequency DC-4000 MHz
3004208 10W, 4.3-10M
  Termination 10W, connector 4.3-10(male), frequency 400-2700 MHz, PIM-value -161 dBc @ 2x 1900 MHz 5W tones at 25°C
3004212 100W, 4.3-10M
  Termination 100W, connector 4.3-10(male), frequency 400-2700 MHz, PIM-value -161 dBc @ tested with 2x 1900 MHz 20W tones at 25°C
3005297 25W, 4.3-10M, Basic
  Termination 25W 698-2700MHz PIM -155 dBc/2x43dBm
3005298 50W, 4.3-10M, Basic
  Termination 50W 698-2700MHz PIM -155 dBc/2x43dBm
3005299 100W, 4.3-10M, Basic
  Termination 100W 698-2700MHz PIM -155 dBc/2x43dBm
3005300 200W, 4.3-10M, Basic
  Termination 200W 698-2700MHz PIM -155 dBc/2x43dBm
3005289 25W, 4.3-10F, Basic
  Termination 25W 698-2700MHz PIM -155 dBc/2x43dBm
3005290 50W, 4.3-10F, Basic
  Termination 50W 698-2700MHz PIM -155 dBc/2x43dBm
3005291 100W, 4.3-10F, Basic
  Termination 100W 698-2700MHz PIM -155 dBc/2x43dBm
3005292 200W, 4.3-10F, Basic
  Termination 200W 698-2700MHz PIM -155 dBc/2x43dBm
   
Adapters  
   
3004436 4.3-10 female - N male
  Orbis RF adapter 4.3-10 female - N male silver planting
3003555 4.3-10 female - 7/16 male
  Orbis RF Adapter 4.3-10(Female) - 7/16(Male), silver planting
3003556 4.3-10 male - 7/16 male
  Orbis RF Adapter 4.3-10(Male) - 7/16(Male), silver planting
3005030 4.3-10 male - N male
  Orbis RF Adapter 4.3-10(Male) - N(Male)
3003577 4.3-10 male - N female
  Orbis RF Adapter 4.3-10(Male) - N(Female), silver planting
3003578 4.3-10 female - N female
  Orbis RF Adapter 4.3-10(Female)- N(Female), silver planting
3003553 4.3-10 female - 7/16 female
  Orbis RF Adapter 4.3-10(Female) - 7/16(Female)
3003554 4.3-10 male - 7/16 female
  Orbis RF Adapter 4.3-10(Male) - 7/16(Female), silver planting
   
Connectors  
   
3005203 4.3-10 female 7/8"
  Orbis RF Connector 4.3-10(F) for cable 7/8, tightening with a tool
3004808 4.3-10 male 1/2" flex
  Orbis RF Connector 4.3-10(Male) for Flex 1/2 cable, tightening with a tool
3004809 4.3-10 male 7/8" flex
  Orbis RF Connector 4.3-10(Male) for cable Flex 7/8, tightening with a tool
3005624 4.3-10 Angle male 1/2, Flex 1/2
  Orbis 4.3-10 Right Angle Male for 1/2 Flex cable ,tightening with a tool

 

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Case Story: Järvenpää’s Social Service and Health Care Center

29.11.2016

It was worth to try the solution offered by Orbis

Järvenpää city with 40 000 inhabitants have decided to be a pioneer in the social service and health care reform in Finland: the new Social and Health Center combines at least ten separate units under one roof. The building has been recognized by its customer focused design. It also contains the latest technology in solution for Indoor Coverage. Orbion Consulting managed this solution, both design and construction.

Järvenpään SOTE-keskus

Almost finished Center will soon open doors for employees and almost thousand clients. Still open ceiling tiles reveal the huge number on cables and technology needed for the functionality and safety of the Social Service and Health Care Center.

Heikki Kankkunen from Orbion, the indoor coverage system designer and senior consultant. Broadband Indoor Radio Network installed by Relacom covert TETRA and also all other mobile operators in one physical network. “There is a coordination, so different devices do not interfere with each other” says Kankkunen. “Even the LED lamps can make interference on the radio frequency.”

Heikki Kankkunen Orbion Consulting Oy:stä on vastannut kuuluvuusverkosta

Conflicts within the requirements

Paneeliantenni Järvenpään SOTE-keskuksessa

Since 1987 Kankkunen has been working with RF technology and he probably knows better than anyone else about implementation of an indoor coverage network as well as the requirements behind the solution. “According to the architects plan, the big antennas should not be sticking up from the ceilings” – remembers Heikki.

"On the other hand, the broadband network requires them." Orbis provided an antenna pattern which was possible to install discreetly in the ceiling by the mounting structure, so that the emerging section of the antenna is not bigger than a surveillance camera. "The architect was reportedly very happy," smiles Kankkunen.

The other requirement was an absolutely reliable TETRA network in every corner – including corridors and cellars. The Center’s personnel will use TETRA as a daily tool. In addition, TETRA’s coverage is also required for the Emergency services. “No client is allowed to enter the building before the fire inspection is approved,” says Kankkunen, who has examined hundreds of measurement results. “The complete solution was tested and TETRA works perfectly in every place – also in elevators.”

On the opposite site of the coverage requirements there are regulations from authorities. Because Tukes (Finnish Safety Agency) defines maximum radiation of a system, challenges in coverage cannot be solved only by increasing the power. “Compared with the fixed cabling, the planning of a wireless data transmission is closer to probability theory,” – says Kankkunen. “The final result can be never perfectly predicted.”

The lead walls of the Health Center created also difficulties. Fortunately, Kankkunen has a wide experience with healthcare sites, so that surprises were avoided also this time.

The economic solution

Both the commercial mobile phone and the Public Authority network’s backbone in the building are base stations of three mobile operators (DNA, Elisa, TeliaSonera) and TETRA. The power from base stations is distributed by passive dividers to the antennas mounted in different floors and staircases. The parking hall in the basement is operated by a leaking cable.

“One multi-operator network which also covers TETRA, cut significantly the costs of installation and maintenance compared to separate networks,” tells Kankkunen about the benefits of the broadband system. “In addition, network that extends up to 2.6GHz frequency is designed to covert the future requirements without any modifications.”

Kankkunen has a clear opinion about the role of high quality components. “The RF network is just as bad as the worst component in it,” he says. “If just one part in the installed network does not work, it is not possible to come afterwards to fix it in a house which is otherwise fully in use.”

The consulting partner

Kankkunen has a wide experience and knowledge about design and implementation of indoor networks. The components for Järvenpää’s center he chose from the Orbis’s product portfolio, because he appreciates the wide assortment, quality products and a good knowledge of their use in practice. “Good products and a good customer service is the Orbis’s trump,” he says. “You can call them any time and the question will always be answered.”

Valuation continues to the other side of the table, so that Orbis sees itself to be more than just a supplier for companies such as Orbion Consulting. “Co-operation with Kankkunen is not so much a selling process, but we share product knowledge and technical support,” says Jukka Korhonen, Account manager from Orbis. “We want to stand out as a key partner, who openly tells about what you can make of the products and for what they are suitable – also where they are not.”

Paneeliantenni Järvenpään SOTE-keskuksessa

Everyone wins

One special feature of Järvenpää’s Center is that building was completed ahead of the schedule and under the budget. Korhonen from Orbis is proud of picking up the right components for the Indoor network solution. “From the application we receive valuable knowledge about the functioning of the components for designer, installer and for us,” he describes. “We provide the feedback also for our manufactures, so that everyone makes benefit.”

Also Heikki Kankkunen from Orbion Consulting is satisfied with a successful project. “During a year I had time to control model installation, inspections and measurements,” he remembers. “The result shows that this special solution from Orbis was a completely right decision.”

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Fiber optic to the living room in detached house

08.11.2016

In the area of Uusikaupunki city Vakaa-Suomen Puhelin, the local telecom company, is building a fiber optic network to residental areas. The thick black network trunk cable is brought as an undergroung cable or as an aerial cable to the outerwall of the house.

Vertek Oy is the subcontractor for the network installation. Vertek's installation manager Aki Salo says that the rest cabling route to the indoors is easier to install using a thinner and more flexible indoor cable, because the cabling path can be narrow and winding. Ivory colored and flame-resistant cable also looks better.

On the one end of the cable is an FTTH box in which at Orbis's factory connectors are assembled and they are installed to the adapters. The other end of the cable has a free 30-meter-long tail, which is spliced to the trunk cable in the outer wall. For the advantages of semi-assembled box is that there is no need to handle the optical fiber in the apartment. For example, pieces from cable's peeling can be dangerous for kids or pets, who keenly are wondering the installation process. "In addition, industrially manufactured quality is sure to be just as good, if not better, than scplicing made in the living room" - Salo says about installation conditions.

The product has been working perfectly, the end-customer and installer are satisfied with the result.

Orbis huoneistokotelo

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Case Story: The Tunnel of Tampere

05.10.2016

Tampereen Rantatunneli - Ulkona

The 2,4 km long Rantaväylä tunnel which is connecting east and west sides of Tampere city in Finland will be soon opened for traffic. From the beginning, the public opinion has grown in favor and against the major project. Contractors are constantly under the magnifying glass, so everything has to work properly from the outset - also the mobile network.

Empower Oy is a conglomerate company, which data network division is responsible for the implementation of indoor mobile coverage solution in Rantaväylä tunnel in Tampere. The solution allows three carrier networks with a booking for one future operator – also auto radio should be audible inside the tunnel. Field Manager Kimmo Eliander was assigned to the responsibility of the construction-site for two-and-a-half-months.

"In general, we build networks on masts and attics, but now we went underground," says Kimmo. "The tunnel had been excavated and the cable tray had been put in, but otherwise it was dark inside, wet floor and ground looked like a potato field."

Network first

The reason why the indoor coverage technique had to be installed early on is very simple: the controlling of a multi-contractor project could not work properly underground without mobile network coverage.

"Our partner provided us a scissor lift on large wheels”, -tells Eliander. “However it was not very steady on the uneven floor, it helped us to set up the cable.”

The 1-5/8” RF cable, which hangs on the ceiling of each lane, is the heart of the indoor network system of the tunnel. "Leaky RF cable which provides such a high capacity is quite chunky," - laughs Eliander, who has a piece of wrist thick cable in his office token as a memory. “Two kilometer cable reels were huge.”

Tampereen Rantatunneli - Tunnelissa

Deeper cooperation

Both the RF cable with supplies and the fiber optic network were built of Orbis’s components. "Our portfolio met this case unusually well," describes Orbis’s Account Manager Pasi Hopponen, who has long history of cooperation with Kimmo. "Not every component is valid for multi-operator network, but the customer did not have to shop around, because he got everything from us."

Over the years the customer relationship between Kimmo and Orbis’s Pasi has almost scrambled into a friendship, and issues are told straight out. "As it should be," - says Kimmo. "No need to be cap in hand like in the bank."

Tampereen Rantatunneli - Konehuone

Where the value comes in

Eliander thinks seriously about the reasons for deeper cooperation. “Orbis has a little bit better products and deliveries work properly” – he says. “In addition, products have been tested in cooperation with the client, listening to the suggestions from the field.”

The value provided by such a supplier as Orbis, includes time-saving details – for example, suitable equipment for installation. Pasi from Orbis says: “Customer knows a lot, but we bring in the fine-tuning.”

Orbis’s account in the Tampere tunnel project is not just about supply of materials. “We also rented measuring devices from Orbis for testing the ready-made network. The client requires measurement results for approving the project” – says Kimmo. “In this kind of a place, if something happens, the network connection must operate without fail.”

Once-in-a-life-time project?

The biggest Eliander’s work project before Rantaväylä tunnel in Tampere was the business center Ideapark. 

“In general, indoor coverage network is used in shopping centers, parking garages and in new energy-efficient houses,” –he says. “Tampere tunnel has been a different and challenging project for building this kind of a network.”

Kimmo does not think that there will be another project like Tampere tunnel, at least not in Tampere. “It is great if you can leave your own fingerprint on such a huge project” –says Kimmo. “The most important thing is that network is operating well and its users are satisfied.”

Tampereen Rantatunneli - Eliander

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