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Mobile Evolution and the Extinction Event

When Giants ruled … mobile communications

A long time ago, great “Dinosaur beasts” of Mobile Communications were supreme.  The beginnings were in the 1970’s with the launch of a Motorola handset weighing 2kg. This was followed by other barely portable products with huge batteries such as the Nokia Talkman. Only for the ‘new adopters’ who had to be in touch all the time.

Then came the ‘Bricks’ 

From these humble beginnings, soon a range of solid, reliable but ‘bricklike’ big and heavy phones appeared, like the Nokia 2110 and the Motorola Dynatac 8000X, as featured in the 1987 movie “Wall Street”. Designed for upwardly mobile business people.

Diverse expansion 

Then came a period of rapid expansion with a diverse range of more affordable products to suit wide consumer tastes. Various forms, colours and accessories became more and more important, with slide phones like the Nokia 8110 as featured in the 1999 film “The Matrix” and flip phones like the Motorola Razr, providing a ‘Star Trek’ appeal.

Feature explosion

An expansion of more and more features to make mobiles do more fuelled the explosion of product ranges. Cameras and music players were added to increase the functionality of these increasingly sophisticated and compact pocket-sized devices, such as the Nokia 6230.

6230
Nokia 6230

A glance at the 2004 Carphone Warehouse catalogue shows how varied mobiles had become, with the top 10 dominated by Nokia, Sony-Ericsson, Siemens and Motorola as the biggest manufacturers of the time.

2004 Carphone Warehouse “Top 10”

‘Tyrannosaurus’ functionality heavyweights 

For a while, the king of the land was the bulky, terrifyingly expensive but impressive (for its time) Nokia Communicator, offering phone, text, email and even fax. Opening up to reveal a full QWERTY keyboard, the range started with the 9000 which appeared in the 1997 film “The Saint” and had evolved by 2007 into the even more powerful E90.  

LegacySmartPhone
Nokia E90 Communicator

Extinction Event: The Death of the incumbents

But then came biggest shock to the world of mobile communications: the launch of the first Apple iPhone on 9th January 2007.

Like a meteorite striking the earth, this shock spelt the end for many mobile types which couldn’t compete with the sudden demand for ‘touch-screen’ devices using apps.

Indeed companies like Nokia, once the biggest of them all, couldn’t adapt and died a death, as well documented in the BBC documentary “The Rise and Fall of Nokia

Survival of the fittest

The ‘smartphones’ from Apple and later Android-based from the likes of Samsung became an increasing hit, wiping out much diversity and seeing a seismic shift away from many form factors to the now standard “slate” style of device.

Apple iPhone 4
Apple iPhone 4

Some ‘featurephones’ as they came to be known have lingered on, and in recent years companies like HMD global, who under licence have taken some iconic Nokia designs such as the 3310 and made a successful relaunch. Diversity is now finally creeping back with new variants such as the ‘folding’ Samsung Galaxy Z Fold2.

Your Paradigm shifts

Any memories or stories to tell? @YellowsBestLtd would be keen to hear your thoughts and experiences of sudden technology ‘paradigm shifts’. Let us know if we can be of any assistance with your future solution or services requirements. 

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Lessons from the ‘Lockdowns’ for Business

Seeking the ‘new normal’

Most workplaces have seen some considerable disruption over the last year due to the restrictions necessary to deal with the global Covid-19 virus pandemic. Hopefully things are going to get easier over the coming months. But before we race to ‘get back to normal’ (if that’s indeed possible), let’s consider some unexpected benefits we might want to hang onto.

Work is what you do, not where you do it

Commuting has always been a drag. The time wasted driving, not to mention the cost, in order to reach an office in which documents are written, emails are read and replied to, and phones calls are made. Or instead, various ‘productivity’ applications are used. All of which could be done from home. What is needed is a ‘mind-shift’ to recognise that “I’m off to work” can mean engaging in an activity rather than physically travelling somewhere. 

What’s the point of an office?

The broad acceptance that an office is where ‘work happens’ is due to the familiarly of their existence over a number of years. Once upon a time there were good reasons why work had to be so: people needed the facilities they provided, including main-frame computers, desk telephones, fax machines, printers, typing-pools (yes, really – people once didn’t type their own documents!) And memos – remember those ‘internal mail’ envelopes? But now, with laptops and mobile phones and broadband internet, it’s no longer critical to all share the same space.

People ‘like’ keeping in touch

The reality of the office is that it’s no longer a critically functional resource hub, but there are some social benefits over working remotely. It’s a place to meet and greet, share ideas and stories, help each other and generally contribute to high morale. People enjoy discussing last night’s TV or the football. Lasting bonds and relationships are formed, sometimes even being introduced to future partners. Not sure all employers would see this to be their ‘role’; the social side can of course be achieved in other ways. Anyway, flexible remote working offers the opportunity for better work-life balance.

Meanwhile, bosses like collecting their workers in one place as then it’s easier to ‘manage by walking about’. There’s a trust element: how can the staff be really hard at work if they’re not visible, aka ‘chained to the desk’. But following McGregors’s ‘Theory X (authoritarian) and Theory Y’ (participative) style of management, you either micromanage them because they’re not motivated, or trust people to take pride in their work and get the job done. So forcing people into an office isn’t the answer to productivity. Rather, pick the right people, train and support them, give them ownership of their tasks. Let them work where and when they need to. Use performance reviews as a tool (not a chore) to keep on track and set rewarding goals.   

Quantity or Quality

The crazy thing about the 9-5 office culture is people vary between not having enough time to get a job done, and piloting a desk ‘looking busy’, because they’re supposed to be ‘in’. Flexible working on the other hand recognises that people have lives with things that need scheduling from time to time, around varying business demands and commitments. Allowing people the discretion to manage their work-life balance means better motivated and focussed staff who will put the extra effort in when needed. Or else, managers need to take strong decisions on appropriate resources and team composition. Working ‘smarter not harder’ certainly doesn’t mean forcing everyone into an office and making them work all hours.

Meetings expand to fill the time available

It seems like ‘work’ to spend hours in meetings showing each other an endless supply of presentation slides. Discussions often arise involving only a few participants while others wait passively. The reality is very little is accomplished that couldn’t have been better reviewed remotely, in one-to-one conversations or communicated more broadly via team or company-wide bulletins.

Keep your germs to yourself!

Due to the emphasis on ‘attendance’ (perhaps ingrained in people from their school years), there’s often a culture of ‘bravely struggling in’ when ill with a cold, thus almost guaranteeing the sharing amongst all colleagues. Above all else, the pandemic has shown the sense in keeping people separated to reduce the spread of illness. 

Better for you, better for the environment

Not everyone can work from home, and certain tasks can’t be done remotely. But it’s time for a re-evaluation of what journeys are ‘necessary’ and what are the most productive work patterns, both in terms of getting the job done (without sitting in traffic jams for hours) and maintaining a flexible, motivated workforce. Not least because of the unsustainable effect on our planet’s finite resources and impact of climate change due to limitless business activities and excessive travel.

Are you ready for the ‘paradigm shift’?

@YellowsBestLtd we’d be interested to hear your thoughts and feelings about the changes brought about by Covid-19, and how you see habits changing for the future. Will you be rushing back to the office, or reaping new flexibility from remote working? Please get in touch, and let us know how we can help with your continuing business requirements. We look forward to hearing from you.

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New Year, New Stock! ‘Dynanet’ Spares

Nokia ‘Dynanet’ PDH Transmission products

For many years, the ‘Dynanet’ family of PDH Transmission telecoms products have well served Public Operator and Private Network Customers across the Telecoms, Utilities, Transport and Public Safety markets with high availability mission critical infrastructure, and indeed some networks are continuing to provide good operational service.

They were first introduced by Nokia over 20 years ago, and were continued in recent years by DNWP. Production of the majority of the product range was ceased in 2019. 

Spare parts for continued operational service

@YellowsBestLtd satisfies world-wide customer product sourcing requirements for current and ‘legacy’ equipment technologies from a wide range of Original Equipment Manufacturers (O.E.M.s).

For the ‘Dynanet’ range, we have recently obtained of a number of additional  refurbished and surplus equipment items. Hence, for those customers continuing to maintain their networks, there now exists the opportunity to increase stocks of spare parts to take advantage of the current availability.

Stocklist of items for immediate supply

Here is a list of the main items currently in stock, though there may be a few additional parts that can be supplied.  Hence, please check and if you do have any requirements, please let us know. We look forward to hearing from you.

Part NumberDescription
CC 24002DB2 2×2 Mb/s Branching Unit (B2), 75ohm
B2
DB2 B2 – CC 24002
Part NumberDescription
CC 24011DB2 2 Mb/s Switching Unit (X2), 75ohm
X2
DB2 X2 – CC 24011
Part NumberDescription
CC 24101DN2 2×2 Mb/s Interface Unit (IU2), 75ohm
IU2
DN2 IU2 – CC 24101
Part NumberDescription
CC 24111DN2 Control Unit (CU), 75 ohm
CG 24170DN2 Bus Power Unit (BPU)
CG 24171DN2 Extended Bus Power Unit (EBPU)
CU 24013Data Interface Unit (DIU) 2M, nx64k: G.703/704, 75ohm
nx64k
DIU nx64k – CU 24013
Part NumberDescription
D-21470Euro Connector, 3×7
3x7
Connector 3×7 – D-21470
Part NumberDescription
D-24204Optical Teleprotection Interface Unit, C37.94
C37.94
C37.94 – D-21470
Part NumberDescription
T31094.01DCN Adapter C4.0
DCNA
DCN Adapter C4.0 – T31094.01
Part NumberDescription
T37870.01NDM 19in 17-slot Subrack
Subrack
19in Subrack – T37870.01
Part NumberDescription
T37871.01NDM DN2 19in 17-Slot Subrack
T37882.02NDM DC Unit (NDUe)
NDUe
NDUe – T37882.02
Part NumberDescription
T37885.01NDM Ring Generator
Ring Generator – T37885.01
Part NumberDescription
T37885.02NDM Ring Generator + DC/DC converter
Ring Generator – T37885.02
Part NumberDescription
T37889.01NDM Backup Unit (NBU)
NDM Backup Unit – T37889.01
Part NumberDescription
T65580.01ACL2i PF GEN Line Terminal Card
ACL2i PF GEN – T65580
Part NumberDescription
TA 21513Optical Line Terminal Repeater (DF2-8), 1300 nm LED MM/SM
TA 21516Optical Line Terminal Repeater (DF2-8), 1300 nm LASER SM
TA 21518Optical Line Terminal Repeater (DF2-8), 1300 nm LASER LP
DF2-8 – TA 21518
Part NumberDescription
TC 21101DM2 Multiplexing Unit, 75ohm
DM2
DM2 – TC 21101
Part NumberDescription
TC 21301DM8 Multiplex Equipment, 75ohm
TC 21705Supervisory Substation
TC 21710.01TMS Adapter
TU 21122.5Data Interface Unit (DIU) 48..64k, V.11, 10ch
TU 21124Data Interface Unit (DIU) nx64k, V.11/V.35/X.21, 2ch
TU 21124.05Data Interface Unit (DIU) nx64k, V.11/V.35/X.21, sync
TU 21125Data Interface Unit (DIU) 48..64k with sync, X.21
DIU X.21 – TU 21125
Part NumberDescription
TU 21205Channel Unit SUB/SUB
TU 21206Channel Unit SUB/SUB
Channel Unit Subscriber / Subscriber – TU 21206
Part NumberDescription
TU 21215Channel Unit SUB/EXCH
TU 21216Channel Unit SUB/EXCH
Channel Unit Subscriber / Exchange – TU 21216
Part NumberDescription
TU 21234.20Channel Unit E&M/VF-P, 10 ch, 20 E&M ch
TU 21236.10Channel Unit 8ch E&M/uP: 1xUKe&m/VF
VF E&M
VF E&M – TU 21236.10
Part NumberDescription
TU 21255.01Channel Switch, 4 port
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Season’s Greetings

It has been an unexpectedly challenging year, unprecedented times indeed!

Unfortunately, it seems likely that we will face more difficulties ahead. The global pandemic still needs to be beaten, and the U.K. leaving the EU will result in unpredictable trading conditions.

Having just celebrated our fifth anniversary, YellowsBest looks forward to continue working with our partners and assisting Customers’ businesses through the uncertain times ahead.

We wish you all the best for a safe, seasonal celebration.

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Celebrating our fifth anniversary!

Five years of successful trading! Thanks to all our Customers and Suppliers.

@YellowsBestLtd has been in business for five years.

5 years of trading
5 years of trading

Our aim continues to be “Keeping Customers Operational”; understanding requirements and fulfilling them by providing a range of management services and solutions, including:

  • consultancy, for business development, sales and marketing
  • technical support, onsite engineering or 24/7 NOC remote assistance
  • systems supply, including legacy IT servers / workstations
  • spares for infrastructure, such as telecoms and CCTV cameras
  • repairs at module and component level, e.g. LED displayboards, PSUs
  • value recovery through reverse logistics, resale and recycling

As we continue to move forward, we’d very much like to understand what other services and solutions we can provide to our existing Customers, as well as what would be of interest to potential clients. We’re always keen to enhance our range of #business services, increase the #enterprise infrastructure we support and expand our mix of #sustainable solutions we offer for supply and maintenance of new and legacy #technologies and products.

Please get in touch to discuss your challenges; whether you’re implementing new systems or maintaining existing infrastructure to serve your operational business needs. We look forward to hearing from you.

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Repair Services – is it B.E.R.?

Equipment repair decisions – the Customer’s right!

Customers with critical infrastructure networks have elements that fail from time-to-time. These can usually be swapped out with items from a spare parts stock, to return the system to operational service with the minimum of disruption to overall system availability. 

The question then arises of whether the failed item can be repaired. In most circumstances, it is possible to restore parts to working condition, but sometimes they are classified as ‘Beyond Economic Repair’ (B.E.R.). This can be a somewhat contentious issue.

In theory, the term should be only applied to items where the repair cost would exceed the price of the purchase of a new or refurbished replacement. However, on the one hand the term can be used to label something that physically cannot be restored e.g. due to fire or water damage. On the other, it’s often applied to items where no repair facilities exist or it’s not possible to easily source the required components to complete the remedial work. So in other words, the term is used instead of the negative-sounding ‘repair not possible’.

The reason why this can become a source of frustration is because some customers rightly insist that they should be the “one who decides” if the item is ‘B.E.R.’. Maybe for reliability statistical reasons or version compatibility, it is sometimes desired to retain the original part even if repair costs are high. Sometimes, legacy replacement spare parts are in very short supply, and so it makes sense to retain and refurbish items rather than scraping and losing them forever. Even if the short-term associated costs are greater, for products that are no longer being manufactured, the available ‘spares pool’ is finite and diminishing over time and so the decision to repair may avoid longer-term supply issues in the future.

Reduce – Reuse – Recycle

Most customers have implemented their private network infrastructure systems over a number of years, and for many their operational requirements have not changed. Consequently, it makes more sense both financially and environmentally to maintain these systems rather than embark on complete change-outs.

@YellowsBestLtd helps Customers with their operational needs, and one aspect is to #Reduce the demand for avoidable whole-scale replacements through a combination of #Reuse of refurbished spares and repair of system elements. When removal and disposal of no-longer serviceable infrastructure parts is necessary, we can also assist with the resale and #Recycle for ‘value recovery’ of valuable materials.

We can assist by supplying critical and hard-to-find spare parts and hardware repair services, even when the systems have been declared ‘obsolete’ (i.e. no longer in production) by the O.E.M. And we will endeavour to ensure that repair options are always available and the question of B.E.R. is up to the Customer to decide. Please let us know how we can help; we look forward to hearing from you.


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Repair Services for Infrastructure hardware elements

Management Services for New and Old

From time-to-time, hardware elements within infrastructure systems fail, and repair services are required for a diverse range of parts procured over a considerable period of time, from a multitude of Original Equipment Manufacturers (O.E.M.s), some of which no longer exist.  

YellowsBest is able to provide a comprehensive repairs management service for both new and old equipment items, all to a standard equivalent to the original working condition and with warranted operation.

Component Level Repairs Example: SES Displayboards 

An example of the type of equipment that we are often asked to assist with is the MS1 Matrix LED ‘displayboards’ produced by SES and used for professional signage applications.

LED ‘displayboards’

Typical issues to deal with are Faulty LEDs, damaged capacitors and broken sockets, which have occurred in operational use over time. Adding to this are problems stemming from heat gun damage and resoldering caused by previous ‘user fixes’.  But these issues are addressable and the boards restored to full working condition. 

Other types of equipment for repair services include Telecommunications products, power supplies and CCTV cameras.

Repairs
Typical Items for Repair Services

Reduce – Reuse – Recycle

@YellowsBestLtd helps Customers with their operational needs, and one aspect is to #Reduce the demand for avoidable whole-scale replacements through a combination of #Reuse of refurbished spares and repair of system elements. When removal and disposal of no-longer serviceable infrastructure parts is necessary, we can also assist with the resale and #Recycle for ‘value recovery’ of valuable materials.

Most customers have implemented their private network infrastructure systems over a number of years, and for many their operational requirements have not changed. Consequently, it makes more sense both financially and environmentally to maintain these systems rather than embark on complete change-outs. We can assist by supplying critical and hard-to-find spare parts and hardware repair services, even when the systems have been declared ‘obsolete’ (i.e. no longer in production) by the O.E.M.

Hence, please check and if you do have any requirements, let us know! We look forward to hearing from you.

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Nokia ‘Dynanet’ PDH Telecoms Spares

Continued Supply of Spare Parts – Surplus and Refurbished Items

@YellowsBestLtd satisfies customer product sourcing requirements for current and ‘legacy’ equipment technologies.

Despite the recent ‘rampdown’ announcement by DNWP for the ‘Dynanet’ range, we should be able to continue to supply refurbished and surplus equipment for as long as required, but the likely effect of the discontinuation of production will be to squeeze the availability of remaining stocks, with a consequential impact on pricing.

Hence, it is recommended that if there is anything that might be needed, it would be best to consider purchasing it in good time to ensure availability of items and best prices.  

Here is a list of the main items immediately available from current stocks, though there may be a few additional parts that can be supplied. Hence, please check and if you do have any requirements, please let us know. We look forward to hearing from you.

Part NumberDescription
24204TPSO H/W Module
CC 24002DB2 Branching Unit, B2 2×2 Mb/s 75 ohm
CC 24011DB2 2 Mb/s Switching Unit, X2 75 ohm
CC 24101DN2 Interface Unit (IU2) 2×2 Mb/s 75 ohm
CC 24111DN2 Control Unit (CU) 75 ohm
CF 24186DN2 19″ Subrack
CF 24186.09DN2 Subrack 19″, grey-L91 EMC
CG 24170DN2 Bus Power Unit (BPU)
CG 24171Extended DN2 Bus Power Unit (EBPU)
CU 24013Data Interface Unit (DIU) 2M, nx64k: G.703/704, 75 ohm
T30506.0917-slot DYNANET Subrack
T30851.02Subrack Power Adapter (SPA)
T37870.01NDM ACM2 19in 17-slot subrack
T37871.01NDM DN2 19″ 17-Slot Subrack
T37882.01NDM DC Unit (NDUe)
T37882.02NDM DC Unit (NDUe)
T37885.01NDM Ring Generator
Ring Generator – T37885.01
Part NumberDescription
T37889.01NDM Backup Unit (NBU)
NDM Backup Unit – T37889.01
Part NumberDescription
T65520.01ACL2 RM DC Power Gen
T65580.01ACL2i PF GEN Line Terminal Card
ACL2i PF GEN – T65580
Part NumberDescription
TA 21513Optical Line Terminal Repeater 2-8 M, 1300 nm LED MM/SM
TA 21516Optical Line Terminal Repeater 2-8 M, 1300 nm LASER SM
TC 21101DM34 Mux Card
TC 21301DM8 Multiplex Equipment, 75 ohm
TC 21705Supervisory Substation
TC 21710.01TMS Adapter
TG 21261Ring Generator 25HZ 15W
TU 21122.5Data Interface Unit (DIU) 48..64k V.11 10ch
TU 21124Data Interface Unit (DIU) NX64k V.11/V.35/X.21 2CH
TU 21124.05Data Interface Unit (DIU)
TU 21125Data Interface Unit (DIU) 48..64k with sync, X.21
DIU X.21 – TU 21125
Part NumberDescription
TU 21205Channel Unit SUB/SUB
TU 21206Channel Unit SUB/SUB
Channel Unit Subscriber / Subscriber – TU 21206
Part NumberDescription
TU 21215Channel Unit SUB/EXCH
TU 21216Channel Unit SUB/EXCH
Channel Unit Subscriber / Exchange – TU 21216
Part NumberDescription
TU 21234.20Channel Unit E&M/VF-P, 10 CH, 20 E&M CH
TU 21236.10Channel Unit (CU) 8ch E&M/uP: 2xe&m/vf
TU 21255.01Channel Switch, 4 PORT
TV 21640.08Power Interface Adapter DC
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‘Dynanet’ Telecoms – ‘Rampdown’ notice

Phased Discontinuation of Production – 31st May 2019 – 31st January 2020

The production of the ‘Dynanet’ family of PDH Transmission telecoms products, first introduced by Nokia over 20 years ago, and continued in recent years by DNWP, is finally being ended.

This product range has well served Public Operator and Private Network Customers across the Telecoms, Utilities, Transport and Public Safety markets with high availability mission critical infrastructure, and indeed some networks are continuing to provide good operational service. 

Essentially almost all the old equipment items, with a very few exceptions such as the TPS64, are being completely discontinued in a phased way according to these milestones, which have already commended:

31st May 2019 – DM8 Multiplexers, DF2-8 Optical Terminals, RPSA

31st October 2019 – DM2 Multiplexers, Subs/Exch & VF Cards, DN2 IU2, Service Terminals, V.28/V.11 DIU

31st January 2020 – DB2, DN2 CU & BPU, G.703 & V.110, DIU, Ethernet I/F, Ring Gen, NDM 19” Subrack, NDA

@YellowsBestLtd satisfies customer product sourcing requirements for current and ‘legacy’ equipment technologies.

Should you wish to read the full ‘ramp-down’ notice and know more about obtaining equipment before it is no longer available, then please get in touch.

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Mobile Communications for Professional Users

Mission Critical Technologies

For many years, pioneering mobile communications technologies have been developed and implemented to serve the operational needs of professional users, such as public safety, utilities and transport organisations.

Initially based on radio technologies predating the public cellular networks and offering bespoke functionality, these were implemented as individual regional networks. Technology evolved from Analogue to Digital and deployments increased from regional to national rollouts.

We are now on the verge of next generation of mission critical communications with the arrival in the UK of the Emergency Services Network (ESN)

A brief history of PMR

When mobile communications were in their infancy, major organisations with mission critical requirements chose to build their own ‘dedicated’ networks to ensure availability of service. The users of such systems had operational requirements that shaped the technology developments, and gave rise to features such as Press-to-Talk (PTT), instant call set-up, encryption, user priority, 1-to-many and group calling. 

Initially such networks were analogue-based and collectively known as ‘Private Mobile Radio’ (PMR). Inter-operation between systems was rarely possible, though one standard that did evolve was MPT1327 ‘Trunking Radio’, implemented by a range of vendors such as NOKIA and TAIT. Individual organisations built, operated and maintained their own infrastructure.

The next generation of technologies were digitally-based; one of the most widely adopted standards was TETRA. A break-though was the standardisation of the ‘air-interface’ permitting the inter-operability of user mobile terminals with infrastructure from a range of manufacturers, such as NOKIA and Motorola.

In the UK, two nationwide networks were rolled out, AIRWAVE for public safety users and DOLPHIN for professional users. The latter of these hit financial difficulties and was closed. Other regional networks were deployed, such as that on the London Underground, whilst other organisations continued to maintain their analogue-PMR systems.  

ESN is coming

As on show at this year’s @TechXLR8 expo, the Emergency Services Network (ESN) is set to revolutionise professional mobile communications in the UK again, ultimately replacing the existing Airwave TETRA network and offering existing and updated services.  

Essentially, acting as an overlay onto EE’s 4G network, the software from Motorola solutions will deliver an advanced mobile communications experience, including the PTT, group-call, priority and security features demanded by professional users. 

The new service will bring PMR into the modern era with ruggedised mobile-phone-like user terminals providing advanced data capabilities, offering high quality colour-displays, GPS-mapping and location-based services. 

A huge investment in development and rollout is taking place, which will result in additional network capabilities and coverage provided by 500 new base-station sites. The new network will serve the needs of the Police, Fire, Ambulance services as well as other professional users such as local authorities and utility services.

Supporting existing and future requirements

@YellowsBestLtd satisfies new and ‘legacy’ requirements for the operations and maintenance of systems and networks by providing services including consultancy, technical support and hardware repairs, and solutions, with the supply of functional replacements, spare part items and software support.

We would be keen to hear from you regarding your existing or future operational needs; please get in touch.

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