infrastructure Archives - Management Services and Solutions

‘Legacy’ Infrastructure Ongoing Maintenance

Continuing in Keeping Customers Operational

Over the last nine years, @YellowsBestLtd has sought out new, surplus and refurbished products and spare parts to assist with the aim of supporting Customers to maintain rather than replace their infrastructure networks, and as we enter our landmark tenth year, we continue to do so.

The alternative of wholesale replacements requires prohibitive investment costs and long project timescales to implement. And it can be the case that suggested replacements cannot provide equivalent operational lifetimes which therefore become obsolete faster than existing deployments.

Given the investment that has been made over many years, coupled with the fact may operational requirements have not changed, it makes sense to keep systems in place. By suppling spares, offering repair services and technical assistance, we are able to support these aims.

Systems Replacement and ‘Value Recovery’

Eventually, it does become necessary or desirable to undertake network refreshes. Often, we can help evaluate, source and implement suitable systems.

As discussed recently at the Engineering Design Show, we are able to utilise the capabilities of a network of local manufacturers to replicate and if necessary reverse-engineer components and products to meet exacting performance requirements.

When replacing existing networks, we are able to offer to Remove, Resell and/or Recycle existing equipment, generating revenue from the ‘Value Recovery’, and importantly ensure that items are disposed of in the most ethical and environmentally respectful way.

Equipment recently supplied and/or currently stocked

Certain product families continue to prove their excellent availability and reliability, and we are fortunate to continue to be able to provide stock of many of these items, either in new, surplus or refurbished condition.

Examples of such products follow; should there be anything specific you require, please do not hesitate to get in touch; we look forward to hearing from you!

Nokia ‘Dynanet’ PDH – Definitive Spares List

Keymile UMUX – Multiservice Access Solutions

Marconi XMP1 – telecommunications

Nokia, Marconi and Ericsson SDH – Synfonet, SMA and OMS

Sagem – ADR SDH family

RadiFlow – Cybersecurity Solutions for the Industrial IoT

TETRA – Equipment and Terminals for PMR Networks

Bosch – Professional CCTV Cameras

Hardware Repairs

Organisations that deploy, own and maintain infrastructure systems and networks make considerable investments in time and money, and it makes complete business sense to maximise the return on these investments. Even if it were desirable to make wholesale replacements, such projects take time to undertake. Ideally, if the equipment is performing satisfactorily and operational requirements have not changed, then is better to keep the existing equipment maintained for as long as possible.

Critical infrastructure systems are typically built to last, with high availability and reliable system components, and interchangeable spare parts. But sooner or later, repairs to elements are needed. During initial deployment and warranty periods, this is not normally an issue, but over time, these services become more specialised and difficult to obtain, as vendors advance their portfolios and discontinue older products.

@YellowsBestLtd specialises in ‘Keeping Customers Operational‘ by sourcing equipment spare parts and hardware repairs to modern and legacy systems. Should you have any requirements, please get in touch; we would be very pleased to hear from you, and look forward to being of assistance.

Take a look at some of the elements for which we provide hardware repairs services: Recent repairs requests

New parts for Legacy systems

Keeping Customers Operational

A continuing challenge for public and private network owners is the ongoing maintenance of infrastructure systems to support their business needs. In many cases, it makes sense to continue to operate legacy systems which are still fulfilling unchanged requirements, rather than contemplate costly and time-consuming change-outs and replacements.

@YellowsBestLtd seeks out new products and legacy equipment spares to assist with these aims. Recent enquiries have been fulfilled supplying refurbished and surplus stocks of equipment cards, as well as built-to-order cables and connectors to suit exact requirements.

There follows a few examples of items we have recently supplied. We would welcome any enquiries for the supply of similar or alternative parts, or support services to provide hardware repairs. Please get in touch; we look forward to hearing from you!

Example items, recently supplied

Connectors
Part Number	Product Code	Description
D-21470	Euro	Euro Connector 3×7

Cables
Part Number	Product Code	Description
102-722-1	Coax-SMB 1m	BT3002 Coax Cable BNC Plug to SMB Right Angle, 1m
102-722-3	Coax-SMB 3m	BT3002 Coax Cable BNC Plug to SMB Right Angle, 3m
102-722-5	Coax-SMB 5m	BT3002 Coax Cable BNC Plug to SMB Right Angle, 5m

Equipment
Part Number	Product Code	Description
T37882.02	NDUe	NDM DC Unit
TA 21513	DF 2-8	Term. Repeater 2-8 M, 1300nm LED MM/SM
TU 21236.10	VF E&M	CU 8ch E&M/uP: 1xUKe&m/VF
TU 21216	SUB/EXCH	Channel Unit SUB/EXCH

More equipment spares are listed here

Motherboard Repairs

Repairs to elements such as modules and cards of infrastructure hardware is one way we achieve our mission of “Keeping Customers Operational”. A good and recent example is Motherboards for display systems. These are from established, long-standing and therefore proven and fit-for-purpose systems. It therefore makes sense to maintain and extend the life of these parts.

Typical with such ‘legacy’ elements is that the level of complexity of the items is not excessive, meaning that repairs using discreet components is perfectly feasible, unlike more modern integrated systems which use specialised parts that cannot be freely or cheaply obtained or impossible to disassemble resulting in them being classed as ‘BER’ (Beyond Economic Repair). This is ultimately costly and disruptive, requiring wholesale replacements.

@Yellowsbestltd would be keen to hear from you should you have any repairs requirements. We would welcome receiving any defective items you have in order to perform a no-cost assessment to establish the feasibility and likely cost of restoration. Please get in touch to let us know how we can help.

Marconi XMP1 telecommunications

Traditional PDH / SDH transmission

The XMP1 product is multi-service access / transmission node equipment capable of PDH data rates of 8Kbps to 34Mbps and SDH STM-1 or STM-4. Originally manufactured by Marconi, the range was taken over in later years by Keymile and Bosch before being discontinued.

The system is still in service, customers include Utilities and Transport organisations, and typically deployed as a terminal multiplexer or as an ADM (Add-Drop-Mux). It can provide point to point or leased line in a corporate network for POTS, data, LAN, IDSN etc.

The building blocks of the system are the central unit which provides control and management, the SDH cards for STM-1 and STM-4 aggregation and the line units which provide uplink in the form of E1, E3 or SHDSL which can be copper or optical. 8 and 16 Slot versions were available as well as an SL (slimline) variant.

Spares and Repairs for continued long-term operation and maintenance

Whereas these products are no longer manufactured, @YellowsBestLtd is able to supply a limited amount of spare parts and/or offer repair services in order to aid customers in keeping their networks operational. There follows a non-exhaustive list of typical parts that can be supplied, we would be very pleased to receive specific requests for items that are needed.

A205HAT00080AAB	05HAT00080AAB	XMP (MK2) POWER SUPPLY 48/60V
AN00059057	62.7026.353.00-A001	PORT HDB3 (2)
AN00098224	62.7040.405.00-A001	MODUL V.11
AN00114784	62.7040.303.00-A001	ETHERNET ADAPTER
AN00118106	62.7006.430.00-A002	POWER SUPPLY 48-60V
A2AN00034165		Cable Clamp
A2AN00086011		CABLE CLAMP PANEL 1 HU
A2AN00086013		PATCH PANEL V.11
A2AN00102460		CCU-CENTRAL UNIT CC WITH QD2
A2AN00102463		SUBRACK XMP1 (16)
A2AN00109256		FRONTPANEL BLUE
A2AN00116240		Connecting Cable 2m
A2AN00214510		Connecting Cable Central Unit Protection
A2AN00214511		Ethernet Cable (5m)
A2AN0022815		DSK MODULAR
A2AN00274356		Input/Output Alarm Cable(2 O/P,3 I/P)
A2AN00276278		Connecting Cable 6m (Port HDB3) coax
A2AN00276281		Connecting Cable 20m (Port HDB2) coax
A2AN0034165		Cable Clamp
A2AN00702802		Mounting element
A205HAN00499AAC		XMP1-SL CROSS CONNECT

XMP1 spares

@YellowsBestLtd our mission is in “Keeping Customers Operational”. 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 for our customers.

Please help us understand your management services or solutions requirements, whether you’re implementing new systems or maintaining existing infrastructure networks to serve your operational business needs.

#business services new legacy solutions sourcing #enterprise infrastructure #sustainable spares #technologies products @YellowsBestLtd

Repairs

Maintenance of new and legacy systems

In order to accomplish our mission of “Keeping Customers Operational”, we often assist with the repair of parts for infrastructure systems, which are typically established, long-standing and therefore proven and fit-for-purpose. It makes sense to maintain and extend the life of these systems, as wholesale replacements will be costly and disruptive. This is particularly applicable when the service requirements have not changed, so functionality upgrades are not necessary.

Often, new product spares are expensive, difficult to source with long lead times, or no longer manufactured due to the product range having been discontinued and/or the original vendor having ceased business. In such circumstances, it becomes even more important to restore existing parts to working condition, tested and warrantied.

Available hardware services vary depending on the wide range of deployed technologies, and sometimes repairs are not possible due to component shortages or poor condition of the parts (e.g. suffering from water damage). But often both ‘legacy’ and newer items can be refurbished. Rebuild and recovery of software configurations can also be required and performed.

By example, there follows a list of a few recent requests we have been able to assist with. We look forward to hearing from you with any feedback you may have.

Recent repairs requests

Sagem ADR SDH family

‘Legacy’ telecoms history

The Sagem ADR product range was an SDH Add-drop Multiplexer (ADM) product family designed as a flexible platform for Metro Access and Metro Core, backhauling, microwave radio and Utilities infrastructure networks.

The family included ADR155c and ADR622, STM-1/STM-4 ADM, and ADR2500 ‘eXtra’ and ADR10000, STM-16/STM-64 multi-service NG SDH. This range was managed by the IONOS Network Management System (NMS) which also managed Sagem Primary Multiplexers, PDH and SDH microwave radio and DWDM systems.

The ADR family was deployed worldwide with more than 60,000 units over 5 years.

Comprehensive Functionality

The ADR platform offers a large variety of interfaces from E1 and E3, Fast Ethernet and Gigabit Ethernet, enabling the provision of a wide range of end Customer services. Transmission protection for guaranteed QoS is provided with SNCP, MSP, MS-SPRing as well as common unit and tributary protection.

The STM-16 network units can be used for multi STM-1 or STM-4 and local-cross connect functionality thanks to a fully non-blocking switch matrix.

The modular and flexible housing provided by the ADR155c (2U), ADR622 (6U) and ADR2500 ‘eXtra’ (14U) 19” and ETSI subracks provide a flexible mix of office, street cabinet and equipment room deployment.

Continuing to provide operational service

The ADR family of SDH products continues to provide operational service with various global Operator, Utilities and Transport companies.

@YellowsBestLtd supports requirements to maintain these networks by supplying various spare part items from refurbished and surplus stocks in perfect working order.

There follows a list of the main elements that are typically provided, though other items can be provided. Please let us know of any specific requirements you may have. We look forward to being of assistance.

SAGEM ADR Spares List

Part Code	Unit type	Description
AM101333 / 251 119 665	ADR155c	A155 BLK STM1/4 21E1 19″/ETSI CORE CHASSIS
AM101330 / 251 137 402	ADR 21E120	ADR BLK BNC 21E1/120 ITFE CARD
AM101328 / 251 137 366	ADR IC1.1	A155 BLK FC/PC IC1.1 OPTIC STM1 CARD
251 137 410	ADR LAN1	A155 BLK ADRLAN 10/100BT ETH ITFE CARD
AM101360 / 251 131 182	ADR FAN	FAN MODULE
AM101670 / 251 137 431	ADR ERE	A155 BLK BNC ELEC STM1 ITFE CARD

Repair Services

Maintenance Services for Systems Equipment

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.

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.

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. We look forward to hearing from you.

‘Dynanet’ Telecoms – ‘Rampdown’ notice

Phased Discontinuation of Production – 31^st May 2019 – 31^stJanuary 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:

31^stMay 2019 – DM8 Multiplexers, DF2-8 Optical Terminals, RPSA

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

31^st 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.

Keymile UMUX – Multiservice access solutions

Comprehensive Functionality

The UMUX platform provides carrier-grade reliable multi-service multiplexing and aggregation functions over copper and fibre networks. A variety of voice (POTS, FSX, FSO, ISDN) and data (e.g. G.703, V.11, V,24, V,35) interfaces, SHDSL and Ethernet (including PoE+ and EoS) services are available.

The modular and flexible housing provided by the UMUX 1500 (8U, 21-slot) and UMUX 1200 (4U, 8-slot) 19” subracks provide the perfect solution for all applications and locations, offering redundant controller and power supplies.

‘Legacy’ telecoms history

The UMUX SDH product portfolio was originally launched 1991 by Ascom, which subsequently became Keymile.

In 2003, by when 70,000 units had been deployed worldwide, the ‘enhanced’ UMUX multiservice access platform was introduced, offering the delivery of ATM, TDM and IP based services from the same platform, with support for IP/Ethernet, ADSL, VoDSL and G.SHDL.

Keymile was sold to ABB in 2017 when the UMUX range was discontinued, and then was acquired in 2019 by DZS.

Continuing to provide operational service

The UMUX, together with the UNEM network management system and ‘sister’ LINERUNNER and MILEGATE products, continues to provide operational service with various global Operator, Utilities and Transport companies.

@YellowsBestLtd supports requirements to maintain these networks by supplying various spare part items from refurbished and surplus stocks in perfect working order.

Part Code	Unit type	Description
A31A1679	U1500-CS	U1500 Core R2 (DC) for 19″ mounting (incl. Subrack, POSUM, COBUX 128x2Mb/s XC)
A30A0205	DATAS-FU	Data Interface unit. Multi-Interface V.35, V.24/V.28, X.24/V.11, RS485, Ethernet, 4 ports, all options
A24A3323	LOMIF-FU	2 Mb/s IF (E1), 8 x G.703 Interfaces
A24A3651	COBUX-FU	Control Unit Standard,128x2Mb/s XC
A21A2865	EXLAN342	POTS FxO Interface Unit, 12 ports, complex impedance
A31A7871	GECOD371	Data IF 64kb/s G.703 codir., 8 interfaces
A24A3338	LOMI4-FU	2 Mb/s IF (E1), 4 x G.703 Interfaces
A24A7979	POSUM306	Power supply unit -48VDC 85W
A30A1442	SUBH3-FU	POTS FxS Interface Unit, 30 ports
A31A7873	SULIS393	ISDN Interface Unit Subscriber side, ISDN BA 2B1Q, 8 interfaces
A23A9927	SYNAC-FU	SDH Access bridging unit SBUS-PBUS, 8xVC-12; no external IF
A24A1989	TUPON-FU	Optical Trunk Interface 8Mbit/s 1xopt.(o), 4xel.(e), 1550nm, PBUS access