YellowsBest sources Enterprise solutions for customers’ Systems to maintain the operational status of infrastructure Technologies.Keeping Customers Operational

We supply new functional replacements and spare parts, and also assist with legacy equipment maintenance:


From time-to-time, hardware elements within infrastructure systems fail, and repair services are required. The diversity of modern networks and technologies in use by businesses means that there are a wide range of parts procured over a considerable period of time, from a multitude of vendors and international manufacturers from across the globe. This means that there is a spectrum of the relatively new to aging items, some parts being still under warranty to elements from Original Equipment Manufacturers (OEMs) that no longer exist.

YB is able to provide a comprehensive repairs management service, assisting business by acting as a single returns facility for both new and old equipment items. Typically, newer parts in or out of warranty will be sent to the OEM for repair or substitution. Older items, especially in the case where the OEM is no longer exists, will be repaired using out network of independent third-party repair centres, all to a standard equivalent to the original working condition and warranted operation.


Sometimes the repair of equipment elements is not possible, such as when the item is physically damaged or Beyond Economic Repair (BER). Or it can be the case that the repair times are long, and in order to safeguard continuous operations of systems, additional parts are needed to be kept by the field maintenance teams for substitution at site when failures occur.

YB can source the required equipment spare parts, though its partnership with key vendors of the latest products as well as suppliers of legacy systems components. In many cases these parts can be newly manufactured to order and delivered within specified lead-times, or quickly despatched from either unused surplus stocks or ‘2nd user’ items, particularly in the case when systems are deemed obsolete and are no longer produced by the OEM.

Functional Replacements

When systems have reached the end of their useful working life, repairs are challenging and spares are unattainable, companies may need to completely change out or upgrade their infrastructure equipment.

YB can assist businesses by seeking alternative product solutions, in the form of either complete replacement systems, or re-manufactured elements to provide the most efficient substitution of equivalent required functionality. Particularly in the case where operational requirements have not changed, it may prove commercially beneficial to replace like-for-like products. In many cases, the substitution of functionally equivalent newer elements may pay for themselves over time through efficiency savings due to lower power consumption, etc.

YB works with a diverse range of Customers having critical infrastructure deployment and maintenance requirements, and consequently supports a broad product portfolio of systems and ancillary items.

Markets & Technologies

The following lists provide examples of who and what we can support and supply, but please let us know what you need us to provide.

  • Sectors
    • Telecoms Operators
    • Public and Private Networks
    • Utilities (Electricity, Gas, Oil, Water)
    • Public Safety (Police, Fire, Ambulance)
    • Transport (Rail, Metros, Underground, Highways)
  • Equipment and Systems
    • Optical Fibre and Copper, Access & Transmission, PDH, SDH
    • TDMoIP, Pseudo-wire, IP Data and Voice Telephony
    • Carrier Ethernet, C / DWDM
    • Microwave Radio, wireless coverage solutions
    • Private Mobile Radio (PMR), TETRA infrastructure, terminals, accessories
    • CCTV Cameras, security systems
    • Power supplies and peripheral devices
    • IT network, workstation, server, storage products
    • Network Management Systems (NMS), OSS software
Vendors & Products

The following is a list of previous and current manufacturers, together with some examples of their products, which we should be able to source and supply items and spare parts; please contact us with any specific requirements and we will advise with the status of available stocks.

  • Vendors and Example Products
    • Alcatel / Lucent
      – e.g. 1511 Max
    • ADVA
      – e.g. WCM, CMDXM
    • Apple
      – e.g. PowerMac G5 / Pro
    • Benning
      – e.g. MCU1000
    • Bosch
      – e.g. DSK, MIC-500 Cameras
    • Brocade / Foundry
      – e.g. 10G
    • Ciena
      – e.g. SM-A, CM-A
    • Cisco
      – e.g. ISR 4300 series
    • ECI Telecom
      – e.g. OPBFC
    • Eltec
      – e.g. AL 175 NT
    • Ericsson
      – e.g. OMS 846, 860, 870, 1600
    • Ernitec
      – e.g. M2504 M/2
    • Extreme Networks
      – e.g. Summit
    • Keymile
      – e.g. UMUX, UNEM, XMP1
    • Huawei
      – e.g. M1000
    • IBM
      – e.g. PS/2 Model 80
    • Juniper
      – e.g. SRX5400, EX3300
    • Ganz
      – e.g. ZC-YX/NX270 Series Cameras
    • GEC / Marconi
      – e.g. SMA SDH
    • MRV
      – e.g. EM 316, 1600, 2003, 2004
    • Newbridge
      – e.g. MCP, CEB, TDS
    • Nokia Telecommunications
      – e.g. Dynanet PDH DM2 DB2 DN2
      – Synfonet SDH TSW0
      – NMS/10, NMS/100
      – DX220
    • Nokia Siemens Networks (NSN)
      – e.g. Surpass HIG1100, HIE9200, HIQ8000 
    • Nortel
      – e.g. OTR, OCLD
    • Pelco
      –  e.g. Spectra IP Dome System Cameras
    • RAD
      – e.g. Megaplex, ETX, ASMi, RADview
    • Tellabs
      – e.g. DM8, MX8
    • Thomson
      – e.g. Speed Touch
    • Transmode
      – e.g. MDU, OCU
    • 3COM
      – e.g. Baystack
    • 360Vision
      – e.g. ‘Predator’ Cameras

Note also we would like to hear from you if you have ‘legacy equipment’ that you are removing from service, as we may be able to help with its disposal and achieve value recovery.

Additionally, if you’re a Vendor, contact us to discuss how we may be of assistance for:

Value Added Resale

Vendors and international manufacturers, even those with an existing presence in the UK, often benefit from increased sales effort and routes to market provided by distributors and indirect sales channels, allowing them to concentrate on core strategic clients whilst not neglecting wider markets and associated valuable additional sales opportunities.

YB is able to assist vendors and OEMs by acting as a Value Added Reseller (VAR) to offer sales channel partnership to supply and support a broad range of customer businesses.

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