TETRA Equipment and Terminals for PMR Networks

Public Safety, Utility and Transport organisations over many years have deployed Private Mobile Radio (PMR) infrastructure equipment with high availability and reliability to provide to provide dedicated, secure communications networks.

Modern implementations of PMR utilise the digital TETRA standard, which provides interoperability between systems and terminals from a range of manufacturers.

@YellowsBestLtd our mission is  “Keeping Customers Operational, by continuing to provided spares solutions, hardware repairs and support services to ensure continued long-term operations and maintenance.  

Examples of the products we have recently been requested to provide spares solutions and repairs services include Motorola Desk Radio Terminals: 

Terminal Products
Part NumberProduct CodeDescription
M47PCC6T25_NMT912MTM700 380-430 MHz DESK Terminal
M80PCC6TZ5_NMT912MMTM800 380-430 MHz DESK Terminal
FIRMWARECLEAR / TEA1 / TEA2Choice for all radios
OPTIONEXP DASHExpand Control Head, 5m cable

If you have similar or other Radio solutions requirements and legacy maintenance services needs, please get in touch to discuss how we may be of assistance.

Professional CCTV Cameras

Many business operations depend on the security delivered by professional standard CCTV cameras, offering reliability, availability and a wide range of advanced features for mission-critical surveillance applications. One manufacturer that provides an extensive range of such products is Bosch; one of their latest models we feature here.

Bosch MIC IP Starlight 7100i Outdoor PTZ

This example of a robust PTZ IP camera is suitable for deployment in extreme outdoor locations that require reliable 24-hour security monitoring. It features a range of advanced imaging technologies as well as Bosch’s Intelligent Video Analytics.

Featuring a 1/2″ 2MP CMOS sensor and a 6.6-198mm motorized zoom lens, the camera captures video at resolutions up to 1920 x 1080 at 60 fps in a 58.3 to 2.1° field of view. The camera delivers color video in lighting conditions as low as 0.0047 lux and uses an automatic IR cut filter to switch from color to B&W for day/night functionality.

An integrated high-speed pan/tilt system with an anti-backlash drivetrain provides 360° continuous panning and 290° tilting at up to 120° and 90° per second, respectively. Housed in an IP68- and IK10-rated enclosure and equipped with a window defroster, the camera is suitable for use in vandal-prone outdoor locations. Audio input and output ports allow for two-way talk while an SD card slot enables onboard storage of footage. ONVIF compliance ensures compatibility with a wide range of surveillance devices.

Solutions for New and Legacy Product Sources and Supply

@YellowsBestLtd seeks out new products and legacy equipment spares to assist with our aim of “Keeping Customers Operational“. Recent enquiries have included not only CCTV cameras, but also the supplying refurbished and surplus stocks of equipment cards, as well as built-to-order cables and connectors to suit exact requirements. Please get in touch to discuss any solutions or services requirements that you have; we look forward to hearing from you!

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 NumberProduct CodeDescription
D-21470EuroEuro Connector 3×7
Connector 3×7 – D-21470
Connector 3×7 – D-21470
Cables
Part NumberProduct CodeDescription
102-722-1Coax-SMB 1mBT3002 Coax Cable BNC Plug to SMB Right Angle, 1m
102-722-3Coax-SMB 3mBT3002 Coax Cable BNC Plug to SMB Right Angle, 3m
102-722-5Coax-SMB 5mBT3002 Coax Cable BNC Plug to SMB Right Angle, 5m

Coax-SMB-5m

Equipment
Part NumberProduct CodeDescription
T37882.02NDUeNDM DC Unit
TA 21513DF 2-8Term. Repeater 2-8 M, 1300nm LED MM/SM
TU 21236.10VF E&MCU 8ch E&M/uP: 1xUKe&m/VF
TU 21216SUB/EXCHChannel Unit SUB/EXCH
SUB/EXCH – TU 21216

More equipment spares are listed here

Searching for Keymile DUP14

Call out for any stocks of Keymile’s Dual Power Input Modules (DUPI4)

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

In particular, we have stocks of surplus and refurbished products from the Keymile UMUX range which we are able to supply to assist customers in maintaining their operational networks.

However, one item not in our stocks that is of immediate interest to several of our clients is the Dual Power Input Modules (DUPI4).

We are urgently seeking supply; if you can assist, please get in touch!

These items provide the ultimate power protection upgrade:

  • Unit centralises alarm functionality and power input control
  • Delivers built-in redundancy
  • Power protection for both sub rack and fan unit
  • Increased the VDC availability

The DUPI4 acts as a dual input power decoupler that selects between two independent VDC power feeds and delivers them directly to the sub rack’s power input. Thus, the DUPI4 ensures uninterrupted service delivery since the power feed change over is instantaneous.

‘Legacy’ telecoms history

The UMUX SDH product portfolio was originally launched 1991 by Ascom, which subsequently became Keymile. Keymile was sold to ABB in 2017 when the UMUX range was discontinued, and then was acquired in 2019 by DZS. 

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.

Spares for 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.  

The definitive ‘Dynanet’ spares list

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).

In particular, we are able to supply products from the ‘Dynanet’ range, given that we have a significant amount of refurbished and surplus equipment items in stock for immediate delivery. Hence there continues to be spares support for current and even increased deployed networks.

Comprehensive Stocklist of ‘Dynanet’ Spares

Whereas the ‘Dynanet’ family contained a wide range of products produced and supplied over many years, some of which are relatively obscure and unlikely to be needed, there are a number of core items that have proved to be always in demand by Customers. Consequently, we have endeavoured to create a comprehensive stock list, containing part numbers, product codes and descriptions and images which is presented here, and would welcome any enquiries you have for spares requirements that we can fulfil. If however, you are seeking something more unusual, then please let us know as we can usually assist. We look forward to hearing from you.

Mechanics
Part NumberProduct CodeDescription
T37870.01NDMNDM 19in 17-slot Subrack
Subrack
19in Subrack – T37870.01
Part NumberProduct CodeDescription
T37871.01NDMNDM DN2 19in 17-Slot Subrack
Power
Part NumberProduct CodeDescription
T37882.01NDUNDM DC Unit
NDU – T37882.01
Part NumberProduct CodeDescription
T37882.02NDUeNDM DC Unit
NDUe
NDUe – T37882.02
Part NumberProduct CodeDescription
T37889.01NBUNDM Backup Unit
NBU – T37889.01
Multiplexers
Part NumberProduct CodeDescription
TC 21101DM2DM2 Multiplexing Unit, 75ohm
DM2
DM2 – TC 21101
Part NumberProduct CodeDescription
CC 24002DB2Branching Unit, B2, 2x2Mb/s, 75ohm
B2
DB2 B2 – CC 24002
Part NumberProduct CodeDescription
CC 24011DB2Switching Unit, X2, 2Mb/s, 75ohm
X2
DB2 X2
Part NumberProduct CodeDescription
CU 24111DN2Control Unit, DN2, 75ohm
CC 24101DN2Interface Unit, IU2, 2x2Mb/s, 75ohm
IU2
DN2 IU2 – CC 24101
Optical Line Units
Part NumberProduct CodeDescription
TA 21513DF2-8Terminal Repeater 2-8M, 1300nm, LED MM/SM
TA 21516DF2-8Terminal Repeater 2-8M, 1300nm, LASER SM
TA 21518DF2-8Terminal Repeater 2-8M, 1300nm, LASER LP
DF2-8 – TA21518
Copper Line Units
Part NumberProduct CodeDescription
T65580ACL2iACL2i PF Gen
ACL2i PF GEN – T65580
VF and Sub
Part NumberProduct CodeDescription
CU 21206SUB/SUBChannel Unit SUB/SUB
SUB/SUB – TU 21206
Part NumberProduct CodeDescription
CU 21206.50SUB/SUBChannel Unit RSM (L/E Start) 6ch
SUB/SUB – TU 21206.50
Part NumberProduct CodeDescription
CU 21216SUB/EXCHChannel Unit SUB/EXCH
SUB/EXCH – TU 21216
Part NumberProduct CodeDescription
TU 21236.10VF E&MChannel Unit 8ch E&M/uP: 1xUKe&m/vf
VF E&M
VF E&M – TU 21236.10
Data Interface Units
Part NumberProduct CodeDescription
TU 21125DIU X.21Data IF Unit 48..64k with sync, X.21
DIU X.21 – TU 21125
Part NumberProduct CodeDescription
TU 24013DIU nx64kData IF Unit 2M, nx64k: G.703/704, 75ohm
nx64k
DIU nx64k – CU 24013
Ethernet & ISDN
Part NumberProduct CodeDescription
TU 21133.03ETHERNETEthernet IF 10/100 2ch, 3+3 if, switch
Supervisory
Part NumberProduct CodeDescription
TC 21705SUPY SUBSupervisory Substation
Special Units
Part NumberProduct CodeDescription
T37885.01RING GENRing Generator
T37885.02RING GENRing Generator + DC/DC converter
RING GEN – T37885.02
Optical Teleprotection
Part NumberProduct CodeDescription
D-24204TPSO C37.94Optical Teleprotection Interface, C37.94
C37.94
TPSO C37.94 – D-24204
Q1 Management
Part NumberProduct CodeDescription
T31094.01DCNADCN Adapter C4.0
DCNA
DCNA – T31094.01
Connectors
Part NumberProduct CodeDescription
D-21470EuroEuro Connector 3×7
3x7
Connector 3×7 – D-21470

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.  

A205HAT00080AAB05HAT00080AABXMP (MK2) POWER SUPPLY 48/60V
AN0005905762.7026.353.00-A001PORT HDB3 (2)                          
AN0009822462.7040.405.00-A001MODUL V.11                        
AN0011478462.7040.303.00-A001ETHERNET ADAPTER                  
AN0011810662.7006.430.00-A002POWER 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

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. 

ADR155c

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.

ADR622

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

Comprehensive Functionality

ADR2500 ‘eXtra’

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.

ADR10000

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 CodeUnit typeDescription
AM101333 / 251 119 665ADR155cA155 BLK STM1/4 21E1 19″/ETSI CORE CHASSIS
AM101330 / 251 137 402ADR 21E120ADR BLK BNC 21E1/120 ITFE CARD
AM101328 / 251 137 366ADR IC1.1A155 BLK FC/PC IC1.1 OPTIC STM1 CARD
251 137 410ADR LAN1A155 BLK ADRLAN 10/100BT ETH ITFE CARD
AM101360 / 251 131 182ADR FANFAN MODULE
AM101670 / 251 137 431ADR EREA155 BLK BNC ELEC STM1 ITFE CARD

Operational Technology (OT) vs Information Technology (IT)

OT and IT: What’s the Difference?

Information Technology (IT)

Information Technology (IT) is a familiar concept to most modern office workplaces encompassing the products and networks providing data-centric computing, supporting various business functions such as finance, personnel, management and administration. This has grown to being fundamental to corporations large and small, and continues to rapidly develop in scale and capability.

Operational Technology (OT)

By contrast, Operational Technology (OT) is understood by utilities, transport, manufacturing and other industrial sectors, as encompassing an array of systems engineering, event monitoring and process control to facilitate operations. Historically, the technologies and products used to implement the required infrastructure have been bespoke and separate from other corporate systems.

The growth of standardisation

With the explosion of computing devices, the internet and communications generally, the underlying IT hardware and software have become ubiquitous and standardised. The majority of businesses now deploy products and networks which are interchangeable with most other global corporations, bringing overall costs down, increasing ease-of-use and enabling global inter-operations.

In recent years, there has been a trend to capitalise on these developments by seeking to replace old OT bespoke systems with widely available and deployed IT products.   

The problem with convergence

Despite the advantages brought by a move to using IT technologies to fulfil Operational infrastructure needs, there are some draw-backs. 

Although no-one wants systems to fail, and high performance is often a key requirement, in traditional OT systems, there is an emphasis on availability, reliability and ‘mission-critical’ operations, dictating deterministic technologies which standard IT products are not designed to provide. The packet-oriented ‘best-efforts’ nature of TCP/IP networking solutions is not sufficient to provide the performance required. Some operational systems have specific timing requirements, utilising PDH and SDH TDM-based technologies to deliver signalling and tele-protection information. 

For years, ‘security’ against ‘remote attacks’ was not an issue, because most OT systems were regionally based and not connected to the wider world. And even those with remote monitoring and control tended to use bespoke equipment which was not widely understood or utilised by non-specialists. With a move to going ‘on-line’, and utilising ‘standard’ IT equipment to fulfil OT requirements, this is no longer necessarily the case. Which brings the possibility of outages due to system or denial of service attacks. ‘Cyber-security’ in recent years has needed to become part of the considerations for OT infrastructure, learning from the experiences of threats to IT systems and ‘denial-of-service’ attacks. 

And whilst modern IT communications bring gigabit data bandwidths, OT data needs have remained modest, often to fulfil the unchanged monitoring requirements for an enormous existing deployed network of slow-speed kilobit data devices, such as pumps, valves and actuators. 

In short, the needs and desires of businesses for computing devices, networking systems and global communications to provide ever-increasing bandwidth and application support continues to diverge from the requirements of industrial operations, requiring availability, compatibility and mission-critical performance.  

Future trends

Whilst vendors of networks, computing and communications continue to develop advanced technologies to meet the growing needs of IT for businesses, the desired ‘convergence’ to replace OT systems continues to be a work-in-progress.

OT systems tend to be built with longevity as a priority over cost of ownership, due to the challenges of replacement once in continuous operation. Whereas IT products are often ‘written down’ and replaced over a much shorter timescale, with a view to taking advantage of continuous developments to provide higher performance and productivity.

Consequently, technologies that are considered ‘legacy’ by IT professionals continue to be maintained and even further deployed as trusted and proven OT systems to fulfil operational needs. 

Your operational systems requirements

@YellowsBestLtd would like to know your infrastructure goals, deployment experiences and maintenance challenges and how we may assist you to fulfil your OT and IT requirements, for both new and existing operational systems. We look forward to understanding your needs for technical support, solutions sourcing, repair services and equipment spares.

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

Remaining stocks of Nokia ‘Dynanet’ spares – Update

Surplus and Refurbished Items for continued operational service

Many Customers have ‘legacy’ telecommunications networks which are continuing to provide good operational service. Particularly where functional requirements have not changed, it makes sense to avoid or delay costly and time-consuming change-out replacement projects, by obtaining spare parts.

@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).

Stocklist of Nokia ‘Dynanet’ Spare Parts – Available for immediate supply

For the ‘Dynanet’ family of PDH Transmission telecoms products, which has provided 20+ years of service, we still have a few spare units are in stock and available for immediate supply. These items have been mostly retrieved from operational service during Customers’ decommissioning projects, and have been refurbished, tested and are warranted for working operation.

Given that production of the majority of the product range was ceased in 2019 or before, it is recommended to consider purchasing spare parts whilst there is still availability.

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
CC 24011DB2 2 Mb/s Switching Unit (X2), 75ohm
CC 24101DN2 2×2 Mb/s Interface Unit (IU2), 75ohm
CC 24111DN2 Control Unit (CU), 75 ohm
CF 24186DN2 19in Subrack
CF 24186.09DN2 19in Subrack, grey-L91 EMC
CG 24170DN2 Bus Power Unit (BPU)
CG 24171DN2 Extended Bus Power Unit (EBPU)
CU 24013Data Interface Unit (DIU) 2M, nx64k: G.703/704, 75ohm
D-21470Euro Connector, 3×7
D-24204Optical Teleprotection Interface Unit, C37.94
T30506.0917-slot DYNANET Subrack
T30851.02Subrack Power Adapter (SPA)
T31094.01DCN Adapter C4.0
DCNA
DCN Adapter C4.0 – T31094.01
Part NumberDescription
T37870.01NDM 19in 17-slot Subrack
T37871.01NDM DN2 19in 17-Slot Subrack
T37882.01NDM DC Unit (NDU)
T37882.02NDM DC Unit (NDUe)
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
T65520.01ACL2 RM DC Power Gen
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
TC 21301DM8 Multiplex Equipment, 75ohm
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) 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: 2xe&m/vf
TU 21255.01Channel Switch, 4 port
TV 21640.08Power Interface Adapter DC