Products Archives - Page 3 of 4 - Management Services and Solutions

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 Number	Description
24204	TPSO H/W Module
CC 24002	DB2 Branching Unit, B2 2×2 Mb/s 75 ohm
CC 24011	DB2 2 Mb/s Switching Unit, X2 75 ohm
CC 24101	DN2 Interface Unit (IU2) 2×2 Mb/s 75 ohm
CC 24111	DN2 Control Unit (CU) 75 ohm
CF 24186	DN2 19″ Subrack
CF 24186.09	DN2 Subrack 19″, grey-L91 EMC
CG 24170	DN2 Bus Power Unit (BPU)
CG 24171	Extended DN2 Bus Power Unit (EBPU)
CU 24013	Data Interface Unit (DIU) 2M, nx64k: G.703/704, 75 ohm
T30506.09	17-slot DYNANET Subrack
T30851.02	Subrack Power Adapter (SPA)
T37870.01	NDM ACM2 19in 17-slot subrack
T37871.01	NDM DN2 19″ 17-Slot Subrack
T37882.01	NDM DC Unit (NDUe)
T37882.02	NDM DC Unit (NDUe)
T37885.01	NDM Ring Generator

Part Number	Description
T37889.01	NDM Backup Unit (NBU)

Part Number	Description
T65520.01	ACL2 RM DC Power Gen
T65580.01	ACL2i PF GEN Line Terminal Card

Part Number	Description
TA 21513	Optical Line Terminal Repeater 2-8 M, 1300 nm LED MM/SM
TA 21516	Optical Line Terminal Repeater 2-8 M, 1300 nm LASER SM
TC 21101	DM34 Mux Card
TC 21301	DM8 Multiplex Equipment, 75 ohm
TC 21705	Supervisory Substation
TC 21710.01	TMS Adapter
TG 21261	Ring Generator 25HZ 15W
TU 21122.5	Data Interface Unit (DIU) 48..64k V.11 10ch
TU 21124	Data Interface Unit (DIU) NX64k V.11/V.35/X.21 2CH
TU 21124.05	Data Interface Unit (DIU)
TU 21125	Data Interface Unit (DIU) 48..64k with sync, X.21

Part Number	Description
TU 21205	Channel Unit SUB/SUB
TU 21206	Channel Unit SUB/SUB

Channel Unit Subscriber / Subscriber – TU 21206

Part Number	Description
TU 21215	Channel Unit SUB/EXCH
TU 21216	Channel Unit SUB/EXCH

Channel Unit Subscriber / Exchange – TU 21216

Part Number	Description
TU 21234.20	Channel Unit E&M/VF-P, 10 CH, 20 E&M CH
TU 21236.10	Channel Unit (CU) 8ch E&M/uP: 2xe&m/vf
TU 21255.01	Channel Switch, 4 PORT
TV 21640.08	Power Interface Adapter DC

‘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.

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.

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

Nokia ‘Dynanet’ Telecoms – Stock disposal

‘Last chance’ for spares!

The Nokia ‘Dynanet’ family of PDH Transmission telecoms products has served customers well for the last 20+ years, and indeed some networks continue providing good operational service.

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

However, demand has recently reduced and warehouse space is needed, so now the time has come to recycle / dispose of a large proportion of the remaining equipment. Consequently, there remains a short-term opportunity to obtain any items still required to maintain existing deployed infrastructure, before the products are gone.

Here is a stock list of the main items currently available, 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 – before it’s too late! We look forward to hearing from you.

Part Number	Description
24204	TPSO H/W Module
CC 24002	DB2 Branching Unit, B2 2×2 Mb/s 75 ohm
CC 24011	DB2 2 Mb/s Switching Unit, X2 75 ohm
CC 24101	DN2 Interface Unit (IU2) 2×2 Mb/s 75 ohm
CC 24111	DN2 Control Unit (CU) 75 ohm
CF 24186	DN2 19″ Subrack
CF 24186.09	DN2 Subrack 19″, grey-L91 EMC
CG 24170	DN2 Bus Power Unit (BPU)
CG 24171	Extended DN2 Bus Power Unit (EBPU)
CU 24013	Data Interface Unit (DIU) 2M, nx64k: G.703/704, 75 ohm
T30506.09	17-slot DYNANET Subrack
T30851.02	Subrack Power Adapter (SPA)
T37870.01	NDM ACM2 19in 17-slot subrack
T37871.01	NDM DN2 19″ 17-Slot Subrack
T37882.01	NDM DC Unit (NDUe)
T37882.02	NDM DC Unit (NDUe)
T37885.01	NDM Ring Generator
T37889.01	NDM Backup Unit (NBU)
T65520.01	ACL2 RM DC Power Gen
T65580.01	ACL2i PF GEN Line Terminal Card
TA 21513	Optical Line Terminal Repeater 2-8 M, 1300 nm LED MM/SM
TA 21516	Optical Line Terminal Repeater 2-8 M, 1300 nm LASER SM
TC 21101	DM34 Mux Card
TC 21301	DM8 Multiplex Equipment, 75 ohm
TC 21705	Supervisory Substation
TC 21710.01	TMS Adapter
TG 21261	Ring Generator 25HZ 15W
TU 21122.5	Data Interface Unit (DIU) 48..64k V.11 10ch
TU 21124	Data Interface Unit (DIU) NX64k V.11/V.35/X.21 2CH
TU 21124.05	Data Interface Unit (DIU)
TU 21125	Data Interface Unit (DIU) 48..64k with sync, X.21
TU 21205	Channel Unit SUB/SUB
TU 21206	Channel Unit SUB/SUB
TU 21215	Channel Unit SUB/EXCH
TU 21216	Channel Unit SUB/EXCH
TU 21234.20	Channel Unit E&M/VF-P, 10 CH, 20 E&M CH
TU 21236.10	Channel Unit (CU) 8ch E&M/uP: 2xe&m/vf
TU 21255.01	Channel Switch, 4 PORT
TV 21640.08	Power Interface Adapter DC

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

‘Legacy’ Networks; long history, but still important and operational!

Back in the day, when PDH (Plesiochronous Digital Hierarchy) was all there was for telecommunications optical and copper transmission, a familiar site was the ‘Multiplexer Mountain’.

PDHMultiplexers — PDH Multiplexer Mountain

Then came the new transport technologies: SDH (Synchoronous Digital Hierarchy) for high-speed digital communication (via optical fibre and radio links); and (D)WDM ((Dense) Wave Division Multiplexing) as an optical solution for raising the capacity of existing fibre networks (particularly when the fibre-count was limited).

Nokia launched the ‘Synfonet’ range as the big brother to their successful ‘Dynanet’ PDH portfolio, with SDH capacity of initially STM-1 (155MBit/s) and STM-4. Later came STM-16 and WDM.

Synfonet – STM-1/4

All in one subrack (REG, TM, ADM, DXC)
Wide range of tributaries
64kbit/s cross-connection server
Upgradable from STM-1 to STM-4 while in service
Compact, flexible and easy to expand

Synfonet – STM-16

2.5 Gbit/s, four times the throughput rate of STM-1/4

Synfonet – WDM

4–channel multiplexing / demultiplexing
8-channel multiplexing / demultiplexing
Up to 20 Gbit/s per fibre

But in 1999, Marconi Communications acquired (for over $100M) Nokia’s Synfonet brand, SDH and DWDM transport equipment products and about 120 staff from its Cambridge research and development business under the deal.

Inevitably over time Marconi rationalised their portfolio and the Synfonet range was discontinued, in favour of the SMA and MSH SDH equipment.

Business however took a downward path and in 2005 Ericsson acquired the key assets of Marconi (for SEK 16.8 billion). “Marconi” then became the registered trade-mark branding for Ericsson to promote these products, until phasing them out.

Marconi® Series 1 SMA1 Multiplexer

Flexible SDH Multiplexer
Terminal, Add/drop (ADM) or Digital Cross-Connect (DXC)

Marconi_SMA_Series1_PowerSupply — Marconi_SMA_Series1

Marconi® Series 3 & 4 SMA Multiplexers

Full range of options, including size and power variants
SMA1, SMA4, SMA16c and SMA16c+ Series 3 models
Tributary interfaces from 2MBit/s to STM-4
SMA1/4, SMA1/4c, SMA1/4E and SMA1/4UC Series 4 models
Supports ATM and IP with enhanced data functionality
Metro access and metro core deployment, and customer premises

Marconi® SMA 16-64 Multiplexers

Advanced ADM, DXC and low-order aggregator
Delivers 2.5GBit/s and 10GBit/s data transport capabilities
Full VC-12 granularity allowing single-layer access without VC-4 layer
Metro core deployment

Marconi® MSH Series

Family of STM Multiplexers, Regenerators and Cross Connects
MSH11C, MSH41C, MSH51C, MSH63, MSH64, MSH64C and MSH86 Models.

Marconi® MSH2K

Foundation of Marconi’s switching portfolio
DXC functionality, capacity of 320GBit/s
Support for STM-1 to STM-64 electrical interfaces
Embedded DWDM and support of SDH protection / restoration
Seamless transition from Ring to Mesh network architectures
Capable of upgrade to Multi-Layer Switch (MLS)
Metro core deployment

Marconi® MSH64C

Based on same platform as MSH2K
Core ADM/XC, 80GBit/s switch, capacity of 32 x STM-64 interfaces
Consolidating and grooming traffic.
Gigabit Ethernet interfaces for data transport
Embedded DWDM interfaces

From 2007, Ericsson launched the (still) Marconi® branded OMS (Optical Multi Service) portfolio of advanced SDH multiplexers, including OMS 1200, OMS 1400 and OMS 1600 providing multi-service products for Metro-Edge and Metro networks. The “Marconi” brand was later dropped by Ericsson for this OMS range.

OMS 1200 range

Range of SDH ADM
Optimised for ring and terminal applications

OMS 1400 range

Compact energy efficient multiservice and packet optical transport.
Optimized for use in Metro Access networks
Carrier class Ethernet and TDM services interworking with metro and core Networks based on SDH, Ethernet or IP/MPLS
Applications ranging from high capacity customer sites, fixed or mobile backhaul/Radio Access Network (RAN) aggregation and transport

OMS 1600 range

Compact, multiservice transport and switching platform
Terminal, Add/Drop and Cross-connect multiplexers
Line, ring, star and meshed networks
Modular configurability, comprehensive switching options
High port density reducing space and power consumption
Range of data and TDM services, fulfilling ITU- T G.782 requirements

The OMS range provided packet evolution capabilities to Ericsson’s optical networking portfolio and strengthened its Full Service Broadband offering, meeting the demand from operators to evolve their network to support a mix of services and traffic types, with dexterous backhaul connectivity, TDM or Ethernet-based, with telecom quality, flexibility and scalability.

Perhaps this ‘potted history’ helps explain the ’journey’ these products took, and clarifies why they can be referred to as both Nokia and Marconi, or indeed Ericsson. Although now discontinued by these manufacturers, the products are extensively deployed and still in use by Telecoms Operators, Utilities and Transport companies.

Supporting ‘Legacy’ Networks and Keeping Customers Operational

From time-to-time Customers benefit from services from @YellowsBestLtd

Locating Nokia, Marconi, Ericsson (and other vendors) hard-to-find replacement items
Hardware repair services to existing parts
Supplying additional spares for newer systems to increase capacity or provide alternative interfaces

This way these ‘legacy’ but still important networks can continue to be maintained and kept operational.

To illustrate the possible requirements for spares and repairs, some key parts from the above networking technologies are listed, as follows:

Nokia - Synfonet

Part Code	Family	Description
STM-4 (T30023.01 – 71.02)	Synfonet	STM-4 card
STM-16 (T30172.02 – .06)	Synfonet	2 x STM-1/4 WDM Mux
WDM MUX (T30172.41)	Synfonet	2 x STM-1/4 WDM Mux
STM-1 E/140M (T3033.01)	Synfonet	140Mbit/s STM-1 electrical IU
34M/45M (T30046.02)	Synfonet	34/45Mbit/s electrical IU
2M TA (T30041.01 – 43.01)	Synfonet	2Mbit/s interface units
CU (T30073.01)	Synfonet	Node control and timing unit
SSW (T30053.01)	Synfonet	System Switch Unit
SU-A (T30084.01)	Synfonet	Service unit / EOW
SPIU (T30093)	Synfonet	PSU Card
TSW0 (T30110.01)	Synfonet	64 kbit/s cross-connect unit
TSW1 (T30063.01)	Synfonet	Cross-connect unit for STM-4

Marconi - SMA / MSH

Part Code	Family	Description
02HAM00002AAJ	SMA-1/4	21 X 2M LTU Balanced
02HAM00003AAL	SMA-1/4	63 X 2M LTU Unbalanced
03HAT00010AAS	SMA-1/4	10/100MB Ethernet Module
1HAM61217AAK	SMA-1/4	Power Unit
1HAT 60796 AKU	SMA-16	STM-16 OPT.TCM AHK S16.1 (SC)
1HAK 60596 AAE	SMA-16	STM-16 RX OPT S16.1
1HAK 60701 ABM	SMA-16	STM-16 TX OIC 1310nm (FC/PC)
1HAT 60730 ADL	SMA-16	STM-16 LINE UNIT 1550nm (FC/PC)
1HAT 60730 AJX	SMA-16	STM-16 LINE UNIT 1310nm (FC/PC)
1HAT 60730 AMA	SMA-16	STM-16 L-16.1 SC
1HAT 60730 ANS	SMA-16	STM-16 L-16.2/3 SC
SN99AD	SMA-16	Power Supply Unit

Part Code	Family	Description
133-1467/01	MSH86	Matrix Shelf
131-9475/21	MSH64	STM-64 S64.2 SC/PC
131-9475/22	MSH64	STM-64 L/V/U64.2 SC/PC
131-8685/01	MSH11C	3 X 34MBit/s Tributary Unit G.703
133-1260/01	MSH84	MSH86 Shelf Type 5
130-3118/01	MSH84	Trib Matrix Board
130-3132/01	MSH84	Control Matrix Sub Unit
130-3142/01	MSH84	Main Control Sub Unit
1MBD60697AAT	MSH2K	Shelf
02MBB00001ABG	MSH2K	S-16.1 Module, LC
02MBB00001ACY	MSH2K	L-16.1 Module, LC
02MBB00001ADR	MSH2K	L-16.2 Module, LC

Ericsson – OMS

Part Code	Family	Description
03HAG00001AAX	OMS1200	A/D Mux System Chassis
03HAM0019AAQ	OMS1200	HI Power DC Supply
03HAN00007AAH	OMS1200	AC Power & Battery Backup
03HAN00009AAM	OMS1200	Fan Unit
03HAT00041AAQ	OMS1200	Common Control ADM Unit-A
03HAT00041ABH	OMS1200	Common Control ADM Unit-B
03HAT00045ABR	OMS1200	Ethernet Prnt Card
1HAT61107ABC	OMS1200	64 x 2M Core Trib Card
1HBA60828AAX	OMS1200	32x 2M Unbalanced LTU
1HBA60832AAA	OMS1200	32x 2M Balanced LTU
1HAT61106BAE	OMS1200	Comm/Aux/ANC Unit
1HAM61217ABC	OMS1200	Power LTU Mod

Part Code	Family	Description
03HA500032AAC	OMS1664	STM-1 Switch Card
03HAM00006AAT	OMS1664	STM-1 Line Terminating Card
03HAM00015AAG	OMS1664	10/100 Electrical LTU-Type 2 (SK57BC)
03HAT00015AAD	OMS1664	STM-4 Line Card
03HAT00016AAF	OMS1664	STM-4/16 Core Card
03HAT00021AAK	OMS1664	STM-16 Line Card
03HAT00020AAH	OMS1664	STM-64 Line Card
03HAT00029ACM	OMS1664	16xE1
03HAT00053AAK	OMS1664	140M Transmux Card
03HAT00057ABL	OMS1664	Ethernet L2 Data Switch Prnt Card
03HAT00054AAM	OMS1664	Ethernet Layer 2 (8+16 Ports) (SK58AB)
03HAT00057ABL	OMS1664	COMPAC FLASH card
1HAG60619AAK	OMS1664	Standard Shelf
1HAG60620AAF	OMS1664	Compact Shelf

Please get in touch and let us know what you need to keep your network in good shape!

“TESTERS” – Test Equipment to suit all deployed technologies

Customers who own infrastructure systems usually require some form of test equipment to assist with the build, operation and maintenance activities.

Given the mixture of old and new technologies now deployed, consequently the range of available test equipment options has grown considerably. And like the infrastructure systems themselves, new functionality demands and obsolescence issues also affect the associated test equipment needs and availability.

@YellowsBestLtd assists Customers by sourcing the required test equipment, supplying either modern or legacy units. Often refurbished ex-hire equipment in excellent condition and at commercially attractive prices makes sense over leasing. This ensures the continued availability of sets of the appropriate specification, which may become discontinued by the manufacturers over time.

If necessary, we can also arrange the repair of existing units, especially those that perform very specific functions that cannot easily be replicated with more recent equipment.

There follows a brief description of many of the types of test equipment available; we would be very keen to hear from you to understand your specific requirements, so please get in touch!

Calibration Checkboxes

Calibration checkboxes, or electrical checkboxes, are used for routine observations of test equipment and allow users to maintain accuracy in between official calibration procedures. Suitable for use with PAT testers and with other testers and instruments.

Component Analysers

These test the efficiency and status of components including transistors and capacitors. An essential instrument for development engineering when specific components are used in product design.

Earth Loop Testers

Loop impedance testers, or loop testers, verify the loop impedance of a live electrical circuit without disconnecting from the electrical supply. Most testers include non-tripping RCD technology as standard to prevent unexpected outages.

Earth Testers

These verify that electrical current paths are safely earthed. Earth spike testers, high current loop testers with earth stakes and leads are available.

EMF Meters

EMF meters are used for verifying the presence of electrical magnetic fields given off by electrical equipment. Ideal for use in heavy-duty electrical applications and laboratory testing conditions.

EVSE Testers

EVSE testers are purpose-built for the installation, testing and maintenance of electrical vehicle supply equipment and are an essential for use by electrical vehicle charging point installers, manufacturers and anyone else involved with EVSE equipment.

Insulation & Continuity Testers

A wide range of insulation and continuity testing instruments which include Megger insulation testers, insulation resistance testers, Fluke testers and insulation meters from Amprobe, DiLog, Seaward, Metrel, Martindale, Kewtech and Extech.

LCR Meters

LCR meters get their name from their testing capabilities – they can test inductance (L), capacitance (C) and resistance (R).

Multifunction Testers

Ideal for use when completing or testing an electrical installation. The huge range of MFTs include the Fluke 1600 range and Megger installation testers.

Optical Fibre Inspectors

Quickly find and inspect the right port. Like having a built in flash-light so you can see in dark areas and dense panels. Pause button holds the image for viewing when it’s hard to get it just right. Bright backlit display. Screw-on probe tips to support most connector types.

Optical Fibre Visual Fault Locators

Locates fibres, finds faults, verifies continuity and polarity. Locates visual faults including tight bends, breaks and bad connectors. Easily verifies polarity and identifies fibres. Features continuous and flashing modes.

Optical Power Meters

Multimode and Singlemode Power and Loss Measurements. Multiple kit configurations with light sources for single mode, multimode and PON fibre optics. Min/Max capability automates tracking of intermittent power fluctuations.

PAT Testers

For Portable Appliance Testing (PAT) routine safety checking of electrical equipment, including dual insulation test voltages and portable RCD lead testing, with adjustable PASS testing limits and substitute/mains powered leakage testing procedures.

Power Quality Analysers

These provide a comprehensive snapshot of how power is being used in your facility and verify where energy is being lost. The latest power analysers and power analysis tools include those from Fluke and Hioki.

Production Line Safety Testers

Perfect for laboratories and product design applications, the equipment in this category can be used to verify electrical safety, service equipment using multiple electrical parameters and to simulate PAT conditions.

Proving Units

An essential accompaniment to a voltage tester, proving units verify that the tester remains accurate both before and after testing. Both the NICEIC and NAPIT strongly recommend using these regularly when testing.

RCD Testers

For testing RCD trip time and overall residual current device safety/efficiency. Available are handheld RCD testers, Megger RCD testers, RCD analysers and multifunctional RCD testers which also measure loop and PSC.

Socket Testers

These testers are placed into a socket to assess faults with the wiring using audio/visual feedback.

Telecom Datacom Analysers

Ideally suiting traditional telecommunications networking requirements, typically providing testing at V.24, V.35, V.11/X.21 interfaces at rates up to 2 Mb/s. Also a full range of BER/BLER measurements, control-circuit timing analysis with transitions diagrams and storage in text and graphic form.

Voltage Testers

Voltage Testers

These verify the presence of voltage, and allow full test of voltage levels. Instruments are available from the leading test equipment manufacturers such as Fluke, Kewtech, Martindale, Amprobe and Megger.

Legacy and New Infrastructure Spares

Most Customers’ infrastructure systems now consist of a wide range of technologies from the very old to relatively recent, having been built to serve operational requirements for a number of years. In many cases, these requirements don’t significantly change, and it therefore makes sense to keep these systems in place to maximise the use of the investment and avoid whole-scale change-outs that would be costly, disruptive and unnecessary.

@YellowsBestLtd locates hard-to-find replacement spare parts to keep legacy infrastructure in operational service that has been deemed ‘obsolete’ by the manufacturers, as well as supplying additional spares for newer systems that can be used to increase capacity or provide alternative interfaces.

Typically we provide refurbished spares, tested and working, but often it is the case that unused products from surplus stocks can be supplied. Hence for both old and new systems, we are usually able to source parts at very commercially competitive rates and with short lead-times.

Here is a selection of items that we’ve recently been helping customers procure or obtain parts for. Keen to hear what requirements you may have, so please get in touch.

Alcatel	AnyMedia Access System
Bosch	MIC-400, -550 and -7130 Cameras
Dialogic	I-Gate 4000 System
Huawei	UMG8900 Node
Marconi	ST68NB Matrix and 1HAT60558ADV
Meraki	MS250 switch and MR52 access point
Motorola	Terayon DM6400 Network CherryPicker
Nokia	Dynanet PDH Subrack and 9500 MPR ODU
Pelco	S5220 Spectra CCTV Camera
Siemens	SRT1 C Base Band Unit

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 supply for #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.

Eventually there does come a time when it proves necessary to remove and replace network infrastructure. Rather that simply discarding the old system elements, we can provide ‘value recovery’ to the Customer by means of resale of working parts and recycling of components, extracting useful materials. This often proves financially beneficial, generating a source of funds which helps to pay for the replacement systems, as well as providing an ethical means of disposing of unwanted parts with the least environmental impact.

Please get in touch should you wish to discuss your operational requirements and see how @YellowsBestLtd can be of assistance.

Recommended reading on the wider aspects of ‘The Future of Waste’ can be found in:

@TheIET @EandTmagazine Volume-12_Issue-11

Professional CCTV Cameras

In response to a strong demand for a diverse range of Professional CCTV cameras, we are providing both new and refurbished ‘legacy’ models from a number of manufacturers, to suit our clients’ exact requirements.

Industrial and professional use dictates key features such as a robust weather-proof housing, excellent optical quality, Pan Tilt & Zoom (PTZ) with high magnification, plus options including wiper (for clearing the lens), heater (for extended operating temperature range) and privacy masking. To support existing deployed networks, matching the communication protocol is critical, as well as the appropriate video standard (e.g. PAL).

There follows descriptions of some of the cameras YellowsBest has recently sourced and supplied to our customers, however, we are always keen to receive further enquiries and seek to provide alternatives as necessary; please contact us to discuss your requirements.

Bosch MIC series PTZ cameras

The MIC Series are best-fit cameras for high quality surveillance security applications, installed into the harshest of environments, thanks to its IP68 rating. This tough and vandal-resistant casing provides protection from the elements and physical attack. An integrated, long life silicone wiper, and a reversible rain shield ensure high quality images regardless of the installed environment.

The brushless-motor technology offers ultra-reliable operation with full 360º continuous rotation pan and 186º tilt control for exceptional viewing capability. Small increment pan speeds from just 0.2º per second to 120º per second gives the user precise control. This speed control is especially important when used with video analytic systems, particularly for tracking subjects when fully zoomed in. The MIC Series cameras are simple to integrate and use within systems that already use Bosch AutoDome cameras.

Typical of the range of products meeting professional needs, Bosch cameras have been available for a considerable time, and whilst continuing to fulfil the same basic requirements, have undergone a number of changes over the years in the portfolio which are important to understand. In particular, Bosch previously acquired the range of cameras from ‘Forward Vision’, and consequently it is critical when sourcing additional units to match the communication protocol in use i.e. FV, Pelco or Bosch. The main models (ranging from previously produced and currently available) include:

MIC-300 Series
MIC-400 Series
MIC-500 Series
MIC-550 Series
MIC-612 Series
MIC-7000 Series
MIC-9000i Series

There are also two product families, the ‘Classic’ standard camera and the more advanced ‘Professional’ series.

Therefore it is worth analysing the structure of the full model number in detail to ensure all requirements are met:

EXAMPLE MODEL NUMBER: MIC-500-AL-B-U-R-1-4-6-18-P

Explanation:

MIC – Metal (IP68 weather proof housing)

500 – Camera series (e.g. 300, 400, 440, 500, 550)

AL – Case Style (AL = Aluminium, STS = Stainless Steel, IR = Infrared LEDs included)

B – Colour (i.e. Black, Grey, White)

U – Configuration (C = Cantered, U= Upright)

R – Protocol (W = Forward Vision, P = Bosch, D = Pelco P/D, R = multi-protocol (S/W selectable))

1 – Wiper (1 = Wiper fitted, 2 = No Wiper)

4 – Heater (3 = Heater fitted, 4 = No Heater)

6 – Privacy masking (5 = Privacy fitted, 6 = No Privacy)

18 – Optical Zoom (18x, 28x, 36x etc)

P – Video standard (i.e. PAL, NTSC)

Not all options were available for all camera types, and the above model numbering applies to the ‘Classic’ series products. For the ‘Professional’ series, the ‘UR136’ part of the above number is omitted, since these models are by default Upright, multi-protocol units with the Wiper, Heater & Privacy functions included. Hence the part number is shorter, e.g. MIC-500-AL-B-18-P.

360 Vision Technology ‘Predator’ cameras

Since its inception in 2002, 360 Vision Technology has developed an extensive range of analogue, high definition IP, white light, infrared, cooled and uncooled thermal, polished stainless steel and radar controlled CCTV surveillance cameras to suit a broad range of general and harsh environment applications across many market sectors.

The Predator is a high performance, fully featured range of ruggedised PTZ Cameras designed and manufactured in the UK. The Predator range comes with multiple protocols as standard allowing quick and simple integration with many leading DVR’s, matrices and IP VMS systems. The Predator range covers all applications with a comprehensive range of models including analogue, HD, Thermal, Radar, and Stainless Steel versions. Predator cameras can be supplied in any colour, in any quantity.

Key features:

NEW Sony Starvis Modules – Ultra low light performance
ONVIF 2.4 Profile S Fully Compliant
Full Web Server Set Up
1080p Full HD 2MP
30x and 20x Optical Zoom options
Ultra Low Light options (0.1Lux colour)
ANPR compatible
Privacy zones as standard
High Light Suppression to eliminate glare from vehicle headlights and other bright objects
High quality accurate motors
Colour / mono, Analogue and IP camera options
Triple Slip Ring technology for preset accuracy and smooth movement
Rain Guard around the optical glass to reduce water on the screen
IR option for 400m illumination
Dual IR & White Light LED Option for 250m (IR) 250m (White Light)
Wiper option with programmable wipe settings
Washer option
Inverted or upright mount
Easy & quick setup software
UK supported and supplied
Colour at Night™ Technology for true colour at night
Unique alarm activated White Light illumination for enhanced CCTV Surveillance
Any colour Paint & Finish options
Marine Paint Preparation with 10 Year Paint Guarantee

Ganz ZC-YX/NX270 Series – 700 TVL Digital Day/Night cameras

These high performance camera features Ganz GX5 technology, combining 700TVL, WDR (wide dynamic range), intelligent image enhancement and advanced OSD controls. These highly sensitive cameras are designed to deliver an unprecedented level of resolution, sensitivity and control for optimal video surveillance in all conditions.

Key features:

700 TVL Super High Resolution
Extremely High Sensitivity Day/Night mode 0.07 lux (colour), 0.007 lux (B/W)
Super Low Light Performance 0.00015 lux (Sens up, 512x mode)
Automatically switches between 4 pre-programmed profiles for best image results
Smart Day/Night mode synchronizes with IR LED
2D/3D Digital Noise Reduction
Test Pattern Output with colour bar
12VDC or 24VAC Operation, Auto-Sensing
UL Listed
A time saving Pro-Pak kit is available for outdoor installations, including camera and a selection of Day/Night compatible varifocal lenses pre-installed in a rugged outdoor housing
True WDR, Digital Day/Night and True WDR, True Day/Night models also available.

Nokia ‘Dynanet’ – Still Operating, Still in Demand!

Nokia ‘Dynanet’ PDH Telecommunications Product Portfolio

Still Operating, and Still in Demand!

We’re pleased to have recently helped Customers locate additional spares of this incredibly reliable and therefore popular telecommunications infrastructure equipment.

The range was originally produced by Nokia, and has been extensively deployed and in operational service around the world for over 20 years. It has formed the backbone of PDH and Access networks for many Customers across the Telecom Operator, Utilities and Transportation market sectors.

Recent Requirements

We’ve recently supplied Customers with these spare parts:

Smart Branching Unit (TU 21743)
DC/DC converter -24..-48V / -48V,-60V (21263)

These represent popular choices, but see below for an extended list of other immediately available items.

Future Dependability

It makes sense for Customers to use these spares as replacements as well as to add additional capacity to their existing networks, given the faultless performance of the products, rather than undertake costly and time-consuming wholesale replacements, given that in many case their basic telecommunications requirements have not changed.

Plus the ‘Dynanet’ product range has proven itself to be dependable over an extended period. How many of the latest products will be available in 5 or 10 years’ time, let alone in over 20 years?

Dynanet – an overview

Nokia DYNANET is a family of multiplex, branching, cross-connect and line equipment.

The DM2 equipment has been designed for multiplexing analogue speech and signalling as well as data channels of different bit rates into a common 2 Mbit/s frame. The dynamic branching equipment DB2 and the cross-connect equipment DN2 increase the flexibility and application range in the DYNANET family.

The DYNACARD data channel unit selection covers the bit rates from 0.3 kbit/s up to 1984 kbit/s compliant with the V- or X-series of the ITU-T Recommendations. Other DYNACARD channel units provide specialised interfacing functions for Voice and Data applications.

The heart of the equipment is a MUX unit which is common to all channel and special units of the DM2 system. The MUX unit communicates through a 2 Mbit/s internal bus with the tributary units and carries out the 2048 kbit/s framing according to ITU-T G.732 standard.

The common MUX unit also inserts the signalling information into time slot 16 or provides the time slot 16 as a 64 kbit/s data interface, e.g., for use with a separate signalling equipment.

Analogue and digital services are realised with interface-specific channel units that connect to the DYNACARD bus. The channel units contain from one to ten voice channels, depending on the complexity of the interface.

Each individual voice or data channel can use any 64 kbit/s time slot, several time slots or only part of the capacity of one time slot. The allocation of time slots to different voice/data channels is independent of physical unit placement.

The DYNACARD VF channel unit selection provides analogue interface with signalling adaptation ranging from subscriber signalling to various types of junction line signalling. The signalling can be either channel associated or common channel signalling. In subscriber applications subscriber line testing is also available.

Immediately available from Refurbished Stock

Here is a list of items currently available from refurbished stock. All in excellent working condition, and can be delivered in a matter of days. No long lead time! But do remember that many items may be in short supply, so worth acting now and purchasing any spares you might need to avoid future disappointment!

Part Number	Description
24204	TPSO H/W Module
CC 24002	DB2 Branching Unit, B2 2×2 Mb/s 75 ohm
CC 24011	DB2 2 Mb/s Switching Unit, X2 75 ohm
CC 24111	DN2 Control Unit (CU) 75 ohm
CF 24186.09	DN2 Subrack 19″, grey-L91 EMC
CG 24170	DN2 Bus Power Unit (BPU)
CU 24013	Data Interface Unit (DIU) 2M, nx64k: G.703/704, 75 ohm
CU 24101	DN2 Interface Unit (IU2) 2×2 Mb/s 75 ohm
T30506.09	17-slot DYNANET Subrack
T30851.02	Subrack Power Adapter (SPA)
T37870.01	NDM 19in 17-slot subrack
T37882.01	NDM DC Unit (NDUe)
T37889.01	NDM Backup Unit (NBU)
T65580.01	ACL2i PF GEN Line Terminal Card
TA 21513	Optical Line Terminal Repeater 2-8 M, 1300 nm LED MM/SM
TA 21516	Optical Line Terminal Repeater 2-8 M, 1300 nm LASER SM
TC 21301	DM8 Multiplex Equipment, 75 ohm
TC 21710.01	TMS Adapter
TF 21090.09	Subrack 19″, (EMC), grey
TU 21122.5	Data Interface Unit (DIU) 48..64k V.11 10ch
TU 21125	Data Interface Unit (DIU) 48..64k with sync, X.21
TU 21236.10	Channel Unit (CU) 8ch E&M/uP: 2xe&m/vf

This represents a list of the most common elements Customers need, but please do contact us if there’s something specific you’d like us to seek out for you. Always happy to help!