FTN design & development specification (D&D)

SP FTN (D&D) 013

Specification for Lineside Cabinets Without Climate Control

Issue 1, Aug 2002 · FTN D&D specs & typical drawings

Product spec for the unpowered FTN distribution cabinet and its bolt-on DSL repeater housing: construction, security, environment, backplane layout, Mondragon VX verticals, through jumpers, labelling and acceptance tests. Useful when siting or specifying copper distribution cabinets.

Clause map — what each clause deals with

1	Introduction	Background: cabinets to house copper terminations and DSL repeaters on the new FTN.
2	Abbreviations	Acronyms (DIN, DSL, ELR, GLT, MP, MTBF, SPT, WHD).
3	Glossary	Definitions of distribution cabinet, line powered, main cable, repeater housing, tail cable, through jumper, vertical.
4	Scope	Unpowered cabinets only; powered housings are under RT/E/PS/00028.
5	Cabinet Variants	The two products: the cabinet and the attachable repeater housing.
5.1	Distribution Cabinet	Definition of the standalone unconditioned cabinet.
5.2	DSL Repeater Housing	Definition of the end-mounted housing for up to five repeaters.
6	Construction	Physical build requirements for the cabinet.
6.1	General	Design life and compliance with lineside housing siting standard.
6.2	Materials	Preference for metallic superstructure.
6.3	Dimensions	Supplier sets size from contents; notional footprint given for planning.
6.4	Base Details	Compatibility with the small apparatus case concrete base and platform mounting.
6.5	Physical Protection	Anti-vandal measures: panel gaps, hidden hinges and LPS 1175 security rating.
6.6	Rodent Resistance	Materials and sealing against rodents.
6.7	Doors	Single front door, hinge side and opening angle.
6.8	Door Stays	Door stay and the wind load it must hold.
6.9	Cable Entry: Cable Clamps, Glanding Arrangements	Number and diameter range of main and tail cables to be retained, and pull-out force.
6.10	Locks and Handles	Multi-point lock with removable handle and provision for a cylinder lock.
6.11	Roof Profile	Roof shape to deter climbing and shed water and leaves.
6.12	Venting	Ventilation to limit condensation and the internal temperature limit with repeaters running.
6.13	Repeater Housing Access Panels	Removable end panels and void size for cables between cabinet and housing.
7	Environmental Requirements	Conditions the cabinet must survive.
7.1	Operational Environment	Exposed GB lineside locations, polluted/metallic dust and proximity to all traction types.
7.2	Ingress Protection	IP rating required.
7.3	Temperature and Humidity	Temperature and humidity range to be tolerated.
7.4	Vibration	Vibration amplitudes and frequency bands from passing trains, with a time profile per cycle.
8	Finish	Surface finish requirements.
8.1	General	Smooth rounded edges.
8.2	Paint	Paint to the protective treatments spec.
8.3	Colour	Standard cabinet colour.
9	Electrical Requirements	Earthing and bonding provisions.
9.1	Earthing Arrangements	Earth stud location and size.
9.2	Electrical Bonding	All metal parts bonded to the stud with specified earth wire.
10	Fittings	Three pair-count variants and how many VX terminations each gets on verticals A and B.
10.1	Cabinet Backplane	Removable backplane with marine ply area and three DIN rails named verticals A, B and C; backplane layout diagram.
10.2	Cable Terminations	Mondragon VX chosen for unconditioned sites; stranded tails need another termination; table of VX count per vertical by cable size.
10.3	Mounting of Cable Terminations	DIN rail type, terminations per rail, retainer positions, rail lengths for A/B/C.
10.4	Jumpers	A-to-B through jumpers fitted before shipping and swapped for A/B-to-C jumpers when circuits are distributed.
10.5	Jumper Management	Jumper field to manage A/B-to-C jumpers.
10.6	Cable Management	Storing slack per pair, fanning ten-pair groups and dressing cables.
10.7	Moisture Barrier Termination	Terminal block isolating the moisture barrier from earth with a removable link for testing.
10.8	Labelling	Cabinet, vertical and pair labelling.
10.8.1	Cabinet Label	Twelve-digit cabinet identifier format and the external and door labels.
10.8.2	Vertical Labels	Label holders on A and B for the cable identifier (nine-digit format) and the fixed label on C.
10.8.3	Cable Pair Labels	Pair number labels on each vertical, numbering direction and ranges.
10.9	Documentation: Document Holder	A4 holder inside the door.
11	Operational Performance History	Supplier evidence of reliability.
11.1	Experience in Railway Environment	Railway deployment history to be supplied.
11.2	MTBF	Minimum MTBF for the whole cabinet and supporting figures.
12	Maintenance	Maintainability and repair information.
12.1	Repair and Replacement of Cabinet Components	On-site replaceability and repair instructions.
12.2	Repair of Cabinet Finish	Instructions for scratches and graffiti.
12.3	Repeater Housing Access Panels	Maintenance checks on the access panels.
13	Product Acceptance	Acceptance route, sample and tests.
13.1	Product Acceptance Procedure	Product acceptance process and existing certificates.
13.2	Product Sample	Sample 50-pair cabinet with housing for termination trials and demonstration.
13.3	Product Acceptance Tests	Minimum tests to demonstrate.
13.3.1	Vibration Test	Fully fitted cabinet vibration test method and failure criteria.
13.3.2	Drop Test	Corner drop shock test and pass criteria.
14	Shipping	Packaging, lifting and instructions.
14.1	Packaging	Transit protection and what the packaging and door label must state.
14.2	Lifting Points	Lifting points, removable where they could snag.
14.3	Installation Instructions	Instructions supplied with each cabinet.
15	DSL Repeater Housing	Housing requirements, largely by reference to the cabinet sections.
15.1	General Requirements	List of cabinet sections that also apply to the housing.
15.2	Marine Ply Mounting Panel	Ply backplane and repeater screw spacing.
15.3	Dimensions	Housing sized from contents; holds up to five repeaters.
15.4	DSL Repeaters	Repeater unit size, clearance below each and the notional cabinet-plus-housing arrangement diagram.
16	References	Referenced standards.
App A	Concrete Base Drawing BRS-SC 32	Placeholder for the base drawing; not reproduced in this copy.