IEC PAS 62255-1:2001 pdf download Multi-pair cables used in high bit rate digital access telecommunication networks – Part 1: Outdoor cables
Scope
This specification defines outdoor multi-pair cables for use in high bit rate digital telecommunicationnetworks with their relative definitions and requirementsit covers water tight cables, with an overall screen, characterised up to 30 MHz, to be used inoutdoor networks (for example in the subscriber access loop).The electrical. mechanical, transmission performance characteristics of the screened cables.related to their reference test methods, are detailed
1.1 Normative references
This standard incorporates by dated or undated reference, provisions from other publicationsThese normative references are cited at the appropriate places in the text and the citedpublications are listed hereafter, For dated references. subsequent amendments to or revisions ofthese publications apply to this PAS only when incorporated in it by amendment or revision. Forundated references, the latest edition of the cited publication applies, together with any
amendments.
IEC 61156-1, Multicore and Symmetrical Pair/Quad Cables for Digital Communications :Part 1:Generic specification
IEC 60028:1 925, International standard of resistance for copper
IEC 60050, International Electrotechnical Vocabulary (IEV)
IEC 60068, Environmental testing
IEC 60304:1 982, Standard colours for insulation for low-frequency cables and wires
IEC 60344:1 980, Guide to the calculation of resistance of plain and coated copper conductors of low-frequency cables and wires
IEC 6081 1 -1 , Common test methods for insulating and sheathing materials of electric cables – Part 1: Methods for general application
IEC 6081 1 -1 -2:1 985, Common test methods for insulating and sheathing materials of electric cables – Part 1: Methods for general application – Section Two: Thermal ageing methods
EN 50289: Communication cables – Specifications for test methods (Series)
EN 50290: Basic Reference Standard for Communication Cables (Series)
1 .2 Terminology
For the purpose of this PAS, the definitions of IEC 61 1 56-1 apply in addition to the following ones.
• Subscriber loop.
• Bit Rate
• ADSL Asymmetric Digital Subscriber Lines
• ATM Asynchronous Transfer Mode
• DSL Digital Subcriber Line
• EMC Electro-Magnetic Compatibility
• EMI Electro-Magnetic Interference
• FSAN Full Service Access Network
• HDSL High-bit-rate Digital Subscriber Lines
• ISDN Integrated Digital Services Network
• ISDN-BRA ISDN – Basic Rate Access
• ISDN-PRA ISDN – Primary Rate Access
• Mbps Mega-bits per second
• TBD to be determined
• VDSL Very-high-bit-rate Digital Subscriber Lines
• xDSL Generic term referring to all DSLs, ISDN, HDSL, ADSL, VDSL, …
2 General information
2.1 General cable description
These cables are designed for outdoor telecommunication networks, therefore they are water-tight cables
Since these cables are specifically designed for new, various existing and emerging,telecommunication applications that involve high frequency spectrum up to 30 MHz, they include an overall screen to improve the electromagnetic behaviour.
These cables contain from one pair up to 1 50 pairs that can be either in pairs or quads.