This standard specifies the product classification, requirements, test methods, inspection rules, marking, packaging, and storage and transportation requirements for communication cables - office symmetric cables. This standard applies to symmetrical communication cables (hereinafter referred to as cables) used for the connection between programmable switching equipment, the main distribution frame within the switching station, and the user circuit board of the switching station. It can also be used as short section connection cables within or between other communication equipment. 2 Normative References: The clauses in the following documents become clauses of this standard through reference in this standard. For dated references, all subsequent amendments (excluding corrected content) or revisions are not applicable to this standard. However, it is encouraged for all parties who have reached agreements based on this standard to investigate whether the latest versions of these documents can be used. For undated references, the latest version applies to this standard. GB 730-1998 Textiles - Tests for Color Fastness to Light and Climate - Blue Wool Standard GB/T 2951.1-1997- General Test Methods for Cable Insulation and Sheath Materials - Part 1: General Test Methods - Section 1. Thickness and overall dimensions - Mechanical performance tests - General test methods for insulation and sheath materials of cables (idt IEC811-1: 1:1993) GBT 2951.2-1997, Part 1: General test methods, Section 2. Thermal aging test methods (idt IEC811-1: 2:1985) GB/T 2951.3-1997, General test methods for insulation and sheath materials of cables, Part 1: General test methods, Section 3: Density determination methods - Water absorption test shrinkage test (idt IEC 811-1: 1993) GB/T 2951.4-1997 General Test Methods for Cable Insulation and Sheath Materials - Part 1: General Test Methods: Section 4. Low temperature test (idt IEC 811-1-4:1985) GB/T 2951.7-1997 General test methods for insulation and sheath materials of cables - Part 3: Specific test methods for polyhelium ethylene mixtures - Section 2: Weight loss test - Thermal stability test (idt IEC 811-3-2:1985) GB/T 3953 Round Copper Wire for Electrical Purposes GBT 4910 Tinned Round Copper Wire GB/T 5441.2-1985 Test Methods for Communication Cables - Working Capacitance Test Bridge Method GB 6995.2-1986 Identification Marks for Electric Wire and Cable Part 2: Standard Colors GB/T 11327.1-1999 Polyvinyl Chloride Insulated Polyvinyl Chloride Sheathed Low Frequency Communication Cable Wire Dun Part 1: General Testing and Measurement Methods (neq IEC 60189-1:1986) GB/T 11327.2-1999 Polyvinyl chloride insulated and sheathed low-frequency communication cables and wires - Part 2: Local cables (pair or triple or quad or quintuple) (neq IEC 60189-2:1986) GB/T 17737.1-2000 Radio frequency cables - Part 1: General specification - General principles, definitions Requirements and test methods (idt IEC61196-1:1995) GB/T 18380.1-2001 Fire tests for cables under flame conditions - Part 1: Vertical combustion test method for single insulated wire or cable (idt IEC 60332-1:1993)
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