GR 2949 CORE : ISSUE 1

Preface
1 Introduction
         1.1 Purpose
         1.2 Scope
         1.3 Organization
         1.4 Requirements Terminology
         1.5 Requirement Labeling Conventions
                 1.5.1 Numbering of Requirement and Related Objects
                 1.5.2 Requirement, Conditional Requirement, and
                           Objective Object Identification
2 General Information
         2.1 Description of Product
                 2.1.1 Coaxial Drop Cable
                 2.1.2 Twisted Pair Wires
         2.2 Ordering Options
                 2.2.1 User Considerations
         2.3 Quality Assurance Programs
3 General Requirements
         3.1 Safety Considerations
         3.2 Units and Tolerances
         3.3 Marking
                 3.3.1 Package, Coil, and Reel Marking
                 3.3.2 Jacket Marking
                 3.3.3 Length Marking
                 3.3.4 Jacket Marking Durability
         3.4 End Sealing
         3.5 Compatibility with Hardware
4 Mechanical Design Requirements
         4.1 Conductors of Coaxial Unit
                 4.1.1 Center Conductor of Coaxial Unit
                           4.1.1.1 Resistivity of Center Conductor
                           4.1.1.2 Tensile and Elongation
                                       Requirements
                           4.1.1.3 Factory Joints
                 4.1.2 Outer Conductor (Shield) of Coaxial Drop
                           4.1.2.1 Bonded Shielding Tape
                           4.1.2.2 Shielding Tape Material
                           4.1.2.3 Average Core Diameter
                           4.2.1.4 Core Ovality
                 4.1.3 Braid Wire
                           4.1.3.1 Braid Wire Material
                 4.1.4 Tri-Shield Braid
                 4.1.5 Quad Shield
5 Core Construction
         5.1 Core Layups
         5.2 Binders (for Twisted Pairs Unit)
         5.3 Core Wrap (for Twisted Pairs Unit)
         5.4 Rip Cord (for Twisted Pairs Unit)
         5.5 Filling Compound
         5.6 Flooding Compound
         5.7 Coaxial Cable Jacket
                 5.7.1 Jacket Material Properties
                 5.7.2 Jacket Thickness
                 5.7.3 Jacket Eccentricity
                 5.7.4 Diameter Over Inner Jacket of Coaxial
         5.8 Shields
                 5.8.1 Gopher Protected (GP) Shield
                           5.8.1.1 Gopher Protected Armor
                                       Construction
                           5.8.1.2 Armor
                           5.8.1.3 Armor Splices
                 5.8.2 Non-Gopher Shields
                           5.8.2.1 4- or 5-mil 220 Copper Alloy Tape
                           5.8.2.2 8-mil Coated Aluminium Tape
         5.9 Inner and Outer Jacket
                 5.9.1 Inner Jacket Over Twisted Pairs
         5.10 Outer Jacket Requirements
                 5.10.1 Tensile Strength
                 5.10.2 Elongation
                 5.10.3 Outer Jacket Thickness
6 Completed Cable Physical Tests
         6.1 Wire and Cable Bending Test
         6.2 Longitudinal Shield Fatigue Test
         6.3 Breaking Strength
         6.4 Gopher Resistance Test
         6.5 Light Absorption
         6.6 Water Resistance Test
         6.7 Water Penetration Test
         6.8 Compound Flow
         6.9 Sheath Adherence - Unbonded

         6.10 Hot Bend Test
         6.11 Impact Test
         6.12 Separation of Units Along Web
                 6.12.1 Room Temperature Test
                 6.12.2 Low Temperature Test
         6.13 Flammability
         6.14 National Electrical Code
         6.15 Thermal Wrap
7 Electrical Requirements
         7.1 Electrical Requirements of Coaxial Unit
                 7.1.1 Continuity and Shorts
                 7.1.2 Conductor Resistance
                 7.1.3 Characteristic Impedance
                 7.1.4 Structural Return Loss (SRL)
                 7.1.5 Shielding Effectiveness
                 7.1.6 Attenuation
                 7.1.7 Velocity of Propagation
                 7.1.8 Heat Aging Test
                 7.1.9 Shield Heating Test
                 7.1.10 Insulation Resistance
                 7.1.11 Dielectric Strength
                 7.1.12 Jacket Leakage Test
         7.2 Electrical Requirements of Twisted Pair(s)
                 7.2.1 Continuity and Shorts
                 7.2.2 Conductor Resistance
                 7.2.3 Conductor Resistance Unbalance
                 7.2.4 Mutual Capacitance
                 7.2.5 Capacitance Unbalance
                           7.2.5.1 Capacitance Unbalance -
                                       Pair to Ground
                           7.2.5.2 Capacitance Unbalance -
                                       Pair to Pair
                 7.2.6 Attenuation - Dry
                 7.2.7 Insulation Resistance
                 7.2.8 DC Proof Tests
                           7.2.8.1 DC Proof Test - Conductor to
                                       Conductor
                           7.2.8.2 DC Proof Test - Core to Shield
                 7.2.9 Crosstalk
                 7.2.10 Shield Resistance
                 7.2.11 Shield Heating Test
                 7.2.12 Fusing Coordination
                 7.2.13 Continuity of Metallic Elements
                 7.2.14 Unshielded Buried Service Wire
Appendix A: Water Resistance Test
         A.1 Method
         A.2 Procedure
Appendix B: Sheath Adherence
         B.1 Sample Preparation
References
List of Figures
Figure 5-1 Hybrid Design of Buried Coaxial/Twisted Pair Cable
Figure A-1 Pressure Cell for Water Resistance Test
Figure B-1 Sheath Adherence - Sample Preparation
List of Tables
Table 4-1 Center Conductor Diameter and Resistivity
Table 4-2 Material Properties of Center Conductor
Table 4-3 Average Core Diameter Over Tape
Table 4-4 Core Ovality, Maximum
Table 5-1 Drop Cable Jacket Material Requirements
Table 5-2 Diameter Over Jacket
Table 5-3 Thickness of 220 Copper Alloy Tape
Table 5-4 Minimum Outer Jacket Thickness
Table 7-1 DC Loop Resistance at 20 DEGC (68DEGF) Maximum
Table 7-2 Attenuation of Type I and Type II Cables

Contains the Telcordia's view of generic requirements for Buried Hybrid Coaxial and Twisted Pair Cable which should meet with the typical needs of the Bellcore Client Company. Also included in this document are generic mechanical/electrical requirements, functional design criteria/desired features and test methods for comparing the product against the generic requirements stated.