This specification covers a variety of compounds used for flooding the shields and armors of telecommunications wires and cables (both electrical and fiber optic) for the purpose of preventing water and other undesirable fluids from entering or migrating along or through the cable sheath. The material may be of any chemical composition suitable for the intended purpose and should meet the requirements specified. The flooding compound shall display adhesive properties to provide adhesion between metallic sheath elements and the outer jacket materials of wire and cable. All flooding compounds manufactured in conformance to this specification shall meet the following requirements: homogeneity and foreign material.1.1 This specification covers a variety of compounds used for flooding the shields and armors of telecommunications wires and cables (both electrical and fiber optic) for the purpose of preventing water and other undesirable fluids from entering or migrating along or through the cable sheath. (For related standards see Specifications D4731 and D4732.)1.2 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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This specification covers a variety of petroleum-based and other compounds used for filling the air spaces in telecommunications wires and cables (both electrical and fiber optic) for the purpose of preventing water and other undesirable fluids from entering or migrating through the cable structure. The two basic types of filling compounds are specified: Type I which are general-purpose filling compounds that include all materials to be used for filling cables that are not required to function under electrical stress and Type II which are electrical-type filling compounds that include materials having prescribed electrical properties and used for filling wires and cables that are required to function fully or partially under electrical stress. Filling compound furnished shall inhibit the corrosion of any metallic wire and cable elements with which it comes in contact, while serving as a radial and longitudinal barrier to moisture transmission. Contact of the filling compound with any cable component shall not cause degradation of performance of the cable component. The filling compound shall display adhesive properties to provide adhesion between metallic sheath elements and the outer jacket materials of wire and cable. The following properties of filling compounds manufactured shall be determined: homogeneity, color and opacity, color stability, foreign materials, and other properties that includes volatility, thermal oxidative stability, and corrosion prevention.1.1 This specification covers a variety of petroleum-based and other compounds used for filling the air spaces in telecommunications wires and cables (both electrical and fiber optic) for the purpose of preventing water and other undesirable fluids from entering or migrating through the cable structure. (For related standards see Specifications D4730 and D4732).1.2 A hot-application compound is a material that requires melting in order to be applied as a liquid and its melting point affects its performance in the finished cable product.1.3 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard.1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 515元 / 折扣价： 438 元 加购物车

This specification covers two types of cool-application compounds used for filling the air spaces in telecommunications wires and cables (both electrical and fiber optic) for the purpose of preventing water and other undesirable fluids from entering or migrating through the cable structure. Type I are general-purpose filling compounds including all materials to be used for filling cables that are not required to function under electrical stress (for example, all-dielectric fiber-optic cable), including filling compounds for fiber-optic loose buffer tubes. While, Type II are electrical-type filling compounds including materials having prescribed electrical properties and used for filling wires and cables that are required to function fully or partially under electrical stress (including hybrid fiber-optic cable). Though chemical composition is not specified, the filling compounds shall, however, be tested and conform accordingly to the following electrical, physical, and temperature characteristics, as agreed upon between producer and purchaser: dissipation factor; volume resistivity; corrosion inhibition; adhesion; flash point; high-temperature drip/oil separation (syneresis) in the raw material state; evaporation loss; water resistance; homogeneity; color and opacity; color stability; foreign materials; volatility; thermal oxidative stability; cone penetration; pour point; drop-melting point; viscosity; congealing point; drop point; cable drip-out temperature; and cold-bend low-temperature flexibility.1.1 This specification covers a variety of compounds used for filling the air spaces in telecommunications wires and cables (both electrical and fiber optic) for the purpose of preventing water and other undesirable fluids from entering or migrating through the cable structure. (For related standards see Specifications D4730 and D4731.)1.2 A cool-application compound is a material that has sufficiently low viscosity that it does not require heating.1.3 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard.1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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5.1 In situations in which the coordination of EMSS communications among political subdivisions affects the health and safety of the state’s population, it is appropriate for state government to take a coordinating role. Statewide planning for coordinated use of radio frequencies for EMSS communications is specifically needed.5.2 The state is the logical unit to formulate the statutory and regulatory framework for EMSS planning. State planning for area-wide EMSS communications provides authority to accomplish coordination in the use of available radio frequencies, thus promoting multiagency cooperation to best serve the public needs.5.3 With statewide planning, communities, counties, and multicounty EMSS regions are provided with guidance to achieve the performance goals and objectives of their EMSS communications systems.5.4 The statewide EMSS communications performance goals and objectives in Sections 10 – 15 address specific roles of state governments in EMSS communications systems planning. These performance goals and objectives should be considered by states for evaluating, planning, and implementing of acceptable EMSS communications statewide.1.1 This guide covers telecommunications practices and performance standards required to support all of the functions of community EMSS on a statewide basis. It defines state planning goals and objectives for EMSS communications.1.2 This guide is for planning, coordinating, integrating, and evaluating telecommunications resources statewide to satisfy the functional needs of comprehensive community EMSS systems.1.3 To facilitate a two-tiered planning approach recommended for EMSS communications, this guide identifies those communications system features that should be coordinated on a statewide basis and defined in statewide (first tier) EMSS communications planning guidelines. Local (second tier) EMSS communications plans prepared in accordance with the statewide guidelines should then be tailored to satisfy local EMSS needs while providing compatibility and interoperability of communications with other EMSS.1.4 The sections in this guide appear in the following sequence:  Section  1Referenced Documents 2Terminology 3Summary of Guide 4 5Functions and Categories of EMSS Communications 6 Telecommunications Functions 6.1 Telecommunications Categories 6.2EMSS Functional Communications Requirements 7 General Information 7.1 Citizen Access 7.2 EMSS Vehicle Dispatch and Coordination 7.3 Medical Coordination/Direction 7.4 Interservice Communications 7.5Radio Frequency Spectrum and Service Requirements 8 Radio Frequencies 8.1 EMSS Radio Service Coverage 8.2 Operational Considerations 8.3Goals and Objectives for EMSS Communications 9Goal 1—State EMSS Communication Should Meet Recognized Standards for Functional Performance 10Goal 2—Local EMSS Communications Should Be Compatible with, and Should Not Interfere with, EMSS Communications in Neighboring Area 11Goal 3—Local EMSS Communications Systems Should Be Compatible with, and Should Not Interfere with, Other Types of Communications Systems 12Goal 4—EMSS Communications Systems Should Make Maximum Use of State and Common Resources Where Appropriate, Cost Effective, and Authorized 13Goal 5—The State Should Act as the Representative of Local EMSS in Dealing with Federal Agencies and National Organizations 14Goal 6—The State Should Have a Program for Positive Management of Its EMSS Communications Activities 15Emergency Medical Radio Services (EMRS) Radio Frequencies (MHz) Appendix X1Acronyms and Glossary for EMSS Communications Appendix X2References  1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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5.1 Dimensional measurements, properly interpreted, provide information with regard to the conductors, insulation, or jacket. The dimensional measurements provide data for research and development, engineering design, quality control, and acceptance or rejection under specifications.1.1 These test methods cover procedures for the physical testing of thermoplastic insulations and jackets used on telecommunications wire and cable and the testing of physical characteristics and environmental performance properties of completed products. To determine the procedure to be used on the particular insulation or jacket or on the completed wire or cable, make reference to the specification for that product.1.2 These test methods appear in the following sections of this standard:Test Method Section(s)Dimensional Measurements of Insulations, Jackets, Miscellaneous   Cable Components, and of Completed Cable 4 – 9     Cross-sectional Areas 9     Diameters 6     Eccentricity 8     Thickness 7Physical and Environmental Tests of Insulation and Jackets 10 – 25     Aging Test (Jackets Only) 24     Cold Bend (Insulation Only) 16     Environmental Stress Crack (Polyolefin Jackets Only) 21     Heat Distortion (Jackets Only) 22     Heat Shock (Jackets Only) 23     Insulation Adhesion 19     Insulation and Jacket Shrinkback (Oven Test) 14     Insulation Compression 20     Insulation Shrinkback (Solder Test) 15     Melt Flow Rate Change—Polyolefin Materials 12     Oil Immersion Test (Jackets Only) 25     Oxygen Induction Time (Polyolefin Insulation Only) 17     Oxygen Induction Time (Cable Filling Compound Only) 18     Tensile and Elongation Tests 13Physical and Environmental Tests of Insulations and Jackets of   Completed Wire and Cable 26 – 42     Cable Torsion Test 38     Compound Flow Test (Filled Core Wire and Cable Only) 42     Corrugation Extensibility Test 36     Cable Impact Test 33     Jacket Bonding Tests 29     Jacket Notch Test 32     Jacket Peel or Pull 28     Jacket Slip Strength Test 30Procedure Section(s)     Pressure Test (Air Core Wire and Cable Only) 40     Sheath Adherence Test 31     Water Penetration Test (Filled Core Wire and Cable Only) 41     Wire and Cable Bending Test 34     Wire breaking strength 371.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard, except where only SI units are given.1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For specific warning statement see 19.1.1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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6.1 Electrical tests, properly interpreted, provide information with regard to the electrical properties of the insulation. The electrical test values give an indication as to how the insulation will perform under conditions similar to those observed in the tests. Electrical tests provide data for research and development, engineering design, quality control, and acceptance or rejection under specifications.1.1 These test methods cover procedures for electrical testing of thermoplastic insulations and jackets used on telecommunications wire and cable and for the testing of electrical characteristics of completed products. To determine the procedure to be used on the particular insulation or jacket compound, or on the end product, reference should be made to the specification for the product.1.2 These test methods appear in the following sections of this standard:Test Method SectionsElectrical Tests of Insulation—In-process 5 – 9     DC proof test 9     Insulation Defect or Fault Rate 8     Spark Test 7Electrical Tests of Completed Wire and Cable 10 – 52     Attenuation 25     Attenuation, Effects Due to Aging 32     Attenuation, Effects Due to Elevated Temperature 30     Attenuation, Effects Due to Humidity 31     Attenuation to Crosstalk Ratio—Far End (ACR-F) 29     Attenuation to Crosstalk Ratio—Near End (ACR-N) 27     Capacitance Deviation 20     Capacitance Difference 21     Capacitance Unbalance, Pair-to-ground (CUPG) 23     Capacitance Unbalance, Pair-to-pair (CUPP) 22     Capacitance Unbalance, Pair-to-support Wire 24     Characteristic Impedance—Test Method 1: Propagation Constant and Capacitance 48     Characteristic Impedance—Test Method 2: Single-ended Measurements 49     Characteristic Impedance—Test Method 3: Least Squares Function Fit 50     Coaxial Capacitance (Capacitance to Water) 18     Conductor Continuity 12     Conductor Resistance (CR) 14     Conductor Resistance Unbalance (CRU of Pairs) 16     Continuity of Other Metallic Elements 13     Crosses Test (Continuity Between Wires of Different Pairs) 36     Crosstalk Loss, Far-end 28     Crosstalk Loss, Near-end 26     DC Proof Test, Core-to-internal Shield (Screen) 41     DC Proof Test, Core-to-shield 39     DC Proof Test, Core-to-support Wire 40     DC Proof Test, Internal Shield (Screen)-to-shield 42     DC Proof Test, Other Required Isolations 43     DC Proof Test, Wire-to-wire 38     Fault Rate Test (Air Core Only) 34     Insulation Resistance (IR) 33     Jacket Voltage Breakdown Rating Test 37     Mutual Capacitance (CM) 19     Mutual Conductance 17     Phase Constant 45     Phase Delay 46     Phase Velocity 47     Resistance of Other Metallic Cable Elements 15     Shorts Test (Continuity Between Wires of a Pair) 35     Structural Return Loss and Return Loss 51     Unbalance Attenuation (Conversion Losses) 52     Voltage Surge Test 441.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Specific hazard statements are given in Sections 7 and 38.1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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This specification describes a medium access control (MAC) and physical layer (PHY) specification for wireless connectivity using dedicated short-range communications (DSRC) services. This standard is based on and refers to IEEE Standards 802.11, Wireless LAN Medium Access Control and Physical Layer Specifications, and 802.11a, Wireless LAN Medium Access Control and Physical Layer Specifications High-Speed Physical Layer in the 5 GHz Band, with permission from the IEEE society. This specification is meant to be an extension of IEEE 802.11 technology into the high-speed vehicle environment. The difference between IEEE 802.11 and IEEE 802.11a operating parameters required to implement a mostly high-speed data transfer service in the 5.9-GHz Intelligent Transportation Systems Radio Service (ITS-RS) Band is explained. Potential operations within the Unlicensed National Information Infrastructure (UNII) Band are also addressed, as appropriate.1.1 This specification2 describes a medium access control (MAC) and physical layer (PHY) specification for wireless connectivity using dedicated short-range communications (DSRC) services. This standard is based on and refers to IEEE Standards 802.11, “Wireless LAN Medium Access Control and Physical Layer Specifications,” and 802.11a, “Wireless LAN Medium Access Control and Physical Layer Specifications High-Speed Physical Layer in the 5 GHz Band,” with permission from the IEEE Society. This specification is meant to be an extension of IEEE 802.11 technology into the high-speed vehicle environment. As presented here, this specification contains just enough information to explain the difference between IEEE 802.11 and IEEE 802.11a operating parameters required to implement a mostly high-speed data transfer service in the 5.9-GHz Intelligent Transportation Systems Radio Service (ITS-RS) band. Potential operations within the Unlicensed National Information Infrastructure (UNII) band are also addressed, as appropriate.1.2 Purpose—The purpose of this specification is to provide wireless communications over short distances between information sources and transactions stations on the roadside and mobile radio units, between mobile units, and between portable units and mobile units. The communications generally occur over line-of-sight distances of less than 1000 m between roadside units and mostly high-speed, but occasionally stopped and slow-moving, vehicles or between high-speed vehicles. This specification also offers regulatory bodies a means of standardizing access to the 5.9-GHz frequency band for the purpose of interoperable communications to and between vehicles at line-of-sight distances on the roadway.1.3 Specifically, this specification accomplishes the following:1.3.1 Describes the functions and services required by a DSRC and IEEE 802.11-compliant device to operate in a high-speed mobile environment.1.3.2 Refers to IEEE 802.11 MAC procedures.1.3.3 Defines the 5.9-GHz DSRC signaling technique and interface functions that are controlled by the IEEE 802.11 MAC.1.3.4 Permits the operation of a DSRC-conformant device within a DSRC communications zone that may coexist with multiple overlapping DSRC communication zones.1.3.5 Describes the requirements and procedures to provide privacy of user information being transferred over the wireless medium and authentication of the DSRC or IEEE 802.11-conformant devices.1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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