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定价: 605元 / 折扣价: 515 加购物车

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ISO/IEC 18092, ISO/IEC 14443 and ISO/IEC 15693 specify the radio frequency signal interface, initialization, anti-collision and protocols for wireless interconnection of closely coupled devices and access to contactless integrated circuit cards operating at 13,56 MHz. This Standard specifies the communication mode selection mechanism, designed not to disturb any ongoing communication at 13,56 MHz, for devices implementing ISO/IEC 18092, ISO/IEC 14443 or ISO/IEC 15693. This Standard requires implementations to enter the selected communication mode as specified in the respective Standard. The communication mode specifications, however, are outside the scope of this Standard.

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定价: 689元 / 折扣价: 586 加购物车

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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.

定价: 515元 / 折扣价: 438 加购物车

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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 加购物车

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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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This Standard specifies the Services and Event Reports for Computer-Supported Telecommunications Applications, Phase III (CSTA).

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