本国际标准规定了8触点连接器（插头和插孔）及其触点的分配 综合业务数字网（ISDN）主要速率接入的物理接口中使用的数字 符合ITU-T建议I.431的服务。 在本国际标准中，与ITU-T建议I.431一样，术语“NT”用于表示网络 端接NT1和NT2的第1层方面，术语“TE”用于表示NT1和NT2的第1层方面 TE1、TA和NT2。 笔记 1本国际标准仅规定了确保插头和连接器可相互配合所需的连接器尺寸 杰克。连接器的完整详细规范见IEC 603-7，见附录C。 2 ITU-T认可本国际标准未涵盖的替代连接系统。它使用 IEC 169-8（见附录C）中规定的同轴连接器，如附录B所示。

This International Standard specifies the 8-contact connector (plug and jack) and the assignments of its contact numbers for use in the physical interfaces of Integrated Services Digital Network (ISDN) primary rate access services conforming to ITU-T Recommendation I.431. In this International Standard, as in ITU-T Recommendation I.431, the term "NT" is used to indicate the network terminating layer 1 aspects of NT1s and NT2s, and the term "TE" is used to indicate terminal layer 1 aspects of TE1s, TAs and NT2s. NOTES 1 This International Standard specifies only those connector dimensions required to ensure intermatability of plug and jack. Complete detailed specifications of the connector are the subject of IEC 603-7, see annex C. 2 ITU-T recognizes an alternative connection system which is not covered by this International Standard. It uses coaxial connectors as specified in IEC 169-8 (see annex C), and is illustrated in annex B.