信息技术 系统间远程通信和信息交换 专用综合业务网 静态电路方式-PINX间连接的功能要求

[中文适用范围]： 该国际标准是专用综合业务网络（PISN）功能要求的一部分，定义了专用综合业务网络交换机（PINX）和中间网络（IVN）所需的功能和程序，以建立互连网。 PINX 连接 (IPC)。 IPC 用于在 PINX 之间传输信令和用户信息。 ISO/IEC 11572 和 11574 中定义的专用信令系统 No.1 (PSS1) 定义了 Q 参考点处 PINX 之间的呼叫控制的信令过程和协议。 这些过程独立于 IVN 的类型，称为用于互连 PINX 的场景。 ISO/IEC TR14475 描述了提供 PINX 互连的各种类型 IVN 的使用。 为了将一个 PINX 连接到另一个 PINX，需要映射函数来使 C 参考点处的特定接口适应 Q 参考点处的应用程序。 因此，映射函数提供对 C 参考点处的接口的物理适应。 映射功能还提供将Q参考点处的用户信道和信令信息映射到C参考点处的适当信道或时隙。 C 和 Q 参考点在 ISO/IEC 11579-1 中定义。 本国际标准涵盖的 C 参考点接口类型为： [1] 1544 kbit/s 非结构化数字专线 [2] 1544 kbit/s 结构化数字专线 [3] 2048 kbit/s 非结构化数字专线 [ 4] 2048 kbit/s 结构化数字专线 [5] 64 kbit/s 无限制数字专线 [6] 1544 kbit/s ISDN 主速率用户网络层 1 接口 [7] 2048 kbit/s ISDN 主速率用户网络第 1 层接口 [8] ISDN 基本速率用户网络第 1 层接口 在 Q 参考点，映射为用户通道提供 64 kbit/s 服务，为信令通道提供分组模式服务。 所应用的映射是静态映射，即Q参考点处的用户和信令信道与C参考点处的接口时隙之间存在固定的关系。 任何变更均需采取行政措施。 本国际标准规定了 IVN 的 Q 参考点和 C 参考点之间的 PINX 映射函数，这些 IVN 提供专用或半永久性、非用户激活、电路模式 IPC。 专用 IPC 是永久建立的连接，通常在合同期内持续建立。 半永久IPC是指在合同期内，资源被保留指定时间的连接。 半永久IPC是通过管理控制建立的，有或没有用户激活。 在本国际标准中，由管理控制和用户激活建立的半永久性IPC不属于范围。 IVN可以是专用物理链路、专用传输系统或交叉连接系统、或半永久连接系统。 只要IVN支持上面列出的接口之一，包括逆复用器技术（例如，根据ISO/IEC 13871的信道聚合）的IVN就被本国际标准涵盖。 本国际标准还规定了地图信息。 在 PINX 的两侧，需要映射信息来管理场景。 本国际标准适用于可以互连形成专用综合服务网络（PISN）并支持 Q 参考点信令协议的 PINX。 [外文原描述]： This International Standard is a part of the functional requirements for the Private Integrated Services Network (PISN) and defines the functions and procedures that are required by Private Integrated Services Network exchanges (PINXs) and the intervening network (IVN) in order to establish Inter-PINX Connections (IPC). The IPC is used for the transfer of signalling and user information between PINXs. The Private Signalling System No.1 (PSS1) as defined in ISO/IEC 11572 and 11574 defines the signalling procedures and protocol for call control between PINXs at the Q reference point. These procedures are independent of the types of IVNs, called scenarios used to interconnect the PINXs. ISO/IEC TR14475 describes the use of various types of IVNs which provide the interconnections of PINXs. In order to connect a PINX to another PINX, mapping functions are required to adapt the specific interfaces at the C reference point to the application at the Q reference point. As such, mapping functions provide for physical adaptation to the interface at the C reference point. Mapping functions also provide for the mapping of user channels and signalling information at the Q reference point to the appropriate channels or time-slots at the C reference point. The C and Q reference points are defined in ISO/IEC 11579-1. The types of interfaces at the C reference point covered by this International Standard are: [1] 1544 kbit/s unstructured digital leased line [2] 1544 kbit/s structured digital leased line [3] 2048 kbit/s unstructured digital leased line [4] 2048 kbit/s structured digital leased line [5] 64 kbit/s unrestricted digital leased line [6] 1544 kbit/s ISDN Primary Rate user-network layer 1 interface [7] 2048 kbit/s ISDN Primary Rate user-network layer 1 interface [8] ISDN Basic Rate user-network layer 1 interface At the Q reference point the mappings provide a 64 kbit/s service for user channels and a packet mode service for the signalling channel. The applied mapping is a static mapping, i.e. there is a fixed relationship between user and signalling channels at the Q reference point and the timeslots of the interface at the C reference point. Any changes are subject to administrative actions. This International Standard specifies PINX mapping functions between the Q reference point and the C reference point for IVNs which provide either dedicated or semi-permanent, non-user activation, circuit-mode IPCs. The dedicated IPC is the connection permanently established, usually for the duration of a contractual period. The semi-permanent IPC is the connection whose resources are reserved for specified times during a contractual period. The semi-permanent IPC is established by management control with or without user activations. In this International Standard, the semi-permanent IPC established by management control with user activation is outside the scope. The IVN can be a dedicated physical link, dedicated transmission system or a cross connect system, or semi-permanent connection system. IVNs which include inverse mulitlexer techniques (e.g. channel aggregation in accordance with ISO/IEC 13871) are covered by this International Standard so far as they support one of the interfaces listed above. This International Standard also specifies mapping information. At both sides of the PINX, mapping information is required to administer the scenarios. This International Standard is applicable to PINXs which can be interconnected to form a Private Integrated Services Network (PISN) and which support signalling protocols at the Q reference point.