本国际标准是专用综合业务网（PISN）功能要求的一部分 定义了专用综合业务网络交换机（PINXs）所需的功能和程序 以及干预网络（IVN），以建立PINX间连接（IPC）。IPC用于传输 PINX之间的信令和用户信息。 ISO/IEC 11572和11574中定义的1号专用信号系统（PSS1）定义了信号程序 以及Q参考点PINX之间的呼叫控制协议。这些程序独立于设备类型 IVN，称为用于连接PINX的场景。 ISO/IEC TR14475描述了各种类型IVN的使用 提供PINx的互连。 为了将一个PINX连接到另一个PINX，需要使用映射函数来调整C端的特定接口 Q参考点处应用程序的参考点。因此，映射功能提供了物理适应 到C参考点处的接口。映射功能还提供用户通道和 将Q参考点处的信息发送到C参考点处的适当信道或时隙。C ISO/IEC 11579-1中定义了Q和Q参考点。 本国际标准涵盖的C参考点处的接口类型包括: [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] 64kbit/s无限制数字专线 [6] 1544 kbit/s ISDN主速率用户网络第1层接口 [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，为用户通道提供分组模式服务 信号通道。应用的映射是静态映射，即用户和用户之间存在固定的关系 Q参考点的信令信道和C参考点的接口时隙。 任何变化都是 受到行政处分。 本国际标准规定了Q参考点和C参考点之间的PINX映射函数 对于提供专用或半永久、非用户激活、电路模式IPC的IVN。专用IPC 这种联系是永久建立的，通常在合同期限内。半永久性IPC是 一种连接，其资源在合同期限内保留指定的时间。半永久性IPC是 由管理控制建立，无论是否有用户激活。在本国际标准中，半永久性 由管理控制和用户激活建立的IPC不在范围内。 IVN可以是专用物理链路、专用传输系统或交叉连接系统，也可以是半永久性的 连接系统。IVN，包括反向多功能技术（例如，根据 ISO/IEC 13871）包含在本国际标准中，只要它们支持上述接口之一。 本国际标准还规定了地图信息。在PINX的两侧，映射信息是 需要管理场景。 本国际标准适用于PINX，PINX可以相互连接，形成专用的综合业务 网络（PISN），并支持Q参考点的信令协议。

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.