私有通信网络是指由一个或多个组织或个人拥有和控制的通信网络，用于实现特定的通信需求。数字信道聚合是指将多个数字信道合并成一个更高带宽的信道，以提高通信网络的传输能力和效率。数字信道聚合技术已经广泛应用于各种通信网络中，包括私有通信网络、公共通信网络和互联网等。

ISO/IEC 13871:1995标准规定了数字信道聚合的基本概念、术语和定义，以及数字信道聚合的技术要求和测试方法。该标准主要包括以下内容：

1.数字信道聚合的基本概念和术语：该部分介绍了数字信道聚合的基本概念和术语，包括数字信道、数字信道聚合、聚合组、聚合器、聚合器组等。

2.数字信道聚合的技术要求：该部分规定了数字信道聚合的技术要求，包括聚合组的配置、聚合器的选择、聚合器组的管理、聚合组的控制等。

3.数字信道聚合的测试方法：该部分介绍了数字信道聚合的测试方法，包括聚合组的性能测试、聚合器的性能测试、聚合器组的性能测试等。

该标准的实施可以提高私有通信网络的传输能力和效率，降低通信成本，提高通信质量和可靠性。同时，该标准也为数字信道聚合技术的应用提供了技术支持和标准化的基础。

相关标准
ISO/IEC 13872:1995 Information technology — Telecommunications and information exchange between systems — Private telecommunications networks — Digital circuit multiplication equipment (DCME)
ISO/IEC 13873-1:1998 Information technology — Telecommunications and information exchange between systems — Private Integrated Services Network — Specification, functional models and information flows — Call control protocol: Protocol specification
ISO/IEC 13873-2:1998 Information technology — Telecommunications and information exchange between systems — Private Integrated Services Network — Specification, functional models and information flows — Call control protocol: Protocol implementation conformance statement (PICS) proforma
ISO/IEC 13874:1995 Information technology — Telecommunications and information exchange between systems — Private telecommunications networks — Inter-exchange signalling protocol — Circuit-mode 64 kbit/s inter-exchange signalling protocol for access to packet-mode public data networks through an ISDN
ISO/IEC 13875:1995 Information technology — Telecommunications and information exchange between systems — Private telecommunications networks — Inter-exchange signalling protocol — Circuit-mode 64 kbit/s inter-exchange signalling protocol for access to packet-mode public data networks through a PDN gateway