该欧洲标准规定了使用隧道机制（其中CNP分组被封装在IP分组内）的用于通过因特网协议（IP）网络的商业楼宇自动化，控制和楼宇管理的控制网络协议（CNP）分组的传送。它适用于CNP节点和CNP路由器。 本欧洲标准的目的是确保希望使用IP网络与CNP协议进行通信的各种CNP设备之间的互操作性。 该欧洲标准的主体与通过IP网络传输的CNP协议无关。读者针对附件A和附件B，分别针对EN 14908-1特有的本规范的规范和内容。 图1显示了连接到IP网络的CNP设备和网络的可能配置。 图1描述了两种类型的CNP设备:CNP节点和CNP路由器。应该注意的是，所示的路由器可以在典型的CNP信道（例如双绞线或电力线）和IP信道之间路由分组，或者可以在两个IP信道之间路由CNP分组。在这个欧洲标准中，IP通道将被定义为允许它像任何其他CNP频道一样使用。 在上图中，IP网络

This European Standard specifies the transporting of the Control Network Protocol (CNP) packets for commercial Building Automation, Controls and Building Management over Internet Protocol (IP) networks using a tunnelling mechanism wherein the CNP packets are encapsulated within IP packets. It applies to both CNP nodes and CNP routers. The purpose of this European Standard is to ensure interoperability between various CNP devices that wish to use IP networks to communicate using the CNP protocol. The main body of this European Standard is independent of the CNP protocol being transported over the IP network. The reader is directed to Annex A and Annex B for the normative and informative, respectively, aspects of this specification that are specific to EN 14908-1. Figure 1 shows a possible configuration of such CNP devices and networks connected to an IP network. Figure 1 depicts two types of CNP devices: CNP nodes and CNP routers. It should be noted that the routers shown can route packets between typical CNP channels (such as twisted pair or power line) and an IP channel or it can route CNP packets between two IP channels. In this European Standard the IP channel will be defined in such a way to allow it to be used like any other CNP channel. In the above diagram, the IP network can be considered to be one or more IP channels. This European Standard covers only how CNP packets are transported over IP channels. It does not cover how CNP packets are routed between standard CNP channels and IP channels. This specification is not intended to cover the lower layers (physical, MAC and link layers) of either standard CNP or IP channels.