ABSTRACT
The ANSI/CEA-852 standard was created to ensure interoperability of control network (CN) devices, which communicate over an Internet Protocol (IP) network using a native CN protocol. CN/IP router devices bridge the gap between traditional ANSI/CEA-709 networks and IP channels. The process of embedding ANSI/CEA-709 frames in ANSI/CEA-852 data packets is referred to as encapsulating. This chapter summarizes the channel routing (CR) algorithm implemented in most CN/IP router implementations. An important part of ANSI/CEA-852 is the routing of CN packets to the correct CN devices over the IP network. The secure hash function algorithm MD5 is used to create a unique fingerprint of an ANSI/CEA-852 message. Modern installations frequently embed their ANSI/CEA-852 channels in a virtual private network (VPN), which is a widely accepted IT standard today. This method eliminates cumbersome NAT router configuration and provides the enhanced security mechanisms missing in ANSI/CEA-852 such as strong encryption.
