Which of the following is not described as part of the accessory range for network video?

The focus on the accessory range for network video typically includes items that enhance the functionality and usability of the video surveillance system. Basic camera controls, enhanced visibility equipment, and additional security measures are all components that can improve the overall performance of a network video setup.

Basic camera controls provide users with the capability to adjust and manage camera settings for optimal performance. Enhanced visibility equipment, such as lighting or infrared systems, allows cameras to capture clearer images in challenging conditions, like low light. Additional security measures might include features like encryption or advanced authentication methods to ensure the integrity and protection of video footage.

Delay systems, however, are not typically considered a standard part of the accessory range for network video. They may involve additional complexity or technology not inherently aligned with the primary function of recording and streaming video. Therefore, this is the correct option as it does not fit into the expected accessories that enhance or complement the network video environment.