The document discusses Telindus (Cellstack) Video Surveillance systems which use modular encoder and decoder cards on shelves to connect up to 54 cameras. The systems can use MJPEG or MPEG2 encoding and decode video transmitted over ATM or Gigabit Ethernet networks with typical delays of 60-200ms. They support features like multicasting, serial control of devices, audio transmission with various formats and sampling rates, and can be managed by the CellStack Manager software. Examples of major installations listed include airports, highways, transit systems, oil rigs, and subway systems around the world transmitting surveillance video over network infrastructures.