All Axis video encoders connect to analog pan/tilt/zoom (PTZ) cameras to allow for easy operation of these PTZ cameras across the IP network. Axis' open policy ensures simple and fast integration with most analog PTZ cameras on the market by including software drivers for more than 25 different analog cameras, including products from American Dynamics, Bosch, Canon, Panasonic, Pelco, Philips, Samsung, Sensormatic and Sony. It is also possible to control daisy-chained cameras from one RS-485/RS-422 serial port as long as they operate on the same protocol.