Geovision Dvr card: do you need a gv net card

[antdickens 0]

For controlling PTZ cameras do you need top use a GV net card or can you use a rs232 / 485 converter on the com port??

[C7Installer 0]

Either will work. Geovision also makes a GV-Net box that connects to your external serial port, as well as an internal RS485 card. I like the card better because it makes the DVR an "all-in-one" box.