This is an accessory for the GV Series Video Surveillance Cards.
GV-COM is necessary for controlling Pan/Tilt/Zoom cameras when using the surveillance software or remote viewing software for P/T/Z control. It is a device that converts RS-232 to RS-485. To be connected to COM1 or COM2 of your computer.
GV-NET also will allow for longer runs when using the Point-Of-Sale cash register interface.