EATON CORPORATION ZB24587 / ZB24587 (BRAND NEW) NETWORK & COMMS PROTECTION, MTL ZONEBARRIER RANGE, MTL ZBS RS485 4 WIRE FULL DUPLEX TS. NOT A LOT I COULD FIND OUT ABOUT THIS DEVICE. VERY EXPENSIVE ON LINE AND IT SHIPS FROM OVERSEAS AND TAKES A MONTH LOOKS LIKE THEY PROTECT VIDEO SYSTEMS
