VERACITY HIGHWIRE Powerstar Base 4 LINKLOCK provides a tamper-proof secure barrier for your IP cameras and devices connected over coax cable, to prevent unauthorised access to your network. LINKLOCK devices detect any disconnection/reconnection or tampering with any part of the cabling between the Base unit and the IP camera or other POE device. 4 tamper-proof camera channels per Base unit. (8 channel base unit also available.) Automatic configuration for simple installation. Full duplex 100Base-TX performance on each coax. 5 year warranty.