Voltcraft ct 5 cable network service kit voltcraft ct 5 p the voltcraft ct 5 is a network installation and service set for lan home network isdn and broadband p p the set is compiled specifically for the professional networking service tools and a cable tester with rj 11 rj 45 ieee 1394 firewire and usb test socket are included continuity interruption short circuit ground and termination and crossed wires are all displayed using the easy to read indicator lights p voltcraft