REAL TIME FAULT MONITOR FOR LOCAL AREA NETWORKS
Original Publication Date: 1992-May-01
Included in the Prior Art Database: 2002-Jan-04
This invention offers a protocol to monitor faults, in a real-time fashion, within the local area network that supports Smart Repeater truoked systems. By distribut- ing the generation of word frame interrupt synchroniza- tion pulses to all repeaters, sequentially, the repeaters are effectively made to send "I am alive" indications at frequent periodic intervals. When a given repeater fails to generate its WFI signal, the other repeaters are immedi- ately alerted to the fact that something is wrong either with the cabling or the circuitry on that repeater. Such early detection of faults allows the repeater site to take pre-emptive corrective action, and minimizes attempts to transfer messages across broken or disconnected cables or to inactive repeaters.