Fault location operating system with loopback

摘要: A fault-location operating system for use with transmission networks using repeaters loopback capabilities. plurality of bidirectional links Li, i=1 through N, are used data between the terminals. test control unit is connected at first terminal to end link L1, and controls signals across L1. Ri, N-1, interconnecting links. Each repeater Ri one Li second another Li+1. includes a circuit repeating transmitted from on other Li+1, Li+1 Li. In addition, included in each that responsive looping back this system, has capability sent The can be provided elements network so single located faults anywhere within network.