Communication network cut-off detection arrangement

Details Communication network cut-off detection arrangement Communication network cut-off detection arrangement

H - Electricity

04

L

344/1, 379/2, 34

H04L 1/00 (2006.01) H04L 1/24 (2006.01) H04M 3/32 (2006.01) H04M 3/10 (2006.01)

Patent

CA 2016797

- 12- COMMUNICATION NETWORK CUT-OFF DETECTION ARRANGEMENT Abstract cut-off type malfunctions in a communication network are located by establishing a connection through the network between a first terminal and a second terminal. At the first terminal, a prescribed sequence of first signals is generated and applied to the established network connection. At the second terminal, a second signal is generated responsive to receipt of a first signal over the established connection and the second signal is applied to the established network connection. A signal representing the diffference between the number of first signals applied to the established connection and the number of second signals received from the established connection is formed at the first terminal. The established connection is maintained for testing when the difference signal exceeds a predetermined number.

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