Circuit arrangement for an interference data alarm system in com

Details Circuit arrangement for an interference data alarm system in com Circuit arrangement for an interference data alarm system in com

1978-03-23

1980-02-05

Robinson, Thomas A.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340147SC, G08B 2900, H04M 1100

Patent

active

041874145

ABSTRACT:
Error and condition messages are transmitted from unmanned telecommunication facilities to a central exchange having a maintenance control station. In order to safeguard this interference data alarm system against interferences in the secondary station and in the telephone network, the transmitting test unit is inserted in several lines used for normal telecommunications traffic, said lines leading to the maintenance control station. In order to transmit the messages, any one of these lines can be automatically selected for maintenance purposes by the transmitting test unit, whereupon a connection to the maintenance control station is automatically established and the necessary data sent to such station. A data dialog for error analysis is possible.

REFERENCES:
patent: 3983340 (1976-09-01), Lima et al.
patent: 4076961 (1978-02-01), Holsinger et al.
patent: 4119815 (1978-10-01), Frankfort et al.

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