Method and means for interrogation of digital repeatered lines

Details Method and means for interrogation of digital repeatered lines Method and means for interrogation of digital repeatered lines

H - Electricity

04

B

340/73

H04B 3/36 (2006.01) H04B 3/46 (2006.01) H04B 17/02 (2006.01)

Patent

CA 1037383

ABSTRACT OF THE DISCLOSURE A circuit arrangement for interrogation of digital repeatered transmission lines wherein testing stations are provided in the form of interrogation circuits each having a unique digital address serviced by a fault line adapted to transmit signals containing such digital addresses. In an exemplary embodiment, a testing station is provided at each repeater station so that the regenerators in the repeaters may be individually tested from a central station. For responding to the assigned address each testing station includes a coincidence detector. Upon detection of a coincidence, the test response of the regenerator is coupled to the fault line for return to the central office. Means are provided at each testing station to modulate the returned signal with the assigned digital address, thereby verifying the source of the test response. The verification feature provides an additional operating mode incorporating self-interrogation for report-back of line failure locations.

227944

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