Pulse or digital communications – Repeaters – Testing
Patent
1979-10-29
1981-11-17
Swann, III, Glen R.
Pulse or digital communications
Repeaters
Testing
371 48, H04B 1702
Patent
active
043015387
ABSTRACT:
A remote surveillance and fault location unit for installation in each pulse generator repeater in a digital transmission link uses a service signal added to the digital data signal conveyed by the link. Each unit comprises a receiver circuit (100), a time base (200) and a transmitter circuit (300) suitable for implementation as an integrated circuit. The units add data representative of the performance of the repeater at which they are located to the service signal which is then monitored at one end of the link. The remote surveillance and fault location unit comprises a receiver circuit connected to an input to the pulse generator repeater for receiving a service signal if one is present at the input, a carrier frequency and clock bit frequency recovery circuits, a transmission circuit having its output connected to a second input of the pulse regenerator repeater for transmitting a service signal corresponding to the received frame to which data has been added.
REFERENCES:
patent: 3873775 (1975-03-01), Chown
patent: 3898564 (1975-08-01), Waldhauer et al.
patent: 3916379 (1975-10-01), Dulaney et al.
patent: 3987395 (1976-10-01), Desombre et al.
patent: 4211920 (1980-07-01), Wakabayaski
Desombre Patrice
Steun Jean-Pierre
Compagnie Industrielle des Telecommunications Cit-Alcatel
Swann III Glen R.
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