Fault detection in broadband cable systems

Details Fault detection in broadband cable systems Fault detection in broadband cable systems

1995-12-27

1998-01-27

Kuntz, Curtis

Telephonic communications

Diagnostic testing, malfunction indication, or electrical...

Of trunk or long line

379 1, 379 27, 379 34, 348 6, 348180, 455 61, 370241, H04M 124, H04M 308, H04M 322, H04M 710

Patent

active

057128979

ABSTRACT:
A fault detection system for a broadband network having a central switch for switched telecommunications connections among subscribers each provided with subscriber interface equipment. The subscriber interface equipment has a received voice path and generates baseband signals for voice telephony which are carried at a carrier frequency on the broadband network. The fault detection system is provided with a tone generator for providing a constant, continuous pilot throughout the network. A pilot tone detector at the subscriber interface equipment detects the absence of pilot tone. The central switch is responsive to each pilot tone detection to recognize the absence of pilot tone at the corresponding subscriber location.

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patent: 5331412 (1994-07-01), Farmer et al.
patent: 5585842 (1996-12-01), Chappell et al.
patent: 5635980 (1997-06-01), Lin et al.

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