Equipment shelf-resident network interface unit by-pass circuit

Details Equipment shelf-resident network interface unit by-pass circuit Equipment shelf-resident network interface unit by-pass circuit

2006-09-05

2006-09-05

Eng, George (Department: 2617)

Telecommunications

Transmitter and receiver at same station

Having particular housing or support of a transceiver

C455S067110, C455S090300, C455S115100, C455S226100, C455S423000

Reexamination Certificate

active

07103322

ABSTRACT:
A (DS3) network interface unit (NIU) by-pass architecture places the NIU on its own circuit card and exclusive of by-pass switching (and relay) components, which are installed in the equipment shelf, proper, so that physical removal of the NIU card will leave the by-pass circuitry intact. The by-pass circuit responds to an abnormality of the NIU card, such as malfunction or physical removal of the NIU from its card slot, and also to a power supply failure. It also contains an indicator to draw attention to a failed NIU, increasing the likelihood that someone will notice a damaged card.

REFERENCES:
patent: 4442502 (1984-04-01), Friend et al.
patent: 6052733 (2000-04-01), Mahalingam et al.
patent: 6292379 (2001-09-01), Edevold et al.
patent: 6452924 (2002-09-01), Golden et al.

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