Spare card connection circuitry for high-speed telecommunication

Details Spare card connection circuitry for high-speed telecommunication Spare card connection circuitry for high-speed telecommunication

1992-04-10

1994-06-14

Yusko, Donald J.

Communications: electrical

Continuously variable indicating

With meter reading

34082503, 370 16, 371 81, H04L 1250, H04J 1500, G06F 1120

Patent

active

053213947

ABSTRACT:
High speed telecommunications interface circuitry (10) receives a plurality of incoming telecommunication channels (11), and includes a plurality of working receivers (88) each having an input (83-85) connected to a respective one of the incoming channels (11) . A switching circuit (21) has a plurality of working circuit ports (112-116) each connected to an input (83-85) of a respective one of the working receivers (88). The switching circuit has a spare circuit port (33), and is operable to create a data path between the selected one of the working circuit ports (112-116) and the spare circuit port (33). A spare receiver (88) has an input (128) connected to the spare circuit port (33) of the switching circuit (21). Preferably, a switch card (21) of the switching circuit also includes a plurality of series-connected switches (254-268) which are operable to create a single switching path from a selected one of a plurality of working circuit output ports on the switch card (21) to a spare circuit port (36).

REFERENCES:
patent: 3694775 (1972-09-01), Rogers
patent: 4451708 (1984-05-01), Kemler et al.
patent: 4517572 (1985-05-01), Dixon
patent: 4774703 (1988-09-01), Force et al.
patent: 5040170 (1991-08-01), Upp et al.
patent: 5229990 (1993-07-01), Teraslinna

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