System and method for preventing phantom data communication...

Details System and method for preventing phantom data communication... System and method for preventing phantom data communication...

2006-09-12

2006-09-12

Pham, Chi (Department: 2616)

Multiplex communications

Phantom

C370S201000, C370S461000, C375S227000

Reexamination Certificate

active

07106688

ABSTRACT:
A data communication system is provided that comprises a head-end switching system which comprises a plurality of communication ports. A port controller causes the ports to sequentially issue inquiry signals to network termination points. This sequential processing of inquiry signals prevents the formation of phantom links that may occur if physical conductors which are susceptible to crosstalk interference with connected conductors erroneously convey a response signal back to an unattached port within the head-in switching system.

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