Telephonic communications – Multi-line or key substation system with selective switching... – With special service
Reexamination Certificate
2005-03-01
2005-03-01
Cumming, William (Department: 2683)
Telephonic communications
Multi-line or key substation system with selective switching...
With special service
C348S014010
Reexamination Certificate
active
06862349
ABSTRACT:
A hybrid coaxial cable network employing interdiction to ensure privacy in telephony communications. The video and telephony signals are secured such that telephony and interactive video signals to and from a subscriber do not appear on the network at any other undesired subscriber location.
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Brooks & Kushman P.C.
Cumming William
MediaOne Group Inc.
U S West, Inc.
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