Telephonic communications – Subscriber line or transmission line interface – Network interface device
Reexamination Certificate
2005-07-12
2005-07-12
Chiang, Jack (Department: 2642)
Telephonic communications
Subscriber line or transmission line interface
Network interface device
Reexamination Certificate
active
06917683
ABSTRACT:
In signal-splitting equipment for multiple subscribers, circuitry is disposed on a signal-splitter card which connects with a back plane providing physical support and electrical connection to other splitter cards and to distant sites, as well as to an interface with a system conducting automatic testing of DSL circuits. Each splitter card also carries a separate relay card with signal-routing relay circuitry, the relay card being affixed by means of a switching connector having bypass circuitry which ensures normal communication of DSL signals and audio signals in the event that a relay card is disconnected from its signal-splitter card. During a testing of the equipment, the system operates the relays of the relay cards of the respective signal-splitter cards for a connection of test equipment to various equipment associated with a specific subscriber.
REFERENCES:
patent: 5724421 (1998-03-01), Tuvy et al.
patent: 6438226 (2002-08-01), Guenther et al.
patent: 6628525 (2003-09-01), Miller et al.
Singaliese Michael
Traut Fred A.
Aker David
Chiang Jack
mPhase Technologies, Inc.
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