Telephonic communications – Subscriber line or transmission line interface – Hybrid circuit
Reexamination Certificate
2000-11-29
2008-11-04
Singh, Ramnandan (Department: 2614)
Telephonic communications
Subscriber line or transmission line interface
Hybrid circuit
Reexamination Certificate
active
07447307
ABSTRACT:
A method and apparatus provide an IP telephone or similar device with a mechanism to receive and at least briefly loop back discovery signals received from a telecommunications device such as an Ethernet switch while not permitting the loop back of data packet signals. No mechanical relays are required and the circuitry can be fully integrated on an integrated circuit using commonly available techniques, if desired.
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De Nicolo Maurilio Tazio
Karam Roger
Molenda James
Nakamura Karl
Cisco Technology Inc.
Ritchie David B.
Singh Ramnandan
Thelen LLP
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