Telephonic communications – Substation or terminal circuitry
Reexamination Certificate
2006-06-06
2006-06-06
Tran, Sinh (Department: 2646)
Telephonic communications
Substation or terminal circuitry
C379S344000, C375S257000, C375S211000
Reexamination Certificate
active
07058172
ABSTRACT:
A bidirectional long distance driver for Ethernet, named Ethernet Booster, is disclosed that comprises a forward transmission circuit and a backward transmission circuit, wherein each of the circuits includes Ethernet interface socket RJ45, an impedance matching circuit, power amplifying circuit and frequency compensation circuit. The booster is characterized in that the differential signals received from the Ethernet interface socket RJ45 in the forward/backward transmission circuits are sent to twisted-pair lines through the first impedance matching circuit, power amplifying circuit, the frequency compensation circuit and the second impedance matching circuit in turn. The advantage of the driver is that the booster can greatly enhance the transmission power of 10BASE-T by lengthening network segment distance to 350–500 m, and can decrease the cost greatly by dispensing with in-building switches and making full use of the resources of switches without any or with very few switch ports being wasted. The driver can be used in broadband network applications where long distance driving of 10 base-T Ethernet signals is needed.
REFERENCES:
patent: 2002/0075962 (2002-06-01), Davis
patent: 2002/0106013 (2002-08-01), Norrell et al.
Jiang Hanmin
Jiang Zemin
Briney III Walter F
Thorpe North & Western LLP
Tran Sinh
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