Telecommunications – Having single-channel telephone carrier – Over power line
Reexamination Certificate
2006-01-10
2006-01-10
Trost, William (Department: 2683)
Telecommunications
Having single-channel telephone carrier
Over power line
C455S552100, C455S426100, C455S445000, C340S315000
Reexamination Certificate
active
06985714
ABSTRACT:
From an electric pole outside to a cordless handset inside a building/facility, a communication line is established via an electric power line. At this point, it is judged whether or not electric power line communication is possible, and if electric power line communication is possible, the communication line between the cordless handset and a base unit is switched to an electric power line communication system, and a communication line is formed via an optical fiber cable from the electric power line. By measuring the communication quality levels of all lines of the wireless and electric power lines, the communication line having the highest communication quality level may be selected.
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Akiyama Keiji
Konya Satoshi
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Rampuria Sharad
Sony Corporation
Trost William
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