发明名称 |
POWER LINE COMMUNICATION EMPLOYING CORDLESS TELEPHONE STANDARD |
摘要 |
Telecommunications signals are carried on a cable (111) which carries mains electricity to a consumers' premises. A signal coupler (SC) and a subscribers' interface unit (SIU) are provided between the mains cable (111) and conventional subscribers' terminal equipment (25A, 25B, 25C) adapted for full duplex communication with a local telephone exchange. The subscribers' interface unit SIU converts telecommunications signals between this duplex form (typically analogue at audio frequencies) and time division duplex (TDD) form at a carrier frequency in the range 1 MHz to 20 MHz for coupling to the mains cable (111). In the example, TDD interface means (40) provides cordless telephony digital standard formatting/deformatting and modulating/demodulating at a carrier in the band 864 MHz to 868 MHz, and a frequency converter (50) converts between this band and, typically, 2 MHz to 6 MHz.
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申请公布号 |
WO9743836(A1) |
申请公布日期 |
1997.11.20 |
申请号 |
WO1997GB01340 |
申请日期 |
1997.05.16 |
申请人 |
NORTHERN TELECOM LIMITED;FREEMAN, BENEDICT, RUSSELL |
发明人 |
FREEMAN, BENEDICT, RUSSELL |
分类号 |
H04B3/54;(IPC1-7):H04B3/54 |
主分类号 |
H04B3/54 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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