| 单词 | ETACS (Extended Total Access Communications System) |
| 释义 | ETACS (Extended Total Access Communications System) A version of the TACS 1G analog cel- lular radio technology developed for use in the United Kingdom. ETACS operates in the 900 MHz band, employs frequency modulation (FM), and supports 1,000 channels of 25 kHz. As an analog system,TACS derives channels using frequency division multiple access (FDMA) and bidirectional communications is achieved through frequency division duplex (FDD) with the downlink in the 916–949 MHz band and the uplink in the 871–904 MHz band. See also 1G, analog, cellular radio, downlink, FDD, FDMA, FM, narrowband, TACS, and uplink. |
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