| 单词 | CT1 (Cordless Telephony generation 1) |
| 释义 | CT1 (Cordless Telephony generation 1) An early standard for analog cordless telephony developed by the European Conference of Postal and Telecommunications Administrations (CEPT) in Europe, where it was known as CEPT-1. CT1 operates in the 915 MHz and 960 MHz bands over 40 paired channels 25 kHz wide and employs frequency modulation (FM). Frequency division multiple access (FDMA) and frequency division duplex (FDD) are used to derive two separate channels, one downstream and one upstream, each of which is 12.5 kHz wide. CT1 is limited in range to approximately 150 meters. A variation on this standard is CT0, which was primarily used in the United Kingdom. See also analog, CEPT, channel, cordless telephone, CT0, downstream, FDD, FDMA, FM, and upstream. |
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