| 单词 | TDD |
| 释义 | TDD 1. Time-Division Duplex. A means of providing bidirectional communications in digital wireless networks, such as cellular networks.TDD typically is used in conjunction with frequency-division duplex (FDD), with the forward and backward time division multiplexed (TDM) channels riding over separate frequency channels. Further, the time slots are staggered so the frequency-specific transceivers are not asked to transmit and receive at the same exact moments in time. See also cellular, digital, FDD, TDM, time slot, and transceiver. 2. Telecommunications Device for the Deaf. In the United States, a printing telegraph service widely used by those with hearing or speech impairments. Also generically known as TTY (TeleTYpewriter), textphone in Europe, and minicom in the United Kingdom. TDDs use the Baudot code, also known as International Telegraph Alphabet #2 (ITA #2). See also Baudot code, telegraph, and teletype. |
| 随便看 |
|
科学参考收录了5291条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。