| 单词 | v.54 |
| 释义 | V.54V.54An ITU standard (1976) for various loopback tests that can be incorporated into analog modems for testing the telephone circuit and isolating transmission problems. Operating modes include local and remote digital loopback and local and remote analog loopback. |
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英语词典包含2567994条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。