同步数位阶层

Traditional (Taiwan): 同步數位階層

tóngbùshùwèijiēcéng ㄊㄨㄥˊ ㄅㄨˋ ㄕㄨˋ ㄨㄟˋ ㄐㄧㄝ ㄘㄥˊ

    • synchronous digital hierarchy
    • SDH

Character by character

Sources