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模式(ATM)= Asynchronous Transfer modecell 信元,feeder 饋電線有線電視CATV = munity antenna television障礙物 obstructionunidirectional 單向的nonadjacent 不相鄰的,turn over 反復考慮with the sponsorship of 在的資助下on the order of 與相似的toehold 立足點 ,notebook 筆記本掌上電腦 palmsized puter backbone 骨干,脊椎機頂盒 settop TV box multiplex 多路復用ISDN = integrated services digital network 分組交換 packetswitch數(shù)字用戶線路 DSL = digital subscriber linestore and forward 存儲轉(zhuǎn)發(fā)計算機串口 the serial port of puter devices它是短距離(少于30米)的低速率(為38kbps)傳輸標準This standard is for low bit rate(up to 38kbps) transmission over short diatances(less than 30m)每次一個字符 one character at a time可以添加一個奇偶校驗比特用于檢錯 they can add a parity bit for error detection連續(xù)字符 successive characters時間間隔 time interval 當接收器檢測到一個新字符的開始時When the receiver detects the beginning of a new character非雙絞線 untwisted wires隨著速率和距離的增加 as the rate and the distance increase 17課 simultaneously 同時的 facsimile 傳真 audio 音頻 severe terrain 惡劣的地形 posite 合成 preemphasis network 預加重網(wǎng)絡 deviator 偏差器 precede 在之前 am