AAL(ATM Adaptation Layer) 異步轉(zhuǎn)移模式適配層 
    AC(Alternating Current) 交流 
    Access Network 接入網(wǎng) 
    ACI(Adjacent Channel Interference) 鄰頻干擾 
    Additional Channel:增補頻道 
    Adjacent Channel Transmission 鄰頻道傳輸 
    ADSL(Asymmetrical Digital Subscriber Line) 不對稱數(shù)字用戶線路 
    AGC(Aotomatic Gain Control) 自動增益控制 
    AIC(Auxilliary Information Channel) 輔助信息信道 
    ALC(Aotomatic Level Control) 自動電平控制 
    AM(Amplitude Modulation) 幅度調(diào)制(調(diào)幅) 
    AML(Amplitude Modulated Microwave Link) 調(diào)幅微波鏈路 
    Amplifier 放大器 
    Application Layer 應(yīng)用層 
    ARP(Address Resolution Protocol) 地址識別協(xié)議 
    ASC(Aotomatic Slope Control) 自動斜率控制 
    ATM(Asynchronous Transfer Mode) 異步傳輸模式(協(xié)議) 
    BAL(Bit ALlocation) 比特分配 
    Bandwidth 帶寬 
    BB(Basis Band) 基帶 
    BBER(Background Block Error Rate) 背景塊誤碼率 
    BC(Broadcast Channel) 廣播信道 
    BCN(Broadcast Communication Network) 廣播通信網(wǎng) 
    BDC(Block Down Converter) 下變頻器 
    BER(Bit Error Rate) 誤碼率 
    B－ISDN(Broadband－Integrated Services Digital Network) 寬帶綜合業(yè)務(wù)數(shù)字網(wǎng)絡(luò) 
    Bit Stream 比特流(碼流) 
    BPF(Band Pass Filter) 帶通濾波器 
    BPS(Bits Per Second) 比特／秒，也寫作b/s 
    BRI(Basic Rate Interface) 基本速率接口 
    Broard Band Communication 寬帶通信 
    BRR (Bit Rate Reduction) 比特率壓縮 
    C/CSO(Carrier to Composite Second Order beat ratio) 載波復(fù)合二次差拍比 
    C/CTB(Carrier to Composite Triple Beat ratio) 載波復(fù)合三次差拍比 
    C/I(Carrier to Inter－modulation ratio) 載波互調(diào)比 
    C/N(Carrier to Noise ratio) 載噪比 
    CA(Conditional Access) 有條件存取(有條件接收) 
    Cable Router 線纜路由器 
    CAC(Conditional Access Control) 條件接收控制 
    CAID(Conditional Access IDentifier) 有條件存取(接收)標志 
    CATV(Cable TeleVision) 有線電視 
    CATV(Community Antenna TeleVision) 共用天線電視 
    CCIR(International Radio Consultative Committee) 國際無線電咨詢委員會 
    CCITT(Consultative Committee of International Telephone and Telegraph) 國際電報電話咨詢委員會 
    CCU(Communication Control Unit) 通信監(jiān)測單元 
    CDMA(Code Division Multiple Access) 碼分多址 
    Channel 頻道 
    Channel 信道 
    Chirp 附加調(diào)頻 
    CIF(Commom Interleaved Frame) 公共交織幀 
    CII(China Information Infrastrcture) 中國信息基礎(chǔ)設(shè)施(計劃) 
    Circuit Switching 電路交換 
    CLI(CATV Leakage and Ingress) 有線電視泄漏與竄入 
    CM(Cable Modem) 電纜調(diào)制解調(diào)器又名線纜調(diào)制解調(diào)器 
    CM(Cross Modulation) 交擾調(diào)制 
    CMCI(Cable Modem to CPE Interface) 電纜調(diào)制解調(diào)器至用戶屋內(nèi)設(shè)備接口 
    CMTRI(Cable Modem Telephone Return Interface) 電纜調(diào)制解調(diào)器中回傳電話接口 
    CMTS(Cable Modem Termination System) 電纜調(diào)制解調(diào)器(Cable Modem)端接系統(tǒng) 
    Coaxial Cable 同軸電纜 
    COFDM(Coded Orthogonal Frequency Division Multiplexing) 編碼正交頻分復(fù)用 
    Communication 通信 
    Community Reception 集體接收 
    CPE(Customer Premises Equipment) 用戶屋內(nèi)設(shè)備 
    CS(Communication Satellite) 通信衛(wèi)星 
    CSMA/CD(Carrier Sense Multiple Access/Collision Detection) 公共載波復(fù)用通路/沖突檢測(用于以太網(wǎng))，也叫帶碰撞檢測的載波偵聽多址、載波偵聽多重接入/碰撞檢測 
    CSO(Composite Second Order Beat) 復(fù)合二次差拍 
    CTB(Composite Triple Beat) 復(fù)合三次差拍 
    CW(Control Word) 控制字