呼叫轉移 call transfer (CT)
呼救 distress call
呼救系統 distress system
呼損率 percept of call lost
呼通概率 calling probability
互補金屬氧化物半導體集成電路
complementary MOS integrated circuit (COMOS-IC)
互連 interworking
互連的考慮 interworking consideration
互連功能 interworking function (IWF)
互調 intermodulation
互調產物（一個發射臺的） intermodulation products (of a transmitting stastion)
互調抗擾性 intermodulation immunity
互調失真 intermodulation distortion
互通性 interoperability
互同步網 mutually synchronized network
話路輸入電平 voice circuit input level
話路輸入電平差異 voice circuit input level difference
話務量 telephone traffic
話音活動檢測 voice activity detection (VAD)
話音激活 voice exciting
話音激活率 speech activity
話音數字信令 speech digit signalling
話音突發 speech spurt
環境試驗 environment test
環境系數 environment factor
環境應力篩選 environment stress screening (ESS)
環境躁聲 ambient noise
環路傳輸 loop transmission
環路高頻總增益 loop RF overall gain
環路可鎖定最底（最高）界限角頻率
loop lockable minimum (maximum) margin angular frequency
環路濾波器比例系數 loop filter proportion coefficient
環路躁聲帶寬 loop noise bandwidth
環路增益 loop gain
環路直流總增益 loop DC overall gain
環路自然諧振角頻率 loop natural resonant angular frequency
環形波 ring wave
環形混頻器 ring mixer
環行器 circulator
環行延遲 rounding relay
恢復 recovery
恢復規程 restoration procedure
匯接交換 tandem switching
匯接局 tandem office
會話（在電信中） conversation (in telecommunication)
會話層 session layer
會議電話 conference telephone
混合ARQ hybrid ARQ
混合差錯控制 hybrid error control (HEC)
混合分集 hybrid diversity
混合集成電路 hybrid integrated circuit
混合擴頻 hybrid spread spectrum
混合路徑傳播 mixed-path propagation
混合信道指配 hybrid channel assignment
混頻器 mixer
混頻器的寄生響應 mixer spurious response
活動模式 active mode
“或”門 OR gate
“或非”門 NOR gate

J
機殼輻射 cabinet radiation
機載電臺 aircraft station
基本傳輸損耗（無線線路的） basic transmission loss (of a radio link)
基本接入 basic access
基本業務（GSM的） basic service (of GSM)
基本越區切換規程 basic handover procedure
基本最高可用頻率 basic maximun usable frequency
基波（分量） fundamental (component)
基波系數 fundamental factor
基帶 baseband
基地（海岸）（航空）設備 base (coast)(aeronautical) equipment
基地電臺 base station (BS)
基站控制器 base station controller (BSC)
基站識別碼 base station identity code (BSIC)
基站收發信臺 base transceiver station (BTS)
基站系統 base station system (BSS)
基站區 base station area
基準條件 reference condition
基準阻抗 reference impedance
奇偶校驗碼 parity check code
奇偶校驗位 parity bit
激活 activation
吉爾伯特碼 Gilbert code
級聯碼 concatenated code
即時業務 demand service
急充電 boost charge
急劇衰落 flutter fading
集成電路 integrated circuit
集成電路卡 integrated circuit card
集群電話互連 trunked telephone connect
集群電話互連器 trunked telephone connector
集群基站 trunked base station
集群效率 trunking efficiency
集群移動電話系統 trunked mobile communication system
集體呼叫 group call
集體接收（在衛星廣播業務中） community reception
集中控制方式 centralized control
集中式幀定位信號 bunched frame alignment signal
計費信息 advice of charge
計算機病毒 computer virus