緊急呼叫 emergency call
緊急指位無線信標臺 emergency position-indicating rediobeacon station
近場區 near field region
禁止對國際的呼叫 barring of outing international calls (BOIC)
禁止所有對外呼叫 barring of all outgoing calls (BAOC)
禁止所有呼入呼叫 barring of all incoming calls (BAIC)
緊密度 precision
靜電放電 electrostatic discharge (ESD)
靜噪 squelch
靜噪開啟電平和閉鎖電平 squelch opening level and closing level
靜噪開啟時延和閉鎖時延 squelch opening delay and closing delay
靜噪失諧門限 squelch detuning threshold
靜噪調諧 mute tuning
靜噪阻塞門限 squelch blocking threshold
靜止圖象電視電話 still picture video-television
靜止衛星 stationary satellite
鏡頻抑制比 image frequency rejection ratio
鏡頻抑制混頻器 image frequency rejection mixer
糾錯碼 error correcting code
糾錯能力 error correcting capability
糾突發錯碼 burst error correction codes
糾突發錯和隨機錯碼 burst and random error correction codes
救生臺 safeguard station
局域網 local area network (LAN)
句子可懂度 sentence intelligibility
具有可適應比特分配的自適應預測編碼
APC with adaptive bit allocation (APC-AB)
卷積碼 convolutional code
絕對射頻信道號 absolute RF channel number (ARFCN)
絕對相移鍵控 absolute phase shift keying (APSK)
絕對增益 absolute gain
均步的 mesochronous
均方根值（有效值） rms value (effective value)
均方根-波紋系數 r.m.s.-ripple factor
均方根檢波器 root-mean square detector
均衡網絡 equalization network
均勻編碼 uniform encoding
均勻量化 uniform quantizing

K
喀聲 click
喀聲率 click code
開發系統 development system
開放系統 open system
開放系統互連 open system interconnection (OSI)
開放系統互連參考模型 open system interconnection (OSI) reference model
開關電容網絡 switched capacitor network
開關電源 switch power supply
開戶入網 subscription
開環電壓增益 open-loop voltage gain
開環控制 open-loop control
開環增益 open-loop gain
開路電壓 open-circuit voltage
開門碼 opening code
抗騷擾性 immunity (to a disturbance)
抗擾度 immunity
抗擾試驗電平 immunity test level
抗擾性電平 immunity level
抗擾性限值 immunity limit
抗擾性余量 immunity margin
抗躁聲送話器 antinoise microphone
可編程終端 programmable terminal
可變電容器微音效應 microphone effect of variable capacitor
可變分頻器 variable division frequency divider
可擦可編程只讀存儲器 erasable programmable read only memory (EPROM)
可達性 accessibility
可服務性 serviceability
可焊性 solderability
可焊性試驗 solderability test
可見弧 visible arc
可接收質量水平 acceptable quality level
可靠性 reliability
可靠性測試 reliability testing
可靠性分配 reliability allocation
可靠性和維修性保證 reliability and maintainability assurance
可靠性設計 reliability design
可靠性預計 reliability prediction
可靠性增長 reliability growth
可拓展性 expansibility
可視電話 television telephone
可視電話機 television telephone set
可適應性 adaptability
可調數位時隙（可塞入數位時隙） adjustable digit time slot (stuffable digit time slot)
可聽聲 audible sound
可維修性 maintainability
可信度 certainty factor
可移植性 portability
可用場強 usable field strength
可用功率通量密度 usable power flux density (Pu)
可用時間 available time
可用性 availability
可預置分頻器分頻比 prescalar divider division ratio
可重用性 reusability
客觀評價 objective evaluation
空分 space division
空分多址 space division multiple address (SDMA)
空間分集 space diversity
空間激光通信 laser space communication
空間探測器 space probe
空間無線電通信 space radiocommunication
空間系統 space system
空間站（電臺） space station