（单词翻译:单击）
| 中文 | 英文 | 缩写 |
| 等效（值）忙时呼叫 | Equated Busy Hour Call | EBHC |
| 等效功率流密度 | Equivalent Power Flux Density | EPFD |
| 等效随机业务 | equivalent random traffic | |
| 等效误码率 | Equivalent Bit Error Ratio | EBER |
| 等占用证实超时 | timeout waiting for seizing confirm signal | |
| 低层管理实体 | Low Layer Management Entity | LLME |
| 低端 | low end | |
| 低轨道地球卫星 | Low Earth Orbit satellite | LEO |
| 低级别业务 | low priority traffic | |
| 低级信令转接点 | Low level Signaling Transfer Point | LSTP |
| 低阶 | Lower Order | LO |
| 低阶交叉 | lower-order cross connect | |
| 低阶交叉的公务板 | order wire board of lower-order cross connect | |
| 低阶交叉连接 | lower order cross connect | |
| 低阶通道 | Lower order Path | LP |
| 低阶通道保护 | Lower order Path Protection | LPP |
| 低阶通道串接监视 | Lower order path Tandem Connection Monitor | LTCM |
| 低阶通道串接适配 | Lower order path Tandem Connection Adaptation | LTCA |
| 低阶通道串接终端 | Lower order path Tandem Connection Terminate | LTCT |
| 低阶通道开销监视 | Lower order Path Overhead Monitor | LPOM |
| 低阶通道适配 | Lower order Path Adaptation | LPA |
| 低阶通道终端 | Lower order Path Termination | LPT |
| 低阶通路/通道连接 | Lower order Path Connection | LPC |
| 低阶虚容器 | Lower Order Virtual Container | LOVC |
| 低率复合（复用） | subrate multiplexing | |
| 低频 | Low Frequency | LF |
| 低频分量电平 | level of low frequency component | |
| 低频群 | low frequency group | |
| 低时延码本激励 | Low-Delay Code book Excited Linear Prediction | LD-CELP |
| 低速集成电路 | Low Speed Integrated Circuit | LSIC |
| 低速数据 | Low Speed Data | LSD |
| 低通滤波器 | Low Pass Filter | LPF |
| 低温试验 | low temperature test | |
| 低噪声放大器 | Low Noise Amplifier | LNA |
| 滴流性能 | drip performance | |
| 笛簧继电器 | reed relay | |
| 底场 | bottom field | |
| 底盘的接地片 | chassis grounding lug | |
| 底座 | rack base | |
| 地板下管道 | underfloor duct | |
| 地面电路 | terrestrial circuit | |
| 地面数字视频广播 | Digital Video Broadcasting-Terrestrial | DVB-T |
| 地面数字音频广播 | Digital Audio Broadcasting-Terrestrial | DAB-T |
| 地面网络 | terrestrial network | |
| 地面无线电通信 | terrestrial radio communication | |
| 地面系统 | terrestrial system | |
| 地面信道 | terrestrial channel | |
| 地面站 | ground station |
