（单词翻译:单击）
| 中文 | 英文 | 缩写 |
| 闭合用户群 | Closed User Group | CUG |
| 闭塞出 | outgoing blocked | |
| 闭塞解除信号 | UnBLocking signal | UBL |
| 闭塞入 | incoming blocked | |
| 闭塞信号 | BLOcking signal | BLO |
| 闭塞证实信号 | BLocking Acknowledgement signal | BLA |
| 闭锁出局国际呼叫 | Barring of Outgoing International Call | BOIC |
| 闭锁除直接到归属PLMN国家外国际呼叫 | barring of outgoing international calls except those direct to the home PLMN | |
| 闭锁全部输出呼叫（除归属国外） | barring all outgoing calls (except home country) | |
| 闭锁所有国际呼出业务 | Barring of all Outgoing International Calls | BOIC |
| 闭锁所有呼出业务/闭锁全部去话 | Barring of All Outgoing Calls | BAOC |
| 闭锁所有呼入业务/闭锁全部来话 | Barring of All Incoming Calls | BAIC |
| 闭锁用户线 | block subscriber line/close subscriber line | |
| 壁挂式 | wall-mounted | |
| 避雷针 | lightning arrester | |
| 边带滤波 | sideband filter | |
| 边界关口 | Border Gateway | BG |
| 边界网关协议 | Border Gateway Protocol | BGP |
| 边模抑制比 | Side Mode Suppression Ratio | SMSR |
| 边信息 | side information | |
| 边缘交换单元 | Edge Switch | ES |
