| 缩写 | 全称 | 中文释义 |
|---|---|---|
| OOS | Out Of Synchronization | 不同步 |
| CUG | Closed Users Group | 关闭的用户组 |
| LAPD | Link Access Procedure D channel | 链路接入程序d通道 |
| RADIUS | Remote Authentication Dial-In User Service | 远程身份验证拨入用户服务 |
| PLAR | Private Line Automatic Ringdown | 专线自动关机 |
| AOC | ADSL (Asynchronous Digital Subscriber LIne) Overhead Control channel | ADSL（异步数字用户线）架空控制信道 |
| SWF | SWitched Fractional | 切换分数 |
| FRSS | Frame Relay Switching System | 帧中继交换系统 |
| CR | Call Reference | 调用引用 |
| DMPB | Digital Multi-Point Bridging | 数字多点桥接 |