| 缩写 | 全称 | 中文释义 |
|---|---|---|
| RFC | Request For Comments | 征求意见 |
| AIS-V | Virtual | 事实上的 |
| ISSIP | Inter-Switching System Interface Protocol | 交换系统间接口协议 |
| FAW | Frame Alignment Word | 框架对齐字 |
| IOC | Inter-Office Channel | 办公室间通道 |
| UTP | Unshielded Twisted Pair | 非屏蔽双绞线 |
| XI | X Identification (frame) | X标识（框架） |
| UDLC | Universal Digital Loop Carrier | 通用数字环路载波 |
| SQR | Signal to Quantizing noise Ratio | 信噪比量化 |
| SHR | Self-Healing Ring | 自愈环 |