| ABR | Area Border Router | 区域边界路由器 |
| AC | Attachment Circuit | 接入链路 |
| ADC | Analog Digital Converter | 模拟数字转换器 |
| ADM | Add and Drop Multiplexer | 分插复用器 |
| ADSL | Asymmetric Digital Subscriber Line | 不对称数字用户线 |
| AES | Advanced Encryption Standard | 高级加密标准 |
| AF | Assured Forwarding | 确保转发 |
| AF | Adaptation Function | 适配功能 |
| AFI | Authority and Format Identifier | 权限和格式标识符 |
| AIS | Alarm Indication Signal | 告警指示信号 |
| AMI | Alternative Mark Inversion | 信号交替反转码 |
| 通信人家园 (https://www.txrjy.com/) | Powered by C114 |