| 缩写 | 全称 | 中文释义 |
|---|---|---|
| NA | Not Answered | 没有回答 |
| CND | Calling Number Display | 呼叫号码显示 |
| CIC | Carrier Identification Code | 承运人识别码 |
| CAS | Carrier Activity Sensor | 载波活动传感器 |
| CUSA | Central Urban Service Area | 中心城市服务区 |
| TAP | Telecommunity Appalachian Project | 阿巴拉契亚远程通信项目 |
| DOD | Dial On Demand | 按需拨号 |
| TIC | Talking In Confidence | 私下交谈 |
| ACF | Advanced Communications Facility | 先进通讯设施 |
| BPS | Baud Per Second | 每秒波特率 |