| 缩写 | 全称 | 中文释义 |
|---|---|---|
| USPI | Universal Serial Phone Interface | 通用串行电话接口 |
| AAV | Alternate Access Vendor | 备用访问供应商 |
| PTCM | Pragmatic Trellis Coded Modulation | 语用网格编码调制 |
| NVQ | Normal Voice Quality | 正常语音质量 |
| PIM | Passive Inter-Modulation | 无源互调 |
| WOQS | Wireless Operator Quarterly Service | 无线运营商季度服务 |
| LTT | Libyan Telecommunications and Technology | 利比亚电信和技术 |
| PIC | Phone, Internet, and Cable | 电话、互联网和电缆 |
| LMS | Local Measured Service | 本地测量服务 |
| PTA | Pre-Transmission Audit | 传输前审核 |