| 缩写 | 全称 | 中文释义 |
|---|---|---|
| CASE | Common Application Service Elements | 通用应用程序服务元素 |
| SC | Sim Card | SIM卡 |
| PTMC | PCI Telecom Mezzanine Card | PCI电信夹层卡 |
| PHS | Peak Hour Service | 高峰小时服务 |
| PSDS | Public Switched Digital Service | 公共交换数字业务 |
| DPBX | Digital Private Branch Exchange | 数字专用交换机 |
| NADH | North American Digital Hierarchy | 北美数字等级 |
| MSO | Multiple Service Operator | 多业务运营商 |
| DF | Distributing Frame | 配线架 |
| OOS | Out Of Service | 停用 |