| PSTN | Public Switched Telephone Network | 公用电话交换网 |
| PSTN | Pesticide Safety Team Network | 农药安全队网络 |
| PSTN | Public Switched Telecommunications Network | 公共交换电信网 |
| PSTN | Public Service Telephone Network (less common) | 公共服务电话网（不太常见） |
| PSTN | Postal Satellite Training Network | 邮政卫星训练网 |