| 1. | Pstn public switched telephone network 公用交换式电话网 |
| 2. | Pstn public switched telephone network 公共电话交换网 |
| 3. | Pstn public switched telephone network 公众交换电话网 |
| 4. | Pstn public switched telephone network 公用电话交换网 |
| 5. | Pstn : public switch telephone network 公用交换电话网 |
| 6. | Public switched telephone network 公共交换电信网路 |
| 7. | Public switched telephone network 公用电话交换网 |
| 8. | A frequency shift keyed modem for use on the public switched telephone network 公共交换电话网上使用的频移键控调制解调器 |
| 9. | The indicators in this category refer to the volume of traffic carried over the public switched telephone network 此类指标是指公用交换电话网上承载的话务量。 |
| 10. | Specification for simple telephones for connection to public switched telephone networks run by certain public telecommunications operators 由某些公共电信话务员经管的公共转换电话网络连接用简易电话规范 |