- 公共交换电话网 gōnggòngjiāohuàndiànhuàwǎng public switched telephone networkthe traditional circuit-switched telephone network used for global telecommunications; PSTN
- 公用交换电话网 gōngyòngjiāohuàndiànhuàwǎng public switched telephone networkthe public switched telephone network (PSTN) system
- 电话网路 diànhuàwǎnglù telephone networkA network used for transmitting telephone calls across different locations