公用交換電話網 gōng yòng jiāo huàn diàn huà wǎng

DEFINITIONS

  1. public switched telephone network
  2. PSTN

CHARACTERS

公 gōng fair, equitable; public; duke
用 yòng use, employ, apply, operate; use
交 jiāo mix; intersect; exchange, communicate; deliver
換 huàn change, exchange; substitute
電 diàn electricity, electric; lightning
話 huà speech, talk, language; dialect
網 wǎng net, web; network