公用交换电话网

public switched telephone network / PSTN

public / collectively owned / common / international (e.g. high seas, metric system, calendar) / make public / fair / just / Duke, highest of five orders of nobility 五等爵位[wu3 deng3 jue2 wei4] / honorable (gentlemen) / father-in-law / male (animal)

public / for public use

to use / to employ / to have to / to eat or drink / expense or outlay / usefulness / hence / therefore

to hand over / to deliver / to pay (money) / to turn over / to make friends / to intersect (lines) / variant of 跤[jiao1]

to exchange / to swap / to switch (telecom) / commutative (math) / to commute

to exchange / to change (clothes etc) / to substitute / to switch / to convert (currency)

lightning / electricity / electric (bound form) / to get (or give) an electric shock / phone call or telegram etc / to send via telephone or telegram etc

telephone / CL:部[bu4] / phone call / CL:通[tong1] / phone number

dialect / language / spoken words / speech / talk / words / conversation / what sb said / CL:種|种[zhong3],席[xi2],句[ju4],口[kou3],番[fan1]

old variant of 話|话[hua4]

telephone network

net / network