主叫

zhǔ jiào hào mǎ shì duō shǎo

主叫号码是多少？

What's the calling number?

zhǔ jiào diàn huà hào mǎ

主叫电话号码

calling phone number

zhǔ jiào fāng jī hū tīng bù dào qián pái chéng kè de shēng yīn

主叫方几乎听不到前排乘客的声音。

The caller can bearly hear the person on the front passenger's side.