可以随时接通，直接对话的电话线路telephone hotline

• 那时候，我们和克里姆林宫之间有热线电话联系。

  At that time, there was a hotline between us and the Kremlin.

• 全国扫黄办仍使用01065233456、 01065231138两部热线电话。

  The National Office Against Pornographic and Illegal Publications still uses two telephone hotlines: 010 65233456 and 010 65231138.