虚拟总机
Virtual switchboard
400电话可设定虚拟分机号，当我们拨通一个设定分机号的400号码时， 系统会提示输入分机号，然后接通。对于非集中办公的企业，就可采用一个400电话号码，将所有员工的手机串联起来，每个员工的电话号码，都可设立单独的分机号码。
A 400 telephone can set a virtual extension number. When we dial a 400 number with a set extension number, the system will prompt the input of the extension number, and then connect. For non-centralized office enterprises, a 400 telephone number can be used to connect all employees'mobile phones in series. Each employee's telephone number can set up a separate extension number.