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。一个400电话号码，理论上可以设置无限多分机号，分机号的位数，最长8位。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。
The virtual extension number can be set for the 400 phone. When we dial a 400 number with the extension number set, the system will prompt for the extension number and then connect it. A 400 phone number, theoretically, can be set with unlimited extension numbers. The number of extension numbers is 8 digits at most. For non centralized office enterprises, a 400 phone number can be used to connect all employees' mobile phones in series. Each employee's phone number can have a separate extension number.
400电话可设置在不同的节假日，用户呼入电话时，听到的欢迎语不同。如在新年呼入时，听到"祝您新年快乐",在国 庆节的时候，听到"祝您国庆愉快"不同欢迎语。如在非工作时间客户呼入，则可提示"现在是非工作时间，您可在工作时间呼入"等。
400 phone can be set in different holidays. When users call in, they hear different welcome words. For example, at the time of new year's call in, I hear "wish you a happy New Year" and at the time of national day, I hear different welcome words "wish you a happy National Day". If the customer calls in during non working hours, you can prompt "it's non working hours now, you can call in during working hours" and so on.