Call the housekeeper directly without ringing the bell.

Explain that the other party's mobile phone number has opened the call butler service.

Call Manager is a communication assistant service, which is used to remind and manage missed calls. When the user's mobile phone is turned off and there is no power or signal, the incoming call will be transferred to the voice platform of the incoming call manager, and the incoming call manager system will pick up the power for the user and send a short message to remind the user of the missed call.