Busy problem. According to the information of Langfang Education Department, it is a busy problem that the telephone of Langfang Education Department is not answered. The telephone service can only be one-to-one, and the phone can't get in. You need to wait for the other party to finish the call before you can make a phone call. Busy: indicates that the called party is on the phone when making a call. At this time, the phone will be disconnected. You can connect the phone again after the called party hangs up. The default call mode is one-to-one, so when the call is established, it means that the caller and the called party are connected, and the others can't be connected temporarily, which means that the line is busy.