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The telephone exchange is a special-purpose subscriber exchange. It has a number of telephones sharing the outside line and is applicable to agencies, organizations, small and medium-sized enterprises, etc. It can also be used for residential and secretary telephones. The group telephone exchanges do not require full-time operator and maintenance personnel, and each department can use the indicator to understand the working conditions of the entire system. When an outside call comes in, it can be answered by any phone and can be forwarded to the called party. When any phone wants to call an outside line, simply dial the corresponding key that represents an idle outside line to dial the outside line. Learn more: Please enter the upper right corner of Foshan Wei letter Technology Co., Ltd. Jingdong Mall.