Product Name: Telephone Wiring Box, Type: RJ11 6P2C, 6P4C Bipolar Terminal Box Modular Cable Length: 3m The RJ11 telephone exchange box can connect two devices together, such as telephones, fax machines, and POS machines. It is easy to use, and for outgoing calls, any phone can make the call. During a call, even if other phones are disconnected, it will not affect the call on this unit. This telephone wiring box is made of plastic material. This telephone adapter can be used with other telephones and fax machines, eliminating the need for repeated plugging and unplugging, saving a lot of time, and is a good companion for office meetings. Note: This splitter only distributes and cannot answer other calls simultaneously, and does not have a confidentiality function.