Split one phone cord into two and now you can plug a fax machine and telephone into the same line at the same time• Extends the reach of a phone cord Converts a single phone cord into two jacks Use a single phone line with 2 phone devices Ivory finish Works with 2 or 4 wire systems.• Connector 1: RJ11 (6P4C) Female• Connector 2 : 2 x RJ11 (6P4C) Female• This RJ11 T adapter is commonly used for converting one single 4-pair connection into two 4-pair connections. Great for phone/fax lines or PBX and data.• Allow for the joining of two short cables in order to extend the length of your need without buying an extra one.• Great for telephone network testing or other possible phone wiring solution.