The RJ9 is a 4P4C modular connector used with telephone handsets and headsets. Typically, the coiled cord between the telephone base and handset will have 4P4C plugs on both ends.
Despite the RJ naming, it is not recognised by the ANSI/TIA-968-A Specification, probably because it is not used for connecting CPE to the Telephone Network.
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Created 2022-02-08 09:05 by Stephen B (Revised 2023-03-09 04:32)
Keywords: RJ9, RJ9 Connector, and RJ9 Plug