Douglas Electrical Components Datasheets for Modular Connectors and RJ Connectors
Modular connectors and RJ connectors includes two similar, yet distinct styles of connectors. Modular connectors are made of "plug-in units" which can be added together to make the system larger, improve the capabilities, or expand its size. Registered Jack (RJ) is a telephone and data jack application specific connector registered with the FCC.
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