Modular Connectors
- 4P4C and 4P2C for handset cables (often erroneously referred to as RJ9, RJ10, and RJ22)
- 6P2C for RJ11 single telephone line
- 6P4C for RJ14 two telephone lines
- 6P6C for RJ25 three telephone lines
- 8P8C for RJ61X four telephone lines, RJ48S and RJ48C for four-wire data lines, RJ31X single telephone line with equipment disconnect, RJ38X (similar to RJ31X but with continuity circuit)
Read more about this topic: Telephone Plug, List of Plugs