RJ61 (Registered Jack 61) is a physical interface often used for terminating twisted pair type cables. This pinout is for multi-line telephone use only; RJ61 is unsuitable for use with Ethernet over twisted pair (10BASE-T, 100BASE-TX and1000BASE-T) because the pins for pairs 3 and 4 are too widely spaced. The following schematic shows the RJ61 Pinout Diagram and Wiring Color Code.
RJ61 Pinout Diagram
RJ61 Wiring Color Code (USOC)