The standard telephone line connector that is plugged into a jack in the wall to receive phone service uses RJ-11 connectors.
This connector is also used to connect computers to internet or private networks. It is the standard connector used on 2-pair (4-wire) UTP (Unshielded Twisted Pair) and flat-satin untwisted cable. It is also the standard connector used in telephone wiring.
The RJ-11 connector actually has 6 connector positions. However, only 4 are normally wired and in many cases only 2 are utilized.
