Telephone wired jack 623K 6P6C, RJ11 socket with custimized wire
A telephone plug is a type of connector used to connect a telephone
set to the telephone wiring inside a building, establishing a
connection to a telephone network. It is inserted into its
counterpart, a telephone jack, commonly affixed to a wall or
baseboard. The standard for telephone plugs varies from country to
country, though the RJ11 modular connector has become by far the
A connection standard, such as RJ11, specifies not only the
physical aspects of an electrical connector, but also the pinout,
i.e. the assignment or function of each contact. Modular connectors
are specified for the registered jack (RJ) series of connectors, as
well as for Ethernet and other connectors, such as 4P4C (4
position, 4 contacts) modular connectors, the de facto standard on
handset cords, often improperly referred to as RJ connectors.
The invention of the modular jack and plug is one of the most
important in connector history, as it gave rise to 8-wire Ethernet
connector systems today.
|Housing||Glass filled polyester UL94V-0|
|Contact||Phosphor bronze Φ0.46mm|
|Plating||Gold plating over nickel|
|Wire styles||UL 1061 26AWG strands|
Mechanical and Environmental:
|Durrability||750 cycles min.|
|Extraction force of the wire||25N min.|
• A simple, inexpensive strip and crimp tool can put the plug on a
cord in seconds.
• The actual contact is a tiny piece of stamped metal with a surface
to mate with the jack and a two pronged point that pierces the
insulation, making contact with the conductors.
• A plastic section of the housing pivots down to lock the cord in
the plug, providing strain relief.
• The simple latch snapped into the phone or the wall, with just
enough retention that it stayed connected, but not so much that the
cord wouldn’t let loose when tripped over.
• The conductors in most phone cables are foil, wrapped around a
plastic wire. This provides a low cost solution and keeps the cable
quite flexible, especially important for the coiled cord used
between the phone and the handset.
• The connectors are small and simple.
A modular connector is an electrical connector that was originally
designed for use in telephone wiring, but has since been used for
many other purposes. Many applications that originally used a
bulkier, more expensive connector have converted to modular
connectors. Probably the best known applications of modular
connectors are for telephone and Ethernet.