RJ12
Modular Telephone Plug (6P6C)
Invented in
1970s
Invented by
Bell System
Availability
Uncommon
A close relative of RJ11 using all six contacts (6P6C), used for multi-line phones and handset cords. Visually almost identical to RJ11.
Technical specifications
Standard6P6C
SignalTelephone (multi-line)
Contacts6
FamilyModular (RJ)
Recommended brands
01Telegärtner
02Goobay
03Hama
Where to buy
Europe-focused retailer searches. Some links are affiliate links and may earn a commission.
Fun fact
RJ11, RJ12 and RJ14 all share the same 6-position housing, they differ only in how many of the contacts are actually wired.
Tips & tricks
Count the contacts: 6P6C (RJ12) wires all six; RJ11 uses only the inner two or four.
Philosophy
Proof that "the same plug" can mean three different things. The modular family loves to hide its variety in plain sight.
Applications
Internet
