The listing, brand new triplex jack has ended.
1st picture is what you are getting new never been open package.
2nd picture is of where it goes.
3rd shows what you plug in to it.. Another words its just like a regular old phone jack. only you can plug in 3 phone cords.
last pictures is of what you can hook into this triplex jack.
this jack costed me 10.95 at my local walmart
here is what it says about it: 4 conductor for use with 1 or 2 phone wireing systems.
function: converts any single modular jack into three modular jacks.