You found the coolest vintage phone.
It has this round thing in the middle that you put your fingers in and twist around in order to dial it!

It is so cool! But then you go to plug it in and it's got this really short phone cord that's "built-in"!

Don't freak out this Coupler easily connects that "built-in" cord to a separate phone extension cord.

Telephone Cord Coupler pairs two phone cords, extending your existing phone cords.

One modular RJ11 jack to one RJ11 jack.
4-wire construction for handling up to two separate phone lines.
High Micron plating on RJ11-type connector and female jack help maintain clearer conversations.