What is the purpose of this odd looking plug?

This is the plug I'm talking about.

It has 4 pins and this odd plastic rod, and some random RJ socket at the bottom.

Asking out of pure curiosity since I don't need that thing at all :)

Thanks.

Submitted October 30, 2017 at 06:36PM by GermanAf http://ift.tt/2z2RZDu