THIS ARTICLE IS WORK IN PROGRESS. SOME THINGS DON’T ADD UP SO I AM REACHING OUT TO PLT AND SENN FOR CLARIFICATION - KYLE *For compat info on this hookswitch for the Leitner headset for Aastra phones, check out this article! Aastra and Zultys EHS Set up Sennheiser set up: 1) Plug the connector cord with green sticker into the headset base. Plug the other end into the couple box. (PLEASE NOTE: this is not the regular connector cord that comes with the cube. It has a round shape and the cord is longer) 2) Grab the Y-cord and plug the single end with a blue sticker into the coupler box 3) Plug 1 end of the top of the y-cord into the HEADSET jack of the phone 4) Plug the other end of the top of the y-cord into the EHS or EXT port in the back of the phone 5) Move Dipswitch #1 Down and set to A for Sennheiser Plantronics CS500/Savi set up: - You will be using cat #2140 1) Plug one ehd of the EHS into the back of the headset base 2) Other end will go into the HEADSET jack of the phone (or EXT…