Yealink EHS Catalog #2184. EHS items needed: The two cords that you need are the the RJ45 cord and the RJ12 cord. It may be useful to describe it as the short flat cable (RJ45) and the short round cable (RJ12). We will also need the box that says YEALINK ***You won't use the curly cord, the y-shaped cord, or the short 3.5mm cord that comes with your Yealink set.*** Please note we will also need the connector cord that comes with the Leitner headset Yealink EHS with Leitner set-up: 1) Before you start, unplug the power cable from the back of the base and set the RHL/DHSG button on the bottom of the Leitner wireless headset charging base to DHSG. 2) Connect the RJ45 end to the AUX JACK on the back of the Leitner wireless headset charging base (this is the largest jack in the center of the base). Other end will go into the left hand side of the YEALINK box 3) Connect the RJ12 cord to the other end of the Yealink box (the smaller side) and the other end to the EXT Port of the Yealink tele…