ScopeThis doc will show you how to connect and set up a Jabra Engage 75 to a Yealink T4xS using EHS 36 or Micro USB.Items NeededJabra Engage 75Yealink T4xSEHS 36 or Micro USBEthernet CableRJ11 CableRJ12 CableConnecting the Jabra Engage 75 (EHS 36)With everything out of the box and the Jabra connected to power, connect the EHS36 (the side with extra port [dot]) to headset base AUX port using an ethernet cable.Connect the EXT port on the Yealink to the EHS36 adapter (side without the extra port) using an RJ12 cable.Connect the Headset port on the Yealink to the blue headset port on the headset base.Configuring the Jabra Engage 75 (EHS 36)Firstly, select the language you want the Jabra to be in, then select start setup.Select yes to set up a desk phone.Select confirm, to confirm that all of the cables are connected.It will reboot and update.Once it comes back up, select the EHS adapter, for this step you can select any of them.When it asks you put on the headset, take it off of the base and press ok.Now that the headset is off of the base, on the Yealink T4xS lift the handset and confirm that on the base of the Jabra.Once you click the headset button, then you should hear the dial tone in the headset.Click Yes to confirm that you could hear the dial tone in the headset on the base.Select no, when prompted to if you would like to set up and mobile phone.The base will reboot and once it is up, hold the menu button for more than two seconds, which will give you the advanced menu.When on the advanced menu, scroll to desk phone and select yes.Select yes, on start setup.Scroll down until you get to EHS Mode and select "Auto" as the mode.Scroll back and the base will reboot.While it is rebooting, unplug the EHS from the phone and plug it back in.Now, if you click the green phone button on the Jabra base the phone should go on hook.Connecting the Jabra Engage 75 (Micro USB)With the base already connected to power, connect the base to the phone using a Micro USB. (Make sure that you connect the USB cable into the USB port that does not have the computer icon.) Configuring the Jabra Engage 75 (Micro USB)Select a language you want the Jabra to be in and do not select setup.The base is already configured for USB desk phones and does not require the setup wizard.