Y-Cable For Training

[cmotes]

Has anyone found a Y-cable that works with Yealink phones to allow two headsets to plugin to the same phone for training purposes?

I am aware of the "training" mode for Yealink phones where the second headset can be plugged into the handset jack: http://forum.yealink.com/forum/archive/i...40425.html

But, it's a little tough to teach my trainers how to do that, and it means I need to give them admin access to the phone in order to make changes between when they are training and when they are just working. I really don't want to open that pandora's box.

So, is there a Y-cable connector that works for the Yealink wired headsets?