Need to register multiple Yealink Phones to one Base Station in FreePBX

Hello,

I successfully registered a single W60B base station to FreePBX and connected three W56H phones (also Yealink brand) to the station. I can send and receive calls on one phone, but I am unable to do so with the second or third phone.  Does anyone know of a way to do this?  I want to avoid having to purchase a base station for every phone, and just use one for this purpose.

If there's a better phone that you know of that will allow me to do this, please let me know. I have a situation where I need to extend phones to another nearby building without a switch in it. I already have Wifi extended to it. 

Thanks for your help,

Alan