I have two OBis, a 110 in the house and a 202 in my workshop. These are both cabled on the same LAN. I have set things up so that all phones ring on an incoming call and any phone can answer the call. Each OBi has its own SIP extension at my VSP. This all works as far as it goes but I am keen to extend the functionality.
I am hoping to have the ability to receive calls at the house, put the call on hold while I alert the workshop, and ultimately transfer the call to the workshop. I would also want the same functionality from workshop to house. What infrastructure would be required to achieve this result?