I have reserved a Collaboration 11.0 Lab and connected to the CUCM with the Jabber Sample HTML successfully.
I want to ask is it possible to make a real call from this Sandbox to the physical phone? (e.g.: make a real call to my office)
We currently do not have PSTN set up for these Collaboration labs. you can call to other endpoints registered to your sandbox though. Is this a feature you would like to see introduced?
It would be a nice feature to have. Although the lab is sufficient for testing. Calling outbound numbers only proves gateway configurations which can be tested with other methods. I use a lab that I built for that sort of stuff, with multiple gateways and routers. It never hurts to have a few of those around to build and test with.