Nexia will now need to set up the Z-Wave bridge by powering it on and connecting to the router. There is a very good instructional video embedded on this page, a nice touch to make it easier to install.
On the Z-Wave bridge, open the battery compartment and locate the MAC ID. Enter it in the box on the website and click Continue. Complete the next step within 60 seconds or you will have to call Nexia Customer Service to complete the bridge activation, which I learned the hard way! I’d like to see this extended to 3 minutes; I had to race down the stairs to the basement where the router is after clicking on this page, and did not make it in time; Nexia had to manually allow the bridge over the phone the next morning.
Connect the bridge to the internet by plugging it into your router and power it on.
Bridge now activates and does a firmware upgrade.

If you looked up the relationship of vivint 2gig and nexia. You would realize where all this technology stems from. In one way or another it stems from vivint. Just saying.
Not sure what you are getting at. Vivint uses Alarm.com as its backend, where Nexia hosts its own servers and maintains its own systems while you provide, via broadband internet, the pipe to the Nexia servers. Vivint was a viable option, but wanted a contract extension of 52 months and offered entry-level locks.