Update: I contacted our Territory Account Manager who is saying that the problem is because we did not purchase our phones through Cisco or one of their vendors even though this is happening to plenty of organizations having the same problem and I wo...

I've had 2 tickets opened with TAC (one with CUCM/phone and one with Expressway) engineer.

Thanks, but all this will prove is that the phone is going off or on hook.  It does not indicate what is causing the issue.  I have reached back out to our Territory Account Manager to see if this can be brought back up to the BU for investigation/re...

Not everyone can use a softphone.  If Cisco offers an option for using a physical phone off network (MRA) then they need to make it work.

I have identified that this ONLY happens through MRA.  If I move the phone that is faulting from our external test network to our internal corporate network, the issue goes away.  This issue appears to be isolated to MRA phones, so I'm suspecting som...