In one of our warehouse locations we have a bunch of 7911s mounted on the walls for employee' use. I was trying to upgrade the firmware on these phones but it was failing. The phone's Status Messages are showing "Trust List Update Failed". In my experience, when this occurs, deleting the ITL File on the phone will usually fix this problem.
So I attempted to do this remotely using curl commands but was getting a "<CiscoIPPhoneError Number="4" />" message in response. I used the same commands on known working 7911s and it worked just fine using one of the Application Users for authentication. But, not on these phones.
So I asked someone physically in that location to perform the ITL File erase. But, they're telling me when the click the Application Menu button, they are prompted for a User-ID and PIN. However, these phones are configured as "Public/Shared Space", so no Users are specifically assigned to these 7911s in the Device's Config page.
I also attempted to create a test user and assign them to one of these phones. Then I used that's user's ID and PIN in the curl commands. But, I'm still getting the Error=4 in response.
Any idea why someone would be getting prompted for a User-ID and Password while trying to access the Application Menu on these phones?
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