For some reason, any changes I make to the telephony voice section will not save. I click apply. I click ok. Nothing happens either way. I noticed the telnet box was unchecked under device access. I checked that but it did not make a difference. Nothing is in red that needs to be fixed. If there are red boxs, I fix them, the tabs turn green and I still can not save.
I have tried 2 different computers and multiple UC500s all with the same result.