There is another option somewhere else that is stopping you from making the change you want.
For example: You cannot edit the "TFTP Server 1" setting until going down to line 32 and changing "Alternate TFTP" to YES. (or turning off DHCP, I believe...there may be more than one possible prerequisite)
I'm not able to access my old voice mail messages all of a sudden. The recording says something like 'the message is currently not available'. This has never happened before in all the years I have been using this system. I have t...