If the last 4 digits are the same, you're dial plan will NOT change. You will need to update your External Masks on each line to reflect the new prefix. The easiest way to do this is to Bulk Administration on the Publisher. You can select all lines, update External Mask, and add in 408-654-xxxx. Run the job and it will update all lines in the system.
If you have any h323 routers, these will also need to be updated as well. (depending on the dial peers, etc)
If you have any custom translations dealing with 408-328-xxxx you will need to update this as well.
If you have any Route Patterns or Dialing Rules, Application Dialing Rules, etc, check these.
You could also check the Dial Plan report, enter in the 408-328 (anything that starts) and see if there are others in the system.
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...