There were two issues with this system. One was the Y2k bug patch, and the other was the Y@K01 problem.
UNIX file systems record their date codes differently than Microsoft systems, so the Y2K problem did not happen on Y2K, but on September 9th 2001 (Unix date code 999,999)
There was no fix for this second one. When that date rolled over, it caused corruption in the database on the ISIII and caused issues like you are experiencing.
I am not saying that that is your problem, as there are many variables, however...
Easy way to tell is to go into the customer/subscriber extension forms and look at the profiles of each mailbox. If you see "swiglies" or data were it should not be, then there is corruption in the ISIII database.
The only known fix for this from AVAYA at the time was to back date the unix software 11 years and reenter the information in each mailbox to the correct info and the problem.
Also correct any system forms that show the same conditions.
That should fix the corruption and allow calls to transfer to valid extensions in the voicemail system. They will drop otherwise.
The best!!!! way to fix this is to forklift the old box, however, customers with these type of voicemails tend to be partial(CHEAP!) to these systems.
Come to think of it, I think the Pentagon still has one....I will have to check!!!
Netcon1