Thanks ralph....yes, they do have voicemail already.
System Properties --> System Feature Settings --> Class Of Service Options....
COS for the user phones....
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Call forward no answer timer is set to 15. Looks like that is in seconds.
Okay...I can edit that to be something like 10 seconds or less.
COS for the trunks
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COS 22 is IP Trunks.
COS 25 is PSTN ISDN Trunks.
Change it for both types of trunks?
And does the number of seconds have to match what is set in the COS for the users?