Has anyone found a solution that will add a delay between the time unity accepts a call and the time the greeting is played. I have a customer who seems to be having trouble transferring directly to voicemail. By the time they hit the transfer buttone the second time, the first few second of the greeting is clipped off. They want to know, short of re-recording greeting to include a delay, if there is someway to configure that delay.
You can try to edit your Switch configuration.
Start---Programs--unity--edit switch utility
Then go to edit and incoming calls and look at your delay before opening.
This delay applies to both transferred and normal calls to voicemail.
You failed to mention your unity version but the above is for 4.x.