How to Transfer a Call Directly to a User Voicemail?
When you are on the call, press the dual phone key ☏⇾☏ on the telephone, then dial *99, followed by the user voicemail extension number, and press the double phone key ☏⇾☏ again to complete the transfer to the user mailbox.
Sheet Cheat
☏⇾☏ *99 Ext 102 ☏⇾☏.
Note: The example sheet cheat is using extension #102 as a destination.