About Alternate Contact Numbers
Alternate contact numbers allow you to offer callers the option to transfer to other numbers by pressing a key as they listen to your greeting. An alternate contact number can be the extension for an operator or for another user (such as a supervisor or coworker), or any other number where you or another person can be reached.
Your Cisco Unity Connection administrator determines which keys callers can press to transfer to alternate contact numbers; you may be able to specify up to 12 alternate contact numbers (one for each key on the phone keypad).