Avaya T3 (IP) Compact - Manual (Page 16)

Commissioning your T3 IP telephone (only T3 IP)
16
Familiarize yourself with your telephone
Log out of telephone
When you want to log out of the telephone:
Press the "Menu" function key
Scroll to the menu item Call-forwarding .
Confirm selection. You are now logged out of this telephone. Another user can
now log in here.