Flash places a call on temporary hold and alerts the system that the user is preparing to use the keypad to dial another party or key in a special access code. Forward automatically reroutes incoming calls intended for a particular extension to another extension. Hold allows users to place a call on hold while they are making another call, conferring with another person, etc. Message waiting notifies users of messages waiting on the PhoneMail voice messaging system. Park allows a user to transfer calls to an extension, put it on hold there, and signal the user on the target extension that there is a call waiting.
Transfer allows users, after answering or originating a call, to direct that call to another phone.