· Reserve Last CA: Default = Off, Software level = 4.0+.
Used for users with multiple call appearance buttons. When present, this string stops the users last call appearance button from being used to receive incoming calls. This ensures that the user always has a call appearance button available to make outgoing calls and to initiate transfers and conferences. For pre-4.0 IP Office this option is set by adding the RESERVE_LAST_CA= option on the User | Source Numbers tab.
This is what the manual says, if you do not have a free appearance button left then you should open a ticket with Avaya.
you could try to do a workaround and use cover appearance instead then call cover to the other extensions without the actual buttons lighting up and see then if the settings work, that is of course a different setup then the one you have and the users need to work differently to pass calls inbetween each other.
Joe W.
FHandw., ACS
If you can't be good, be good at it!