If the call is left in orbit past the Orbit Recall time, it will recall the extension from which it was initially parked. During the recall, the Park Orbit key on all extensions will continue to flash allowing any user to retrieve the call.
[<3.01] The orbit key is on (red) at all other extensions while the call is parked. Additionally, another extension user can not use their orbit key to pick up the call while it is recalling.