When Night Station Service is active but you have not established Night Station extensions, a user can activate TAAS.

You can assign a Night-Serv button to either an attendant extension or a phone extension. An individual trunk group or hunt group can be put into night service by either an attendant extension or a phone extension with the necessary button. When a user presses this button to activate Night Station Service, all calls to that particular trunk group or hunt group are routed to the Night Service extension assigned to that group.

If a trunk without disconnect supervision goes to Night Service, the system drops the trunk after a period of time to avoid locking up the trunk. The call is not routed to the DID-LDN night extension.