To add even more power to the Impression system, Departmental Call Distribution and Direct Inward Station Dialing have been built right in - no costly extra software is required. DCD automatically routes calls to an open station within the appropriate department. If the call goes unanswered, or all stations are busy, it's quickly switched to your attendant with the option to take the call or place it in queue to be answered by the first available station. With Direct Inward Station Dialing (DISD), select callers can read a specific station without going through an attendant, adding convenience for the caller and freeing receptionists from handling routine call routing.