Section 700 - Operation Chapter 3. System FeaturesS-ICX-50-700 S-ICX (International) issued October 2000 57Considerations• N/ADay 1/ Day 2/Night Delayed RingingDelayed Ringing causes an incoming outside call that is unanswered at a primary extension within acertain period of time, to ring at a designated extension or extensions. Delayed ringing destinationscan be set for Day 1, Day 2 and Night modes. trunk Delayed Ringing is also available for hunt grouppilot numbers.Hardware Requirements• N/AConsiderations• N/ADDI (DID) Day/Night Ringing(Note: Analog DID is not available in the UK, TX or EX model).Incoming DDI calls can be set to ring at day destinations when the system is in day mode and ring atnight destinations when the system is in night mode.Hardware Requirements• DDI (DID) Trunk CardConsiderations• N/ADDI (DID) Day/Night Busy/Delayed RingingDDI Day/Night Busy/Delayed Ringing causes an incoming DDI call to a busy primary extension toring at a designated extension or extensions. DDI Busy/Delayed Ringing also causes an incomingDDI call that is unanswered at a primary extension within a certain period of time, to ring at adesignated extension or extensions. Separate ring destinations are available for day and night modes.DDI Busy/Delayed Ringing is also available for hunt group pilot numbers. However, when theQueuing Timer expires, the call leaves the hunt group and is forwarded to the DDI Busy/DelayedRinging destination.Hardware Requirements• N/AConsiderations• Call Forwarding takes priority over DDI Busy/Delayed Ringing• If the call is part of a hunt group and the Queuing Timer expires, the call is forwarded to the DDIBusy/Delay Ringing destination. (See “DDI (DID) Day/Night Busy/Delayed Ringing” on page57.)Busy Lamp Field RingingExtensions that have Direct Station Select (DSS)/BLF FF keys assigned may be set to ring on thosekeys.