• If none of an extension’s PDN buttons are idle, DSS buttons of other extensions registered to the PDNextension will turn on red.• Ring Tone PatternThrough system programming, each extension can set ring tone patterns for PDN buttons. Ring tonepatterns can be assigned separately for each SDN button.• Outgoing Line PreferenceWhen "PDN" is selected as the outgoing line preference, outgoing calls will originate on the first availablePDN button (® 1.5.5.2 Line Preference—Outgoing).• Incoming Line PreferenceThrough system programming, it is possible for only incoming calls arriving at PDN buttons to be answeredsimply by going off-hook, by selecting "PDN" as the incoming line preference (® 1.4.1.2 Line Preference—Incoming). This prohibits calls that arrive on non-PDN buttons (e.g., an SDN button) to be answeredwhen going off-hook.• Walking ExtensionFor PDN extensions, the Walking Extension feature can only be used when all PDN buttons are idle (®1.28.3 Walking Extension).• Wireless XDP Parallel ModeIf a PS has PDN or SDN buttons, Wireless XDP Parallel mode cannot be assigned to that PS (®1.25.5 Wireless XDP Parallel Mode).• OHCA/Whisper OHCAA PDN extension cannot receive OHCA or Whisper OHCA, unless the call is made using a correspondingSDN button (® 1.8.4.3 Off-hook Call Announcement (OHCA), ® 1.8.4.4 Whisper OHCA).• Alternate Calling—Ring/VoiceIt is not possible to temporarily change the called party’s preset call receiving method (ring tone or voice)when calling a PDN extension, unless the call is made using a corresponding SDN button (®1.5.3 Intercom Call).[Delayed Ringing]• The same delayed ringing setting is applied to all PDN buttons on an extension. Delayed ringing can beassigned separately for each SDN button.• Through system programming, it is possible to select whether caller information (such as Caller ID) isshown immediately on a PS when a call is received while delayed ringing is set.• Caller information (such as Caller ID) is not shown immediately on a PT when a call is received whiledelayed ringing is set.• SDN buttons can be set to not ring (only flash) for incoming calls. However, this setting is not available forPDN buttons.• The forward no answer timer starts when a PDN extension starts ringing.Feature Guide References1.2.2.2 Group Call Distribution1.20.3 LED Indication2.2.1 Class of Service (COS)3.1 Capacity of System ResourcesUser Manual References1.4.2 Holding a Call1.5.1 Primary Directory Number (PDN)/Secondary Directory Number (SDN) ExtensionUsing Your Calling Privileges at Another Extension (Remote COS Access)Feature Guide 1051.7.1 Primary Directory Number (PDN)/Secondary Directory Number (SDN) Extension
