13.1.7 PDN (Primary Directory Number)/SDN (Secondary Directory Number) Extension
Through system programming, it is possible for only incoming calls arriving at PDN buttons to be answered simply by going
•Walking Extension
For PDN extensions, the Walking Extension feature can only be used when all PDN buttons are idle (→
20.1.2Walking Extension).
•Wireless XDP Parallel Mode
If a PS has PDN or SDN buttons, Wireless XDP Parallel mode cannot be assigned to that PS (→
20.1.4Wireless XDP Parallel Mode).
•OHCA/Whisper OHCA
A PDN extension cannot receive OHCA or Whisper OHCA, unless the call is made using a corresponding SDN button (→ 12.1.3 OHCA
•Alternate Calling—Ring/Voice
It 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 (→
9.1.13Intercom Call).
[Delayed Ringing]
•The same delayed ringing setting is applied to all PDN buttons on an extension. Delayed ringing can be assigned separately for each SDN button.
•Through system programming, it is possible to select whether caller information (such as Caller ID) is shown 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 while delayed ringing is set.
•SDN buttons can be set to not ring (only flash) for incoming calls. However, this setting is not available for PDN buttons.
•The forward no answer timer starts when a PDN extension starts ringing.
PC Programming Manual References
4.11
4.16
4.17
6.1
6.5
→ Type
→ Parameter Selection (for SDN)
→ Ext. No. / Floating Ext. No. (for SDN)
→ Optional Parameter (Ringing Tone Type Number) (for Loop CO, Single CO, Group CO, ICD Group, SDN)
6.10
6.13
→ Type
→ Parameter Selection (for SDN)
→ Ext. No. / Floating Ext. No. (for SDN)
6.17
→ Type
→ Parameter Selection (for SDN)
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