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2.9.1 Primary Directory Number (PDN)/Secondary Directory Number (SDN) Extension
and wireless devices will be ignored. Only the extension number of the user (=main device) can be
specified as additional information (extension number) when configuring the SDN key settings.
There are cases where devices other than the main device are configured when deleting a user or
changing the device settings of the User Container, however, in such cases the SDN button will not
function.
•
No PDN status display
•
No incoming call display to the SDN button possible
•
Unable to answer by pressing the SDN button
•
Unable to call by pressing the SDN button
•
If none of an extension's PDN buttons are idle, DSS buttons of other extensions registered to the PDN
extension will turn on red.
•
Ring Tone Pattern
Through system programming, each extension can set ring tone patterns for PDN buttons. Ring tone
patterns can be assigned separately for each SDN button.
•
Outgoing Line Preference
When "PDN" is selected as the outgoing line preference, outgoing calls will originate on the first available
PDN button (→ 2.5.5.2 Line Preference—Outgoing).
•
Incoming Line Preference
Through system programming, it is possible for only incoming calls arriving at PDN buttons to be
answered simply by going off-hook, by selecting "PDN" as the incoming line preference (→ 2.4.2 Line
Preference—Incoming). This prohibits calls that arrive on non-PDN buttons (e.g., an SDN button) to be
answered when going off-hook.
•
OHCA/Whisper OHCA
A PDN extension cannot receive OHCA or Whisper OHCA unless the call is made using a corresponding
SDN button (→ 2.10.4.3 Off-hook Call Announcement (OHCA), → 2.10.4.4 Whisper 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
(→ 2.5.3 Intercom Call).
•
Through system programming, it is possible to force an extension to become idle (the SP-PHONE button
light will turn off) when a speakerphone call using a PDN/SDN button is put on hold using CTI.
[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
10.7.1 PBX Configuration—[2-7-1] System—Class of Service—COS Settings—PDN/SDN
10.8.3 PBX Configuration—[2-8-3] System—Ring Tone Patterns—Call from Others—Extension—Ring Tone
Pattern Plan1—8
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