Light Pattern PDN Button Status SDN Button Status
Moderate
green flashing
•A call on a PDN button is on Exclusive
Call Hold or consultation hold.
•The PDN extension is adding a
member to a conference or using the
line for an Unattended Conference, on
a PDN button.
•A call answered using the SDN button is
on Exclusive Call Hold or consultation
hold.
•The SDN extension is adding a member
to a conference, or using the line for an
Unattended Conference.
Rapid green
flashing
An incoming call is arriving at this
extension.
Receiving Hold Recall or automatic callback
ringing from a call answered using the SDN
button.
Red on A corresponding SDN extension is:
•on a call.
•holding the line using Exclusive Call
Hold or consultation hold.
•adding a member to a conference.
•using the line for an Unattended
Conference.
•receiving Hold Recall or automatic
callback ringing.
The corresponding PDN extension or
another corresponding SDN extension is:
•on a call.
•holding the line using Exclusive Call Hold
or consultation hold.
•adding a member to a conference.
•using the line for an Unattended
Conference.
•receiving an incoming call directed only
to the PDN extension (e.g., callback
ringing).
Slow red
flashing
A call is on hold by a corresponding SDN
extension.
A call is on hold by the corresponding PDN
extension or another corresponding SDN
extension.
Rapid red
flashing
A call is arriving at an Incoming Call
Distribution (ICD) group in Ring
Distribution method that this extension is
a member of.
The corresponding PDN extension is
receiving an incoming call.
When multiple calls are on a PDN extension, the LED pattern that appears on the corresponding SDN buttons
is displayed according to the following priority:
Receiving an incoming call ® holding a call ® on a call ® idle
For example, if a PDN extension receives an incoming call while on a call, the LEDs on the corresponding
SDN extensions will show the incoming call.
However, if an SDN extension is handling a call using the SDN button (e.g., on a call, has a call on hold, etc.),
the status of that call will be displayed on the SDN button, regardless of the call status of the PDN extension.
Example of a Secretary Handling Calls for Multiple Bosses
The following example shows the LED patterns of the PDN and SDN buttons of each extension and how calls
can be handled.
1. A Call From 111-1111 Arrives at Ext. 101
(Rapid Red
Flashing)
SDN buttons
(Off)
(Ext. 103)
(Off)
(Ext. 102)
Ext. 101 (Boss)
PDN buttons
(Off)
(Off)
(Rapid Green
Flashing)
SDN buttons
(Off)
(Ext. 103)
(Ext. 101)
Ext. 102 (Boss)
PDN buttons
(Off)
(Off)
(Off)
PDN buttons
(Off)
(Off)
(Off)
Ext. 103 (Secretary)
SDN buttons
(Off)
(Ext. 102)
(Rapid Red
Flashing)
(Ext. 101)
214 Feature Manual Document Version 2008-11
13.1.7 PDN (Primary Directory Number)/SDN (Secondary Directory Number) Extension