Light Pattern PDN Button Status SDN Button Status
Green on The extension is on a call using the PDN
button.
The extension is on a call using the SDN but-
ton.
Slow green
flashing
A call is on hold using the PDN button. A call is on hold using the SDN button.
Moderate
green flashing
• A call on a PDN button is on Exclusive
Call Hold or consultation hold.
• The
PDN extension is adding a mem-
ber 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 exten-
sion.
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 Con-
ference.
• receiving Hold Recall or automatic
callback ringing.
The corresponding PDN extension or anoth-
er 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 Confer-
ence.
• receiving an incoming call directed only
to the PDN extension (e.g., callback ring-
ing).
Slow red flash-
ing
A call is on hold by a corresponding SDN
extension.
A call is on hold by the corresponding PDN
extension or
another corresponding SDN ex-
tension.
Rapid red
flashing
A call is arriving at an Incoming Call Dis-
tribution (ICD) group in Ring Distribution
method that
this extension is a member of.
The corresponding PDN extension is receiv-
ing 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.
116 Feature Guide
1.7.1 Primary Directory Number (PDN)/Secondary Directory Number (SDN) Extension
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