Panasonic KX-NS500 Features Manual page 212

2.16.1 Direct Inward System Access (DISA)
None None None None
No Security
B
What is the dialled number?
Extension No./ Trunk Access No.
Floating + Telephone No.
Extension No.
The dialled number is sent to the trunk.
Is the extension
in DND mode?
Yes
Does the
destination
the call?
Yes
The call is established.
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* Feature numbers are available only when the Walking COS feature is used.
212 Feature Guide
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Trunk Security
Is the dialled number
an extension number or
floating extension number?
Yes
C
Feature No.
(Absent Message,
FWD, etc.)
The feature is set.
C
No
Is the extension
busy?
No
E
The call is directed to the extension.
The caller hears a ringback tone.
Does the caller press
No
while hearing a ringback
tone (Call Retry)?
Yes
A
answer
No
(DISA Intercept
time expires)
The call is routed to the
intercept destination.
(DISA Intercept Routing
No Answer)
G
Does the destination
answer the call?
Yes
The call is established.
All Security
No
Is the Walking COS/Verification
Code Entry feature number dialled
for Security Mode Override?
No
*
Other
D
Yes
Is Call Waiting
mode on?
Yes
E
No
(DISA Disconnect
Time after
Intercept expires)
The call is disconnected.
Yes
Is the correct
PIN entered?
No
D
Reorder tone
Does the caller press
while hearing the reorder
(DISA Reorder
tone (Call Retry)?
Tone time
expires)
Yes
A
The call is disconnected.
No
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Yes
B
No