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2.16.1 Direct Inward System Access (DISA)
Intercept Routing
No
(Busy Tone /
DND Tone
Continuation
time expires)
The call is disconnected.
The call is routed to
the intercept destination.
(Intercept Routing DND)
G
Conditions
CAUTION
There is a risk that fraudulent telephone calls will be made using the Trunk-to-Trunk Call feature of
DISA.
The cost of such calls will be billed to the owner/renter of the PBX.
To protect the PBX from this kind of fraudulent use, we strongly recommend:
a.
Enabling DISA security (Trunk Security or All Security).
b.
Keeping passwords (verification code PINs/extension PINs) secret.
c.
Selecting complex, random PINs that cannot be easily guessed.
d.
Changing PINs regularly.
•
An Activation Key (KX-NSUN001/KX-NSUN010/KX-NSUN050/KX-NSUN100/KX-NSUN500,
KX-NSUM001/KX-NSUM010/KX-NSUM050/KX-NSUM100/KX-NSUM500 or any of the following models
KX-NSUA001/KX-NSUA010/KX-NSUA050/KX-NSUA100/KX-NSUA500) is required to use this feature.
•
DISA Delayed Answer Time
It is possible to set the Delayed Answer time so that the caller will hear a ringback tone within a
preprogrammed time period first before hearing an outgoing message (OGM).
→
10.3 PBX Configuration—[2-3] System—Timers & Counters—DISA / Door / Reminder / U. Conf—DISA
—Delayed Answer Timer
•
Call Retry
170
Feature Manual
Continued from previous page
What method is assigned
for DISA Intercept
Routing DND?
Busy tone
Does the caller
press
while hearing a busy
tone (Call Retry)?
Yes
The message for
the DND mode is
sent to the caller.
A
Continued from previous page
Is an Intercept
Routing Busy destination
OGM
Is a DISA Busy
Message assigned?
The message for
busy is sent to the
caller.
F
The call is disconnected.
Yes
assigned?
The call is routed to
the intercept destination.
No
(Intercept Routing Busy)
No
Yes
Busy tone
F
Does the caller
No
press
while hearing a busy
tone (Call Retry)?
(Busy Tone /
DND Tone
Continuation
time expires)
Yes
A
G
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