Panasonic KX-TDA30 Features Manual page 174

1.16 Optional Device Features
Conditions
WARNING
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.
• Hardware Requirement:
KX-TDA30: An MSG card
KX-TDA100/KX-TDA200/KX-TDA600: An OPB card and MSG card
• 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).
→ [209] DISA Delayed Answer Time
• Call Retry
While hearing a ringback, reorder, or busy tone, retrying the call is possible by pressing " ". System
programming selects whether pressing " " during a trunk-to-trunk conversation returns to the DISA top
menu or sends a DTMF tone.
• DISA Mute Time
It is possible to set the Mute time until the outgoing message (OGM) plays and the PBX starts to receive
the DTMF signalling after the caller reaches the DISA line.
• End of Call Detection
If a call through DISA is routed to a trunk, DISA can be used to detect the end of the call. This function
can be disabled through system programming. If disabled, DISA is released when the trunk-to-trunk
connection is made.
The following three types of tone detection can be enabled for each trunk group to disconnect a trunk-
to-trunk call via DISA.
– Silence Detection
→ [475] DISA Silence Detection
– Continuous Signal Detection
→ [476] DISA Continuous Signal Detection
– Cyclic Signal Detection
→ [477] DISA Cyclic Signal Detection
• Trunk-to-Trunk Call Duration Limitation
For a call between two outside parties, even if end of call detection cannot be performed, the call can
be disconnected by a system timer. (→ 1.10.8 Trunk Call Limitation) If the timer expires, the line will be
disconnected unless the originating caller extends the time by sending any DTMF signalling. The caller
can prolong the call duration within the preprogrammed time period and preprogrammed number of
times.
→ [210] DISA Trunk-to-Trunk Call Prolong Time
• Automatic DISA Activation
DISA can be set through system programming to automatically activate for the following types of trunk-
to-trunk call, to enable detection of the end of the call.
– When a trunk call is forwarded to another trunk
174 Feature Guide