Panasonic KX-TDA50

1.15 Optional Device Features
122 Feature Guide
Conditions
WARNING
There is a risk that fraudulent telephone calls will be made using the CO-to-CO Line 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 (CO Line Security or All Security).
b) Keeping passwords (verified code PINs/extension PINs) secret.
c) Selecting complex, random PINs that cannot be easily guessed.
d) Changing PINs regularly.
• Hardware Requirement: An MSG card.
• DISA Delayed Answer Time
It is possible to set the DISA Delayed Answer time (→ DISA Delayed Answer Time [209]) so that the
caller will hear a ringback tone for a preprogrammed length of time before hearing an OGM.
• DISA Mute Time
Certain DTMF signals, such as Caller ID information, may be sent from the telephone company when
a call is first connected. Because these signals may interfere with DISA, the PBX can be programmed
to ignore DTMF signals for a specified amount of time (DISA Mute & OGM Start Time after Answering)
after a call is connected. After the DISA Mute time passes, DTMF signals are recognized by the PBX
and the OGM begins playing.
• SMDR
The following are logged by Station Message Detail Recording (SMDR) (→ 1.21.1 Station Message
Detail Recording (SMDR)) for DISA calls:
a) The floating extension number of the DISA OGM.
b) The destination of the DISA call. (Extension number for internal calls, telephone number for CO-
to-CO line calls.)
c) The extension number used for Walking COS through DISA, or the verified code used for Verified
Code Entry through DISA.
• Tone Detection
Three different types of tone detection can be used to disconnect a CO-to-CO line call via DISA. Each
tone detection type can be enabled or disabled for each CO line group.
– Silence Detection (→ DISA Silence Detection [475])
– Continuous Signal Detection (→ DISA Continuous Signal Detection [476])
– Cyclic Signal Detection (→ DISA Cyclic Signal Detection [477])
• DISA Reorder Tone Time
If a caller makes an invalid selection, a reorder tone will be sent to the caller. The caller can retry the
call by pressing " ", otherwise the call will be disconnected after a preprogrammed length of time
(DISA Reorder Tone time).
• Call Deny
Each COS can be programmed to accept or deny incoming DISA calls. A DISA call will be accepted or
denied by an extension based on the COS of the extension.
• When using Walking COS or Verified Code Entry, a PIN must be entered. If the PIN is entered
incorrectly three times when using DISA, the line will be disconnected. If an incorrect PIN is entered a
preprogrammed number of times, the PIN will be locked. Only an extension assigned as a manager
can unlock a PIN, after which it will be reset.