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3.3 PT Programming
250 Feature Guide
No Security: Allows the caller to make either an outside (CO) line or intercom call without entering a
DISA security code.
Feature & Programming References
1.15.6 Direct Inward System Access (DISA)
DISA Security Code [512]
WARNING
There is a risk that fraudulent telephone calls will be made using the Outside-to-Outside (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 (Trunk Security or All Security).
b) Maintaining the secrecy of passwords.
c) Selecting passwords that are complex and random, so that they cannot be easily guessed.
d) Changing passwords regularly.
Notes
• This setting is required if "Trunk Security" or "All Security" is selected in DISA Security Mode [511].
• Each DISA security code should be unique.
• The number of digits for DISA security codes is selected in DISA Security Code Digits [530].
Feature & Programming References
1.15.6 Direct Inward System Access (DISA)
DISA Security Mode [511]
Cyclic Tone Detection [513]
Feature & Programming References
1.15.6 Direct Inward System Access (DISA)
5 1 2
NEXT
code no. security code
STORE END
(1
…
4) 4
…
10 digits
(0
…
9)
SELECT
NEXT PREV
or
To continue
To continue
5 1 3
NEXT
SELECT
STORE END
(Disable/
2/3/4 times)