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1.3 Telephone Features
76 Operating Manual
To call an outside party
• 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) Keeping DISA security codes secret.
c) Selecting complex, random codes that cannot be easily guessed.
d) Changing codes regularly.
• If you dial 4 digits or more when dialing an extension number, the call will be disconnected.
When you dial an invalid extension number of 3 digits or less, the call is redirected to the
preprogrammed intercept destinations or disconnected, according to system
programming.
• CO-to-CO Line Call Duration
The length of outside-to-outside (CO-to-CO) line calls may be limited through system
programming.
Both the outside caller and the outside destination will hear a warning tone 15 seconds
before a specified time limit. When the timer expires, the call is disconnected.
In No Security Mode
Dial
DISA
phone number
.
In Trunk Security Mode/All Security Mode
From an Outside Telephone
DISA
phone no.
Off-hook.
Off-hook.
Seize an outside (CO) line before
dialing the outside phone number.
Dial outside phone
number.
outside
phone no.
Seize an outside (CO) line before
dialing the outside phone number.
Dial outside phone
number.
outside
phone no.
R.B.Tone &
DISA OGM
(or one short beep)
R.B.Tone &
DISA OGM
(or one short beep)
Dial
DISA
phone number.
DISA
phone no.
One short beep
Enter
.
Enter
DISA security code
(4
–
10 digits).
DISA security code