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3-50 Telephone Features
D 3.2 Telephone Features
Direct Inward System Access (DISA)
Allows an outside caller to access specific extensions, etc., as if the caller is an extension
in the system. A DISA outgoing message gives outside callers assistance, such as listing
the extension numbers or DISA built-in auto attendant (AA) numbers in the system. If the
optional OGM/FAX Detection card is not installed, callers will only hear a beep instead
of a message. This saves you having an operator. A pre-assigned DISA security code may
be necessary, depending on the mode, to access the features directly.
None Security mode: Any caller can make outside or intercom calls without entering a
DISA security code.
Trunk Security mode (default): You need to enter a DISA security code when making
outside calls.
All Security mode: You need to enter a DISA security code when making any call.
You also have the option of calling an extension or ring group using a one digit number
(DISA built-in auto attendant number) via DISA calls.
Calling an extension by following the outgoing message
Any Telephone
Enter the DISA phone number.
Ringback tone and
DISA outgoing message
DISA phone no. extension no.
Enter the extension number.
Ring back tone
In None Security Mode
Enter the DISA
phone number.
Ringback tone
and
DISA outgoing
message
DISA phone no. extension no.
Enter the
extension number.
DISA security code
Enter the pre-assigned
DISA security code
(4 digits).
Ring back
tone
One short
beep
In All Security Mode
Dial .
• You can dial the AA number instead.
• You can dial the AA number instead.