Samsung OfficeServ 100
System Administration Guide
5
DIRECT INWARD SYSTEM ACCESS
(DISA)
From outside the office, selected individuals can call into the system on special DISA line(s). A se-
curity code must be entered to gain access. Once these individuals are in the system, they can:
•
make outside calls using the office lines;
•
call stations within the system;
•
access paging resources;
•
set/reset external forwarding.
DISA service must be programmed on your system and users must change their station passcodes
from the default value (‘1234’). To use DISA:
1. Call in on a DISA line from any phone with tone dialling.
2. When you hear the DISA dial tone, dial your security code (the extension number plus your sta-
tion passcode).
3. If you are allowed access, you will receive system dial tone.
4. Dial a line access code, receive outside dial tone and then dial a telephone number.
OR
Dial any extension number to call a station in the system. (To make another internal call when
the current call is completed, press
¿
, receive dial tone and dial another extension number.)
5. Press
#
and hang up when finished.
Note:
•
Outgoing DISA calls are controlled by the dialling class of the station identified by the security code.
The DISA line must have disconnect supervision from the central office. Insist that this condition be
verified by your service company.
•
To change keyset passcodes, see your
Samsung Keyset / Phone User Guide
.
DISA SECURITY
A common practice among hackers is to repeatedly dial a known DISA access number (usually with
a computer) and try a different passcode each time. The hacker hopes to eventually chance upon
the correct passcode and thus gain access to your system. The system’s security feature will count
the number of sequential incorrect passcode attempts, and if a certain number is reached, DISA will
be disabled and the system will alert designated stations. The number of attempts allowed and the
time for which DISA calls are disabled are both programmable. In addition, the system will print a
Station Message Detail Recording (SMDR) report each time an incorrect passcode is entered (pro-
vided, of course, you have an SMDR printer installed on your system).
To clear the DISA alarm:
1. Lift the handset and dial the access code
58
.
2. Enter the DISA alarm passcode (‘5678’ by default—refer to MMC 202).
3. Replace the handset.
WARNING
As it is impossible to prevent unauthorised access to your telephone system by hackers, we
suggest that you do not turn the DISA feature on unless you intend to use it. If you do use
this feature, it is good practice to frequently change access passcodes and periodically re-
view your telephone records for unauthorised use.
