Direct Inward System Access (Disa); Disa Security - Samsung DCS-816 Programming Manual

SAMSUNG
DCS-816
•
Receive confirmation tone and hang up.
If the station has an IN/OUT key assigned to it:
•
Press the IN/OUT key. It will light red when the station is in the group.
•
Press the IN/OUT key again. The light is off when the station is out of the group.
NOTE: A station can be in more than one group.

1.9 DIRECT INWARD SYSTEM ACCESS (DISA)

From outside the office, selected individuals can call into the DCS-816 system on special
DISA line(s). A security 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
OR
• access paging resources
• set/reset their external forward database.
DISA allows the use of an incoming line to gain access to system resources for the
purpose of dialling an intercom, accessing a central office (C.O.) line, internal paging or
changing external forward setting.
Individuals who use DISA must have their stations assigned for DISA access and they
must change their station passcodes. The default passcode 1234 cannot be used. To use
DISA:
•
Call for the DISA line from any phone with tone dialling.
•
When you hear the DISA dial tone, dial your security code (the extension number
plus your station passcode). If you want to connect a station, you do not need a
passcode; security codes are needed only for access to trunk lines.
•
If you are allowed access, you will receive system dial tone.
•
Dial any 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 a second intercom call press ∗, receive dial tone and dial another
•
extension number.
•
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.

1.10 DISA SECURITY

A common practice among computer "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 SAMSUNG DCS-816 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 incorrect passcodes and the
disable duration are both programmable. In addition, the DCS-816 system will print a
System Administration and Special Features Guide
1 - 3
February, 1999