Technical information

Large Business Communications Systems
4-24 Issue 7 June 2001
Station Security Codes (SSCs)
Station Security Codes (SSCs) are used with two features: Personal Station
Access and Extended User Administration of Redirected Calls. Starting with
DEFINITY ECS Release 5, the Security Violations Status report shows the 16
most recent invalid attempts of SSC use. The report is refreshed every 16
seconds, and it shows the date, time, port/extension, FAC, and dialed digits for
each invalid attempt. Enter the monitor security-violations
station-security-codes command at the prompt to access this report.
SSC violations are summarized in the Security Violations Summary report. Enter
the list measurements security-violations summary command to access this
report.
SSC input entry has a pre-administered security capability. For details, refer to the
‘‘Personal Station Access (PSA)’’ section in this chapter.
Finally, SSCs should be changed about once every six months.
Personal Station Access (PSA)
The Personal Station Access (PSA) feature allows multiple users to work at the
same voice terminal location at different times. PSA provides capabilities that are
similar to TTI, but for a single station. This feature is available starting with
DEFINITY ECS Release 5.
Each PSA user must have a Station Security Code (SSC), which includes as
many as eight digits.
The feature has a pre-administered security feature regarding input entry by the
user. Once the user enters his or her extension at the appropriate time, a “no
response” feedback is provided whether or not the entered extension is valid. For
an invalid extension, the system simply waits, without responding, until it reaches
a timeout threshold. As such, an unauthorized user does not know that input entry
is the cause of the error. The same security feature is in effect whenever the user
enters the SSC at the appropriate time.
The dissociate function within PSA allows a user to restrict the features available
to a voice terminal. Whenever a terminal is dissociated via PSA, it can be used
only to call an attendant, accept a TTI merge request, or accept a PSA associate
request.