NEC NEAX 2000 IPS Reference Manual page 224

Chapter 11 Open Application Interface (OAI)
Guardian
Guardian provides a level of vigilant phone security that not only monitors occurrences of toll fraud in
the organization, but effectively deters would be toll fraud callers by documenting all long distance
activity. Guardian allows the end user to assign authorization codes for access to certain stations,
detects attempts to place calls that are considered invalid according to assigned privileges and, when
necessary, restricts service to indicated extensions. Through the Guardian Administrator, restrictions
can be exercised on an automatic basis, by time of day, and day of week.
The system is designed to support the management of multiple tenants. Each tenant has its own real-
time call processing, configuration, and databases, but the centralized System Administrator manages
all tenants.
Guardian monitors access to telephone extensions in the system, detects invalid attempts to place
calls, and when necessary, restricts service. In the Guardian system, each telephone user is assigned
an authorization code that corresponds to an individual extension or to a whole group of extensions, as
in a college dormitory or a corporate department. Authorization codes, extensions and groups are
administratively assigned defined time periods during which access is prohibited. Any calls attempted
during prohibited periods are considered invalid and are not processed. An excessive frequency of
invalid calls on any extension results in the Guardian system restricting or disabling the extension. Calls
that are attempted either on extensions or with authorization codes that are already disabled are also
considered invalid. There are three ways the telephone access is restricted or disabled:
System Disable - Guardian monitors real-time processing for frequency of invalid call attempts on any
extension that exceeds the maximum frequency. Guardian than automatically and temporarily disables
the extension used in the invalid call attempts. Both the maximum frequency and the length of time that
the extension is temporarily disabled are configured limits specified by extension group, however, the
administrator is provided with the ability to override a System Disable at any time
Administrative Disable - Guardian enables the administrator to disable any extension,
authorization code, or group of extension in either of two ways:
Routinely - The disablement of any or all extensions, authorization codes, or groups of
extensions during specified, regularly occurring time periods, such as weekend or the late night
hours.
Unconditionally - The disablement of an extension, authorization code, or group at any time, for
as long as desired.
Guardian logs information about invalid call attempts and modifications to the status of
extensions, authorization codes, and groups. From this log and from the databases, Guardian
than provides a variety of reports in support of system management.
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