Instruction manual

Communication Manager, MultiVantage Software,
DEFINITY ECS, DEFINITY communications systems,
System 75, and System 85
Issue 9 May 2003
8-11
ARS measurement selection
The ARS Measurement Selection feature can monitor up to 20 routing patterns
(25 for G3 and later for traffic flow and usage.
For Communication Manager and MultiVantage™ Software:
■ Use change meas-selection route-pattern to choose the routing patterns
you want to track.
■ Use list measurements route-pattern followed by the timeframe
(yesterday, today, or last-hour) to review the measurements.
For DEFINITY ECS, DEFINITY G1, G3, and System 75:
■ Use change ars meas-selection to choose the routing patterns you want
to track.
■ Use list measurements route-pattern followed by the timeframe
(yesterday, today, or last-hour) to review the measurements.
For DEFINITY G2, use Monitor I to perform the same function.
Automatic circuit assurance
This monitoring technique detects a number of short holding time calls or a single
long holding time call, both of which may indicate hacker activity. Long holding
times on trunk-to-trunk calls can be a warning sign. The ACA feature allows you to
establish time limit thresholds defining what is considered a short holding time and
a long holding time. When a violation occurs, a designated station is visually
notified.
When a notification occurs, determine if the call is still active. If toll fraud is
suspected (for example, aca-short or aca-long is displayed on the designated
phone), use the busy verification feature (see ‘‘Busy verification’’ on page 8-12
) to
monitor the call in progress.
With remote access, when hacker activity is present, there is usually a burst of
short holding times as the hacker attempts to break the barrier code or
authorization code protection, or long holding time calls after the hacker is
successful. An ACA alarm on a remote access trunk should be considered a
potential threat and investigated immediately. If the call is answered by an
automated attendant, a hacker may be attempting to gain access to the system
facilities using TACs.
For Communication Manager, MultiVantage™ Software, DEFINITY ECS,
DEFINITY G1, G3, and System 75:
■ Use change system-parameters features to display the
Features-Related System Parameters screen.
■ Enter y in the Automatic Circuit Assurance (ACA) Enabled field.