Technical information

Large Business Communications Systems
4-68 Issue 7 June 2001
 If the call originates outside the system, the incoming trunk equipment
location is displayed. In this case, the customer must call the appropriate
connecting switch.
 The following is displayed for all calls: called number, activating number,
whether the call is active or not, and identification of any additional parties
on the call.
There are several ways to activate the MCT feature. See the DEFINITY ECS
Feature Description book for more information.
Service Observing
When toll fraud is suspected, this feature allows an authorized person, such as a
security supervisor, to monitor actual calls in progress to establish whether or not
an authorized user is on the call. The service observer has the option to listen only
or to listen and talk.
An optional warning tone can be administered (on a per-system basis) to let the
calling party and the user whose call is being observed know that a supervisor is
observing the call. The warning tone is a 440-Hz tone. A two-second burst of this
tone is heard before the supervisor is connected to the call. A half-second burst of
this tone is heard every 12 seconds while a call is being observed. The warning
tone is heard by all parties on the observed call.
NOTE:
The use of service observing may be subject to federal, state, or local laws,
rules, or regulations and may be prohibited pursuant to the laws, rules, or
regulations or require the consent of one or both of the parties to the
conversation. Customers should familiarize themselves with and comply
with all applicable laws, rules, and regulations before using this feature.
For DEFINITY ECS, DEFINITY G1, G3, and System 75:
 Enter change system-parameters features to display the
Features-Related System Parameters screen.
 Enter y in the Service Observing Warning Tone field.
 Enter change station to display the Station screen.
 Enter serv-obsrv in the Feature Button Assignment field.
 Use change cor to display the Class of Restriction screen.
 Enter y in the Service Observing field.
 Enter change station to assign the COR to the station.