User Guide

DEFINITY Enterprise Communications Server Release 5
Maintenance and Test for R5vs/si
555-230-123
Issue 1
April 1997
Routine Maintenance Procedures
Page 5-38System Features
5
■ Analog Tie Trunk Back-to-Back Testing
■ Terminating Trunk Transmission Testing
■ Troubleshooting ISDN-PRI Problems
■ Troubleshooting PRI Endpoint Problems
■ Troubleshooting ISDN-PRI Test Calls
Complete descriptions of each feature are provided in the
DEFINITY Enterprise
Communications Server Release 5.4 Administration and Feature Description
.
Refer to
DEFINITY Communications System Generic 1 and Generic 3 — Console
Operations
, 555-230-700, and DEFINITY Communications System Generic 1 and
Generic 3 Voice Terminal Operations
as required for detailed operating
procedures (does not include Facility Test Calls, Analog Tie Trunk Back-to-Back
Testing, Terminating Trunk Transmission Testing, Troubleshooting ISDN-PRI
Problems, Troubleshooting ISDN-PRI Test Calls, or Troubleshooting ISDN-BRI
Problems described in this chapter.)
Automatic Circuit Assurance
Requires the use of a display-equipped voice terminal (may be nondisplay type if
the Voice Message Retrieval feature is provided) or an attendant console. An
"ACA activate/deactivate" button (one per system) is required on the voice
terminal or attendant console.
Automatic Circuit Assurance (ACA) assists users in identifying possible trunk
malfunctions. The system maintains a record of the performance of individual
trunks relative to short and long holding time calls. The system automatically
initiates a referral call to an attendant console or display-equipped voice terminal
when a possible failure is detected.
Holding time is the elapsed time from when a trunk is accessed to the time a
trunk is released. When ACA is enabled via administration, the system measures
the holding time of each call.
A short holding time limit and a long holding time limit are preset by the System
Manager for each trunk group. The short holding time limit can be from 0 to 160
seconds. The long holding time limit can be from 0 to 10 hours. The measured
holding time for each call is compared to the preset limits for the trunk group
being used.
Measurements are not made on personal CO lines, out-of-service trunks, or
trunks undergoing maintenance testing.