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DEFINITY Enterprise Communications Server Release 5
Maintenance and Test for R5vs/si
555-230-123
Issue 1
April 1997
Maintenance Object Repair Procedures
Page 10-748HYB-LINE (Hybrid Line)
10
Hybrid Circuit and Conference Circuit Test (#57)
This test checks the amount of reflection from the Hybrid loop around circuitry
and a Conference Test. Please be aware that if no station is connected to the
port being tested, the results of the test are not valid. The Tone-Clock circuit pack
places a 1004-Hz tone on a time slot that the port circuit is listening on. A GPTD
is connected to another time slot that the same port circuit is talking on. The
on-board microprocessor places the port in the loop around mode and the GPTD
measures the level of the reflected signal.
The Conference Test is performed after the Circuit Test. The Conference Circuit
Test verifies that the NPE is able to listen to several test tones and correctly
conference them together. The test is executed in two parts. The first half of the
test checks the operation of the NPE’s first three conference channels. The NPE
is put in the loop around mode and instructed to talk on a selected time slot and
listen to the 1004-Hz tone using the first three Conference Channels. The signal
level and noise level of the conferenced output are then measured using a GPTD
and checked to verify that they are within an acceptable range.
The second half of the Conference Test checks the operation of the NPE’s
remaining four Conference Channels and follows the same procedure as the
preceding paragraph.
Table 10-209. TEST #57 Hybrid Circuit and Conference
Circuit Test
Error
Code
Test
Result Description/ Recommendation
ABORT Could not allocate the necessary system resources to
run this test.
1. Retry the command at one-minute intervals a
maximum of five times.
2. If the test continues to abort, escalate the problem.
Continued on next page