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HYB-LINE (Hybrid Line)
Issue 5 October 2002
1245
555-233-119
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 290. 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 1-minute intervals a maximum of 5 times.
1000 ABORT System resources required to run this test are not available. The port may
be busy with a valid call. Use the display port PCSSpp command to
determine the station extension number of the port. Use the status station
command to determine the service state of the port. If the service state
indicates that the port is in use, then the port is unavailable for certain tests.
You must wait until the port is idle before retesting. Attendants are always in
use (off-hook) if the handset is plugged in and the port is not busied out.
1. If the port status is idle, then retry the command at 1-minute intervals a
maximum of 5 times.
1001 ABORT Could not allocate the necessary system resources to run this test. This
could be due to a failure to seize the port.
1. Retry the command at 1-minute intervals a maximum of 5 times.
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