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MET-LINE (MET Line)
Issue 1 June 2005 1571
MET Circuit and Conference Circuit Test (#57)
This test checks two different port circuit functions. The Hybrid Circuit test performs an analog
reflective loop-around measurement on the port’s hybrid circuitry. The Conference Circuit test
performs a conference test on the port’s NPE.
For Hybrid Circuit test results to be valid, a voice terminal must be connected to the port being
tested. The test instructs the on-board microprocessor to put the port in analog reflective
loop-around mode. The Tone-Clock circuit pack supplies a 1004-Hz tone to the port’s listen time
slot and a GPTD (General-Purpose Tone Detector) measures the level of the reflected signal
appearing on port’s talk time slot.
The Conference test is performed only if the Hybrid Circuit test passes. The Conference Circuit
test verifies that the Network Processing Element (NPE) can correctly conference several test
tones together. The test is executed in two parts. The first half of the test verifies operation of
the NPE’s first three conference channels, and the second half verifies the NPE’s remaining
four conference channels. The test puts the NPE in loop-around mode and instructs it to talk on
a specified time slot while listening to a 1004-Hz tone using the Conference Channels. A GPTD
then measures the signal and noise levels of the conferenced output and reports whether or not
these fall within a specified acceptable range.
0NO
BOARD
The test could not relate the internal ID to the port (no board). This could
be due to incorrect translations, no board is inserted, an incorrect board is
inserted, or an insane board is inserted.
1. Check to ensure that the board translations are correct. Use list
config and resolve any problems that are found.
2. If the board was found to be inserted correctly, enter busyout
board location.
3. Enter the reset board location command.
4. Enter the release board location command.
5. Enter test board location long.
This should re-establish the linkage between the internal ID and the port.
If this is not the case, check to ensure that there is a valid board inserted.
Table 580: Test #56 MFAT Electronic Power Feed Test (continued)
Error
Code
Test
Result
Description / Recommendation
2 of 2