
XMU+ Installation and Maintenance Guide rev.07 129
If XMU+ Hardware Failures Occur
1. Check the status of each line card from the Front Panel. See To check line status
on page 123.
2. If the line cards all appear ready after the status check has been completed,
ensure that each line card is properly cabled to the PBX. See Cabling XMU+
Line Cards on page 54.
3. If all line cards are properly cabled to the PBX, proceed to the next
troubleshooting task - To per for m an audio test on page 130.
To verify T1 line card operation and cabling
1. Ensure that each T1 line card is properly cabled to the PBX. See Cabling XMU+
Line Cards on page 54.
2. If all line cards are properly cabled, ensure that the LED indicator on each T1
line card is flashing green.
3. If all LED indicators are flashing green, check the status of each T1 line card
from the Front Panel. See To check line status on page 123.
4. If the T1 line cards all appear ready after the status check has been completed,
perform an audio test. See To perform an audio test on page 130.
5. If the T1 line cards are all operating after the status check has been completed,
ensure the T1 line cards are set correctly. See Chapter 3 of the XMU+
Installation Handbook.
6. If all line cards are set correctly, proceed to the next troubleshooting task - To
perform an audio test.
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