Black Box MT1000A-13-R3, Quick Start Manual

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Chapter 5 Testing and Diagnostics MT1000A Installation and Operation Manual
5-2 Troubleshooting
Table 5-1. Troubleshooting Chart (Cont.)
Trouble Symptoms Probable Cause Corrective Measures
The SYNC LOSS
indicator of the fiber
optic link lights.
External problem Activate the local loopback on the MT1000A. Check
that the SYNC LOSS and AIS indicators of the fiber optic
link in use turn OFF.
If the indicators turn off, check the fiber optic interface
connections, the fiber optic transmission path to the
remote unit, and the remote unit.
Defective MT1000A Replace the MT1000A.
The AIS indicator of the
fiber optic link lights.
1. External The remote equipment connected to the fiber optic link
of the MT1000A sends an AIS sequence. Check the
remote equipment.
2. Defective
MT1000A
Activate the local loopback on the MT1000A. Check
that the SYNC LOSS and AIS indicators of the fiber optic
link in use turn OFF. If one of the indicators remains lit,
replace the MT1000A.
None of the units
connected to a local
MT1000A receive the
remote equipment.
External problem Activate the local loopback on the MT1000A. Check
that all the SYNC LOSS and AIS indicators turn OFF, and
that the equipment connected to the local tributaries
receive their own transmissions. If the indicators turn
OFF, the problem is external. Troubleshoot the remote
unit, and the fiber optic transmission path.
Defective
MT1000A
Replace the MT1000A.
Only one of the units
connected to a local
MT1000A does not
receive the remote
equipment.
1. Equipment problem Check the equipment connected to the local tributary,
and its cable connections. Check the remote tributary
equipment.
2. Defective MT1000A Activate the fiber optic link local loopback in the local
MT1000A. Check that any previously lit alarm indicators
related to the tributary turn OFF.
If the indicator turns OFF, the problem is external; if the
indicator remains lit, replace the MT1000A.
No menus are available. Incomplete downloading
of new FLASH version
Turn the MT1000A ON and proceed to download the
new FLASH version again.