Troubleshooting - Black Box MT618A-ST-R2 User Manual

T3 BERT
T3/E3
BERT
To activate remote loopback, slide the local line driver's TEST switch to the REM
position.
The remote line driver's LOC indicator turns On and remains lit as long as the
remote loopback is active.

5.3 Troubleshooting

If a problem occurs, refer to Table 5-1 for troubleshooting procedures. Perform
the actions listed under Corrective Measures in the order given in the table until
the problem is corrected. If the problem is still not resolved, call Technical
Support as described in Section 5.4.
Trouble Symptoms
POWER indicator is Off. No AC power.
CHAPTER 5: Diagnostics and Troubleshooting
REM POSITION
COAX
LOCAL FOM
Figure 5-3. Remote loopback illustrated.
Table 5-1. Troubleshooting chart.
Probable Cause
Blown fuse.
FIBER
Local T3
Fiber Optic
Line Driver
T3/E3
Corrective Measures
Verify that the power outlet is
providing the required power.
Make sure that both ends of the
power cable are connected
properly.
Replace with a fuse of the correct
rating.
Remote T3
REMOTE
Fiber Optic
FOM
Line Driver
T3/E3
25