61200051L1-1D
ISU 2x64 Dual Port ISDN Service Unit User Manual
77
Chapter 10
Troubleshooting
When the ISU 2x64 powers up, it performs an internal self test that
takes approximately 10 seconds. At the end of the test, the front
panel momentarily displays
Self Test Passed
.
If Self Test
Fails
If
Self Test Passed
is not displayed, the following steps will verify
whether or not the problem can be fixed locally:
1.
Ensure the ISU 2x64 is receiving power.
2.
Turn off the ISU 2x64 while holding down
0
, then power back
on.
3.
Continue to press down
0
for 15 seconds. This resets all the
internal settings to factory defaults.
4.
If the ISU 2x64 still does not pass self test, call ADTRAN
Technical Support for assistance; see the back of this manual
for phone numbers.
If The ISU 2x64 Does Not Read Ready
When the ISU 2x64 has been set up and connected to a line, but the
front panel does not read
Ready
after a few minutes, use the fol-
lowing troubleshooting procedure:
Summary of Contents for ISU 2x64
Page 14: ...List of Tables viii ISU 2x64 Dual Port ISDN Service Unit User Manual 61200051L1 1D...
Page 44: ...Chapter 6 Cofiguration 30 ISU 2x64 Dual Port ISDN Service Unit User Manual...
Page 86: ...Chapter 8 Quick Setup 72 ISU 2x64 Dual Port ISDN Service Unit User Manual 61200051L1 1D...
Page 102: ...Chapter 11 Specifications 88 ISU 2x64 Dual Port ISDN Service Unit User Manual 61200051L1 1D...
Page 108: ...Appendix A AT Commands 94 ISU 2x64 Dual Port ISDN Service Unit User Manual 61200051L1 1D...
Page 132: ...Appendix D S Register List 118 ISU 2x64 Dual Port ISDN Service Unit User Manual 61200051L1 1D...
Page 158: ...Glossary 144 ISU 2x64 Dual Port ISDN Service Unit User Manual 61200051L1 1D...
Page 164: ...Index 150 ISU 2x64 Dual Port ISDN Service Unit User Manual 61200051L1 1D...
