Troubleshooting – Telos ZephyrExpress User Manual
Page 143
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TROUBLESHOOTING
9-1
SECTION 9
TROUBLESHOOTING
First Steps
9-2
GENERAL
9-3
Thinking About Problem Solving
9-3
Diagnostic Aids
9-5
Look into the Lights
9-5
LOOPBACK modes
9-6
Some Error Conditions
9-10
No functionality; the box is totally or partly dead.
9-10
Condition: ISDN Connecting OK, But No Audio
9-11
Condition: No Audio In Both Directions
9-12
Condition: Audio In One Direction Only
9-12
Condition: Audio Distorted
9-12
Condition: Major Echo Action
9-13
Error Messages
9-13
ISDN Problems
9-13
Condition: Can’t Get ISDN Ready Ready Indication
9-13
Intermittent ISDN Problems
9-18
ISDN Cause Phrases/Values
9-18
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