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TC8619 Rev 1.1 User Manual
5-1
Chapter 5
Troubleshooting
5.1
General
Alarm conditions occur whenever a T1/E1 sync "fault" condition is detected by the
TC8610-1. Under normal operation, PWR, Vcc, and SYNC LEDs should be lit.
5.2
All LEDs are OFF
If no LEDs are lit on the unit, check the DC power supply, connector plug, and/or
the power source. If the problem persists, contact the Technical Support Department
at TC Communications, Inc. @ (949) 852-1973.
5.3
Alarm LED
The ALARM LED will flash when the unit detects any error, such as T1/E1 loss of
frame (no SYNC) or T1/E1 loss of signal (LOS), or in any loopback modes. It will
light solidly to indicate a latched alarm condition.(See 4.2 for Latched alarm)