Optical A
Optical B
Loop Back Test
Sync with Remote Unit
Chapter 6 Troubleshooting
All LEDs are "OFF"
6-2
TC8518 Rev 2.2 User Manual
Figure 6-3 TC8518 Optical Port Status
6.2
All LEDs are "OFF"
If no LEDs are lit on the unit, check the power supply, connector plug, and/or the
power source. If the problem persists, contact the Technical Support Department at
TC Communications, Inc.
Warranty Breach Warning Note:
Do not, for any reason, open the TC8518 unit. If you suspect of any problems with
the unit, contact the Technical Support Department at TC Communications, Inc. for
assistance. If the unit is opened without prior authorization from TC
Communications, it will result in the loss of warranty.
6.3
"Alarm Condition" - ALARM LED on the front
panel
When an alarm condition is detected, the "ALARM" LED will flash red, and the dry
contact relay will close or open depending on which contact you use. By default, the
following fault conditions will cause the alarm to be triggered:
1.
Optic signal lost from "RxA" (or "RxB" on dual optic models).
2.
Optic signal is marginal, which causes invalid data packets to be received; the
"Rx-A" (or "Rx-B") LED will be flashing.
3.
The remote unit lost power.
Alarm LED
Alarm Cut-Off Button
Figure 6-4 TC8518 Alarm Status
