Details about this can be found on user guide of PTP820S/C. (Page 6320
Radio LED
The Link LED is a three-color LED that indicates the status of the radio link:
- Off – The radio is off.
- Green - The power is on, and all carriers are operational (up).
- Yellow - A signal degrade condition exists in at least one carrier.
- Red - A loss of frame (LOF) or excessive BER condition exists in at least one carrier.
Status LED
The Status LED is a three-color LED that indicates the status of the radio link:
- Off – The power is off.
- Green - The power is on, and no alarms are raised on the motherboard.
- Yellow - The power is on, and one or more minor alarms or warnings are raised on the motherboard.
- Red - The power is on, and one or more major or critical alarms are raised on the motherboard.
Protection LED
The Protection LED is a three-color LED that operates in a protected configuration to indicate the protection status:
- Red – A protection alarm exists (cable disconnected, etc.)
- Yellow - Protection is enabled, and the unit is in standby mode.
- Green - Protection is enabled, and the unit is in active mode.
- Off - Protection is not enabled.
Regards
Allen