Led Indicators; Table 6-1. Led Function - Comtech EF Data CDM-760 Installation And Operation Manual

Front Panel Operation
CDM-760 Advanced High-Speed Trunking Modem

6.1.1 LED Indicators

In general, the Alarm relay state reflects the state of the Front Panel LEDs. For example, if the
Unit Status LED is red, the Unit Alarm relay is active, etc. The one exception is the Transmit
Traffic relay. This relay activates only if a Transmit Traffic Fault exists. It does not reflect the
state of the Tx carrier.
LED
UNIT STATUS
Tx TRAFFIC
Rx TRAFFIC
ONLINE
STORED
EVENT
TRANSMITTER
ON
REMOTE
TEST MODE

Table 6-1. LED Function

State Cause
Green No Unit Faults or Traffic (Tx or Rx) Faults.
Amber A Unit, Tx, or Rx Alarm exists.
Red A Unit, Tx or Rx Fault exists (Example: PSU fault).
Green The Tx Traffic path hardware and firmware are not faulted.
Off The Tx Traffic path hardware and/or firmware are faulted.
Green Tx Traffic is passing normally (demodulator and decoder are locked, everything is OK).
An Rx Traffic fault exists (the demodulator may still be OK). A demodulator unlock is a
Off
fault, even though it is likely due to a missing carrier.
The Unit is online and carrying traffic.
Green
The Unit is offline (standby). The offline state is forced by an externally-connected 1:1
Off
or 1:N redundancy system.
There is a Stored Event in the log. View stored events from the front panel, the remote
Amber
control interface, or the CDM-760 HTTP (Web Server) Interface.
Off There are no Stored Events.
Green The Tx IF is ON.
Off The Tx IF is OFF.
The Unit is in Remote Mode. This means that remote monitoring and control is
Amber
available. (Local monitoring and control is always available.)
The Unit is in Local Mode. This means that remote monitoring is possible, but remote
Off
control is not available.
Amber A Test Mode is selected. (Example: IF Loopback)
Off No Test Mode is selected.
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