Comtech EF Data CDM-760, Installation And Operation Manual

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Front Panel Operation Revision 4
CDM-760 Advanced High-Speed Trunking Modem MN-CDM760
6–2
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.
Table 6-1. LED Function
LED State Cause
UNIT STATUS
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).
Tx TRAFFIC
Green The Tx Traffic path hardware and firmware are not faulted.
Off The Tx Traffic path hardware and/or firmware are faulted.
Rx TRAFFIC
Green Tx Traffic is passing normally (demodulator and decoder are locked, everything is OK).
Off
An Rx Traffic fault exists (the demodulator may still be OK). A demodulator unlock is a
fault, even though it is likely due to a missing carrier.
ONLINE
Green The Unit is online and carrying traffic.
Off
The Unit is offline (standby). The offline state is forced by an externally-connected 1:1
or 1:N redundancy system.
STORED
EVENT
Amber There is a Stored Event in the log. View stored events from the front panel, the remote
control interface, or the CDM-760 HTTP (Web Server) Interface.
Off There are no Stored Events.
TRANSMITTER
ON
Green The Tx IF is ON.
Off The Tx IF is OFF.
REMOTE
Amber The Unit is in Remote Mode. This means that remote monitoring and control is
available. (Local monitoring and control is always available.)
Off
The Unit is in Local Mode. This means that remote monitoring is possible, but remote
control is not available.
TEST MODE
Amber A Test Mode is selected. (Example: IF Loopback)
Off No Test Mode is selected.