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CDM-600 Satellite Modem Revision 7
Front Panel Operation MN/CDM600.IOM
6–2
The behavior of the front panel LEDs is described below in Table 6-1.
Table 6-1. Front Panel LED Indicators
LED Color Condition
Red A Unit Fault exists (Example: PSU fault)
Orange No Unit Faults, but a Traffic Fault exists
Unit
Status
Green No Unit Faults, or Traffic Faults
Green No Tx Traffic Faults Transmit
Traffic
Off A Tx Traffic fault exists OR the Tx Carrier is in OFF state
Green No Rx Traffic Faults (demod and Viterbi decoder are locked, everything is OK) Receive
Traffic
Off An Rx Traffic fault exists (the demod may still be OK)
Green The Unit is On Line, and carrying traffic
On line
Off
The Unit is Off Line (standby) - forced by externally connected 1:1 or 1:N
redundancy system
Orange
There is a Stored Event in the log, which can be viewed from the front panel, or
retrieved via the remote control interface
Stored Event
Off There are no Stored Events
Orange The Unit is in Remote Mode - local monitoring is possible, but no local control
Off The Unit is in Local Mode - remote monitoring is possible, but no remote control
Remote
Flashing
ODU control has been enabled, and there is a communications fault, or there is a
ODU status fault
Orange
Framing on, EDMAC on, and unit defined as Slave - local monitoring is possible,
but no local control
EDMAC Mode
Off Either no EDMAC, EDMAC Master, or Transparent mode is selected
Orange A Test Mode is selected (Example: IF Loopback)
Test Mode
Off There is no Test Mode currently selected
IMPORTANT
In general, the Alarm relay state will reflect the state of the Front Panel LEDs. For
instance, if the Unit Status LED is red, the Unit Alarm relay will be active, etc. The
one exception is the Transmit Traffic relay. This will only be activated if a Transmit
Traffic Fault exists – it does not reflect the state of the TX carrier.