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CDM-625 Advanced Satellite Modem
Front Panel Operation
5.1.1 LED Indicators
The function of the eight front panel LED indicators is as follows:
LED
UNIT STATUS
Tx (Transmit)
TRAFFIC
Rx (Receive)
TRAFFIC
ONLINE
STORED EVENT
REMOTE
EDMAC MODE
TEST MODE
State
Function
Green
No Unit Faults or Traffic Faults.
Orange
No Unit Faults, but a Traffic Fault exists.
Red
A Unit Fault exists (Example: PSU fault).
Green
No Tx Traffic Faults.
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).
Off
An Rx Traffic fault exists (the demod may still be OK).
Green
The Unit is Online and carrying traffic.
The Unit is Offline (Standby) – forced by externally connected 1:1 or 1:N
Off
redundancy system.
There is a Stored Event in the log, which can be viewed from the front panel, or
Orange
retrieved via the remote control interface.
Off
There are no Stored Events.
Orange
The Unit is in Remote Mode – local monitoring is possible, but no local control.
ODU control has been enabled, and there is a communications fault, or there is
Flashing
an ODU status fault.
The Unit is in Local Mode – remote monitoring is possible, but no remote
Off
control.
Framing on, EDMAC on, and unit defined as Slave – local monitoring is
Orange
possible, but no local control.
Off
No EDMAC, EDMAC Master, or Transparent mode is selected.
Orange
A Test Mode is selected (Example: IF Loopback).
Off
There is no Test Mode currently selected.
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
sole exception is the Transmit Traffic relay – it does
not reflect the state of the Tx carrier; it activates
only if a Transmit Traffic Fault exists.
5–2
Revision 13
MN-CDM625
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