beautypg.com

1 led indicators – Comtech EF Data CDM-760 User Manual

Page 88

background image

Front Panel Operation

Revision 2

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.