Operation

Table 3-1. System LEDs

Name

Color

Meaning

 

 

 

 

OK

Green

Indicates the current operational state of the DSU/CSU.

 

 

ON :

The DSU/CSU is operational and has power.

 

 

OFF :

The DSU/CSU is performing a power-on self-test

 

 

 

or a system failure has occurred.

 

 

BLINKING : A software download is in progress.

 

 

 

FAIL

Yellow

Indicates a system failure or a self-test.

 

 

ON :

A device error/fault is detected or a reset has just

 

 

 

occurred.

 

 

OFF :

No system failures are detected.

 

 

BLINKING: A self-test is in progress.

 

 

 

TEST

Yellow

A system test is in progress.

 

 

ON :

A loopback or pattern test has been initiated

 

 

 

either locally, by the network, or externally.

 

 

OFF :

No tests are active.

 

 

 

 

Table 3-2. Network Interface LEDs

Name

Color

Meaning

 

 

 

 

SIG

Green

Monitors the signal being received from the network.

 

 

ON :

A recoverable signal is being received from the

 

 

 

network.

 

 

OFF :

The signal cannot be recovered from the network

 

 

 

(a Loss of Signal condition exists).

 

 

 

OOF

Yellow

Monitors Out Of Frame (OOF) conditions on the received network

 

 

signal.

 

 

 

ON :

At least one OOF was detected on the signal during the

 

 

 

sampling period.

 

 

OFF :

No OOFs were detected on the signal during the

 

 

 

sampling period.

 

 

 

ALRM

Yellow

Indicates whether an alarm condition exists on the received network

 

 

signal.

 

 

 

ON :

An alarm condition (LOS, LOF, EER, Yellow, AIS)

 

 

 

exists on the received network signal. Use the System

 

 

 

and Test Status screen to determine the alarm type.

 

 

OFF :

No alarm condition exists on the network interface

 

 

 

signal.

 

 

 

EER

Yellow

Indicates the Excessive Error Rate (EER) has been exceeded on the

 

 

network interface.

 

 

NOTE: This LED is only valid when ESF framing is being used.

 

 

ON :

The EER has been exceeded on the network

 

 

 

interface.

 

 

OFF :

The EER has not been exceeded on the network

 

 

 

interface.

 

 

 

 

3-2

August 2000

3162-A2-GB20-40

Page 28
Image 28
HP 3162 manual System LEDs Name Color Meaning, Network Interface LEDs Name Color Meaning