Chapter 3. Operation

Port Status LEDs

LED

Color

Indicates that...

Display

 

 

 

 

 

 

 

 

OK

Green

The operation is in the normal mode and no

 

 

errors have been detected.

 

 

 

Test

Yellow

One of the interfaces is operating in a test

 

 

mode. This includes a self-test or a test

 

 

loopback.

 

 

When lighted, also indicates that normal data

 

 

flow is not occurring in at least one of the

 

 

module ports.

 

 

 

Alarm

Red

An alarm condition has been detected. Any

 

 

alarm condition will activate the alarm relay for

 

 

the external alarm device. When the alarm

 

 

condition is no longer valid, the OK LED

 

 

activates (turns on).

 

 

To view an alarm condition, select the active

 

 

alarm menu item.

 

 

 

If the alarm conditions have been corrected, the alarm which caused the activation of the Alarm LED can be viewed under the UNIT HISTORY menu.

Port 1.1 Option Card Monitor Jacks

These are used to connect option cards to the computer.

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TDU 120e User Manual

61202156L2

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Image 52
ADTRAN TDU 120e user manual Port 1.1 Option Card Monitor Jacks, Port Status LEDs