ADTRAN TDU 120e user manual Power UP Testing, Self-Test

Models: TDU 120e

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Chapter 2. Installation

POWER UP TESTING

 

 

When shipped from the factory, the TDU 120e is set to fac-

 

 

tory default conditions. At the first application of power,

 

 

the unit automatically executes a memory self-test. A full

 

 

self-test can be run from the terminal. A passcode and

 

 

unit ID may be set using the UTILITY menu. See page 6-3.

Self-Test

 

 

 

 

 

 

 

 

When...

 

Then...

 

 

 

 

 

 

Initiating a self-test

 

The terminal displays System Self-test Now

 

 

 

 

Testing and Memory Test Now Testing. The test

 

 

 

 

LEDs are illuminated.

 

 

 

 

 

The self-test is completed

All LEDs go back to their normal state. The terminal

 

 

 

 

momentarily displays System Self-test Tests

 

 

 

 

passed.

 

 

 

 

 

 

A failure is detected

 

A list of failures is displayed on the terminal.

 

 

 

 

 

 

 

 

The full self-test procedure (invoked from the terminal or

 

 

T-Watch PRO) consists of the following tests:

 

 

 

 

Type of Test

 

 

Explanation

 

 

 

Board level tests

 

The TDU 120e contains an on-board processor which

 

 

executes a series of tests checking the circuitry on the

 

 

board.

 

 

RAM and EPROM tests

 

 

Verify on-board circuitry

 

 

 

Unit level tests

 

Front panel LED verification

 

 

Board-to-board interface test

 

 

A test pattern is sent from the controller through a loopback

 

 

on all other boards and checked on the controller. This

 

 

verifies the data path, clocks, and control signals for the

 

 

entire chassis.

 

 

 

 

 

2-8

TDU 120e User Manual

61202156L2-1

Page 38
Image 38
ADTRAN TDU 120e user manual Power UP Testing, Self-Test