Self-Test - ADTRAN TSU LT User Manual

Chapter 2. Installation

Self-Test

When
A power-up or
commanded self-
test occurs
The self-test is
completed with no
failures detected
A failure is
detected
32
Then
The LCD displays ADTRAN TSU INITIALIZING and the LEDs
illuminate sequentially.
The LCD momentarily displays ALL TESTS PASSED.
It is displayed in the LCD window.
The automatic self-test consists of the following tests:
• Board level tests
• Random access memory (RAM) tests; erasable programmable
read only memory (EPROM) checksum.
• On-board data path. Sending a known test pattern through an
on-board loop.
• Unit level tests
• Front panel LED verification.
• Phase lock loop verify.
© 2002 ADTRAN, Inc.
TSU LT User Manual
61202060L4-1