Chapter 7. Test Menu
7-8
TDU 120e User Manual
61202156L2-1
Run Self-Test
The self-test checks the integrity of the internal operation
of the electronic components by performing memory tests
and by sending and verifying data test patterns through
all internal interfaces. Although actual user data cannot
be passed during these tests, the self- test can be run with
the network and DTE interfaces in place and will not dis-
turb any external interface.
The memory portion of the self-test automatically exe-
cutes upon power-up.
A full self-test can be commanded from terminal/telnet
menu or from T-Watch PRO.
In addition to the specified self-tests, background tests are
also run on various parts of the internal electronics. These
run during normal operation to confirm continued cor-
rect functioning.
This menu selection is used to execute a full internal self-
test. The results of the self-tests are displayed on the ter-
minal. Upon invoking the command, the terminal dis-
plays System Self-Test and the Test LEDs are illuminated.
Test failures are displayed on the terminal.
The self-test consists of the following:
Test Name
What it does...
Board level tests Each of the TDU 120e boards contains an on-
board processor which executes the following
series of tests checking the circuitry on the
board:
• RAM tests; EPROM checksum
• DS0 map tests
• On-board data path (sending a known test
pattern through an on-board loop)
Unit level tests
Unit level tests consist of:
• Front panel LED verification
• Phase Lock Loop verification
• Board-to-board interface test
Summary of Contents for 1202155L1
Page 1: ...TDU 120e User Manual Part Number 1202156L2 1202155L2 September 2001 61202156L2 1C...
Page 20: ...Table of Contents xx TDU 120e User Manual 61202156L2 1...
Page 22: ...List of Figures xxii TDU 120e User Manual 61202156L2 1...
Page 24: ...List of Tables xxiv TDU 120e User Manual 612022156L2 1...
Page 42: ...Chapter 2 Installation 2 12 TDU 120e User Manual 61202156L2 1...
Page 92: ...Chapter 5 Configuration Menu 5 30 TDU 120e User Manual 61202156L2 1...
Page 108: ...Chapter 7 Test Menu 7 12 TDU 120e User Manual 61202156L2 1...
Page 116: ...Chapter 8 Remote Management Menus 8 8 TDU 120e User Manual 61202156L2 1A...
Page 124: ...Appendix A Understanding SNMP A 8 TDU 120e User Manual 61202156L2 1...