User manual

Chapter 7. Test Menu
61202156L1-1 TDU 120e User Manual 7-7
To run an end-to-end test on Fractional DSOs, complete the
following steps:
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 disturb any
external interface.
The memory portion of the self-test automatically executes
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
run on various parts of the internal electronics. These run
during normal operation to confirm continued correct
functioning.
This menu selection is used to execute a full internal self-test.
The results of the self-tests are displayed on the terminal.
Step Action
1
Set for Map B the TST in the same DS0 as
used by Map A to receive data from an
Nx56/64 port
2
Loop the far end using a V.54 loopback
code on the Nx56/64 port.
A single DS0 can be used for continuous testing while other DS0s
are passing normal data. This will also provide an end to end check
on the entire link. Set each end to send QRSS in TST DS0s (using
1 DS0) and occasionally view the results on the Pattern Result
menu selection.