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Chapter 4. Example Operations
Test the Nx56/64 Interface
110
The Nx56/64 interface is tested by essentially the same
method as the Remote Loopback is tested.
From the 4)TEST Main menu scroll or use number 3 to
select 3)PORT TEST. Enter activates the PORT TEST
menu. Scroll to select the Port to test and Enter to
activate. (For this example the 0.1 Nx56/64 is used.)
The unit displays a menu with the cursor on
1)LOOPBK. Scroll to select Remote and Enter to
activate. The display shows Looping while sending a
V.54 loop-up code to the far end and waiting for a
loop-up verification.
If no verification is received after five seconds, the
display reads Failed.
Upon receiving verification of proper loopup, start the
511 pattern by selecting 511 PATTERN using menu
item 2)511 PATT:ON.
The results (which are shown under menu item
4)PATTERN RESULTS) are a display of a count of the
number of seconds with error since the test was
initiated and pattern sync was achieved. The Clear
key
(shift + 9) is used to clear errored seconds count.
For the 511 pattern, the TSU 120 provides a count of the
number of seconds which contained errors, not an actual
error count.
Test Termination
Select 511 Pattern Off and deactivate the Remote
Loopback by selecting Off for the Loopbk menu item
number 1.
TSU 120 User Manual
61200.129L1-1
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