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Port Tests
Operation
Port Test Menu Items for 0.1 Nx56/64
61200.129L1-1
The Port Tests menu is used to activate testing of
specific data ports. It controls the activation of
loopbacks and the initiation of data test patterns. Test
results are displayed in the LCD window.
The execution of Port Tests will disrupt normal data flow in
the port being tested.
Follow standard operating procedures to access the
4)TEST menu item.
With the cursor on 3)PORT TESTS, press Enter or
number 3. The unit displays the available ports.
0.1 Nx56/64 is the base Nx interface. It offers the
following test functions:
LOOPBK
This initiates a loopback. The following options are
available:
PRT/LCL
REMOTE
of
OFF
The TSU 120 checks the remote loopback activation by
detecting a proper response from the remote end. While
waiting for the response, the display shows Looping. If
successful, the display changes to Looped Up. If unsuc-
cessful, the display shows Failed.
TSU 120 User Manual
The Nx port activates both a Local
loopback (back toward the DTE) and
a Port loopback when either is
invoked.
The remote loopback causes a V.54
code to be sent to the far end. The
Nx at the far end activates a
PRT/LCL loopback upon detection
the V.54 code.
The loop is deactivated.
Chapter 3. Operation
8 9
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