ADTRAN DUAL Nx56/64 1200142L1# - Manual (Page 32)

Chapter 3. Operation
3-10 Nx56/64 (EIA-530) Option Module User Manual 61200054L2-1
3)PORT TEST, Submenu of 4)Test
This menu item is used to activate testing of specific data
ports. It also controls the activation of loopbacks and the
initiation of data test patterns. Test results are shown on
the TSU 100 display.
Operation
To display Figure 3-6 on the TSU 100, place the cursor on
3)PORT TEST , and press Enter or the number 3 key. This
displays the available ports.
Figure 3-6. Port Test Submenu
1.1 Nx56/64
The Nx interface offers the following test functions:
1)LOOPBK: Initiates a loopback.
PRT/LCL: The Nx port activates both a local loop-
back (back toward the DTE) and a port loopback
when either is invoked. See Chapter 1, Introduction,
of the TSU 100 User Manual, for more information.
Remote: 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 on detection of the V.54 code.
Off: The loop is deactivated.
The execution of port tests disrupts normal data flow in the port being
tested.