Verilink Access Manager 2000 (896-502037-001) Product Manual - Manual (Page 235)

CSU acceptance testing
Access Manager 2000 User Manual 5 -111
31. Verify that the STAT LED is lit yellow on the near-end and far-end
CSUs (NCC or TAC), indicating that the test is in progress.
If the STAT LED flashes red and yellow at either end, the test has
failed (CSU is detecting errors in the looped QRSS signal). Check
the T1 circuit between the two CSUs. The source of the failure is
either in the circuit between the CSUs or in either CSU. Replace the
CSUs and re-route the circuit as required, then repeat the acceptance
testing procedure.
32. Select the View Test Status Results option. If the screen
shows some Errors, the test has failed. Check the T1 circuit between
the two CSUs.
33. Press to return to the Select CSU Test Activity screen, then
select the Abort Test in Progress option and press
.
34. Press to return to the On-line: AS2000 screen.
35. Choose the Loopbacks option and press .
36. Type the shelf and plug numbers of the NCC or TAC and press the
function key.
37. Choose the Deactivate Network Loopback (PLB and
LLB) option and press .
38. Type Y to specify the far-end network loopbacks and press
.
39. Choose the Activate PLB option and press .
40. Type Y to specify the far-end payload loopback (PLB), and press
.
41. Type Y to activate the PLB when the loopback warning screen
appears. At the far-end NCC or TAC, also verify that the NET LED
is solid yellow (PLB is activated).
42. Press to return to the On-line: AS2000 screen.
43. Choose the Select Test option and press .
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