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

Page 235

CSU acceptance testing

Access Manager 2000 User Manual

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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

to specify the far-end network loopbacks and press

39. Choose

the

Activate PLB

option and press

40. Type

to specify the far-end payload loopback (PLB), and press

41. Type

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

Enter