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ADC Release 3.1 User Manual

Page 325

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1152700

Issue 1

February 2001

Section 2 Operations and Maintenance

Page 2-305

© 2000, ADC Telecommunications, Inc.

DLP-772

Page 1 of 4

LOOBACK TEST

Summary: This procedure instructs the operator in the steps required to perform loopback test
for the various interface types in the system. Loopbacks can be used to isolate network problems
or confirm continuity to customer equipment. A loopback will remain active if the user logs out
of the shelf.

1. From the GUI main screen, select the node that will have the loopback performed on it by

double clicking on it using the left mouse button. The shelf level GUI “Chassis View”
window appears similar to the one shown in

Figure 772-1

.

2. Select the card that will have the loopback performed on it by double clicking on it using

the left mouse button. The card level display will appear whether it is a 622 RIC, 155
SM/MM CRS, T3 CRS, etc. Refer to

Figure 772-2

for an example.

3. Select a port to loopback if applicable.

4. Select the Loopback type of loopback to be performed using the radio buttons shown in the

window (None, Terminal, Facility, and/or Payload). Refer to

Table 772-1

for definitions of

the loopback options for each card type.

Figure 772-3

shows loopback signal

configurations.

5. Select the Apply button at the bottom of the screen to initiate the loopback.

6. Select the None option and Apply again to release the loopback.

Stop! You have completed this procedure.