User`s guide

Section 360−381−S02

7.1.5. Loopback of DSU-DP Card

Use the following steps to perform the DSU-DP card loopback.

Step Action System Response

1. Select Loopback Test " Loopback of DSU-DP

Card

Opens the DSU Loopback/Release dialog box

(see Figure 24).

2. Select the the channel you want the loopback test

run on.

3. Select the loopback type.

4. Select the loopback location (near- or far-end).

5. Set the test time. This defines the duration of the

test.

6. Select 2047 Pattern enable or disable. If enabled, generates a 2047 pattern to be looped

back for analysis.

7. Select Loopback Initiates the loopback or release. If no time slot is

assigned to the chassis slot, loopback cannot be

enabled.

Figure 24. DSU-DP Card Loopback

Note: DSU-DP far and near end loopback generators do not operate when the ICB is equipped with a Secon-

dary T1 module in Protect mode.