Chapter 7. Test Menu

ESU 120e

NI CSU

E1

Payload Loopback

Line Loopback

Secondary

Interface

Figure 7-2. Network Loopback Tests

LOCAL LOOPBCK

There are three available choices for setting the local loopback:

Line On

Activates the line loopback

Payload On Activates the payload loopback

No Loopback Deactivates the loopback

Scroll to select a setting and record it by pressing Enter. The unit returns the display of 1)LOCAL LOOPBCK and 2)REMOTE LOOP-

BCK

REMOTE LOOPBCK

FE1 Loopback sends V.54 loopback code in all mapped TSOs toward the network. Far end will respond by initiating a local line loopback.

TEST PATTERN

All Ones

Sends an all ones pattern to the network.

All Zeros

Sends an all zeros pattern to the network.

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ESU 120e User Manual

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ADTRAN ESU 120e user manual Line On Activates the line loopback, Bck, All Ones, All Zeros