Digital Link DL600E E1 Uživatelská příručka stáhnout pdf (Strana 109)

Diagnosing the DL600E Unit 6-7

You can perform the Loop DTE only if the DTE equipment has a feature to

send and detect a test pattern. The

DTE equipment sends the full

bandwidth signal through a

4000 foot (1220 meter) simulated line to the

DL600

E1 network receive circuitry. It should receive the same signal it

transmitted. The

E1 network transmitter continues to transmit toward

the network while the DL600E unit is in

DTE loopback.

E1 transmission is interrupted during the test.

Note: You do not need to inform the phone company before

running this test. However, you should inform them if the

test results indicate a phone company problem, or require

the DL600E unit to be removed from service.

Figure 6-2 Loop

DTE Test

Loop NET Test

The Loop NET test veriÞes the operation of the E1 network and is

available only with full bandwidth. It loops the data received from the

network back to the network. The data is regenerated before it is

looped back, however, the unit does not perform additional processing

of the data. This minimizes the impact on the DL600E unit during the

test so that network problems can be isolated.

Figure 6-3 Loop NET Test

Network

Interface

DATA

Port

DATA

Port

Network

Interface

Remote Solo E1 EncoreLocal Solo E1 Encore DTE

DTE

DATA

Port

Network

Interface

DATA

Port

Network

Interface

Remote Solo E1 EncoreLocal Solo E1 Encore

DSU DSU

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