ADTRAN MX2800 Manual do Utilizador descarregar pdf (Página 106)

Chapter 6. Loopbacks

6-2 MX2800 M13 User Manual 61200290L1-1

T1/E1 LOOPBACKS

After you select the number that corresponds with the line you

want to test, the menu in Figure 6-2 appears. The sections following

the figure provide descriptions and illustrations of the testing

options. Select 1-D

ATA

ODE

to end a test in progress.

Figure 6-2. T1/E1 Loopback Menu

Tributary

A T

RIBUTARY

loopback loops the selected T1/E1 back to the

network (DS3). The T1/E1 is de-multiplexed through the M23 and

M12/G.747 de-multiplexers, looped back, and multiplexed back up

through the M12/G.747 and M23 multiplexers. During this

loopback, all network receive data is passed to the DSX-1/E1

transmitters, but all data received by the DSX-1/E1 loop side is

ignored and substituted with the network data. See Figure 6-3 on

page 6-3 for an illustration of this test.

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