ADTRAN 1200287L1 Manual de usuario descargar pdf (Pagina 103)

Chapter 6. Loopbacks

61185001L1-1 MX2810 M13 User Manual 6-7

DS3 LOOPBACKS

After you select DS3 L

OOPBACK

, the menu in Figure 6-8 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 6-8. DS3 Loopback Menu

Line Loopback

INE

OOPBACK

performs a loop of the DS3 back to the network.

This loopback occurs just prior to the DS3 framer and B3ZS

decoder, but it makes full use of the DS3 LIU in both receive and

transmit directions; therefore, any coding violations received by the

DS3 will be inserted back into the network without modification.

See Figure 6-9 on page 6-8 for an illustration of this test.

If a L

INE

LOOPBACK

is active when the MX2810 is operating in the

OCAL

timing mode, the timing source for the DS3 is effectively removed

from the circuit. Therefore, it is up to the test equipment or network to

provide DS3 timing into the circuit for the duration of the test.

1 2 ... 98 99 100 101 102 103 104 105 106 107 108 ... 203 204

Sin comentarios

ADTRAN 1200287L1 Manual de usuario Pagina 103