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Ds2 Loopbacks; Ds2 Network; Figure 6-12.ds2 Loopback Menu; Figure 6-13.ds2 Network Loopback Test - ADTRAN MX2800 M13 User Manual

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MX2800 M13 Multiplexer User Manual
4.

DS2 LOOPBACKS

Once a number has been selected which corresponds with the DS2 to be tested, the DS2 menu in
Figure 6-12
on page 6-9 appears. The subsection following the figure provides a description and an
illustration of the DS2 Network loopback testing option. Select the appropriate DS2
test in progress.

DS2 Network

A DS2 Network loopback test loops the selected DS2 back to the network (DS3) prior to being passed
through the M12/G.747 de-multiplexer. All T1/E1s attached to that DS2 will receive data normally, but all
data inserted into the T1/E1s attached to the selected DS2 will be ignored and replaced by the incoming
DS2 network data. This test is illustrated in
DSX-3
DSX-3
LIU
LIU
61200290L1-1G
Figure 6-12. DS2 Loopback Menu
Figure
6-13.
F
F
M12/G.747
M12/G.747
R
R
D
D
A
A
S
S
MUX/DMUX
MUX/DMUX
F
F
M
M
2
2
R
R
E
E
(1 of 7)
(1 of 7)
M23
M23
D
D
A
A
R
R
S
S
M
M
MUX/DMUX
MUX/DMUX
3
3
E
E
R
R
Figure 6-13. DS2 Network Loopback Test
Loopbacks, Section 6
Data Mode
CODEC
CODEC
T1/E1 LIU
T1/E1 LIU
(1 of 28)
(1 of 28)
(1 of 28)
(1 of 28)
CODEC
CODEC
T1/E1 LIU
T1/E1 LIU
(28 of 28)
(28 of 28)
(28 of 28)
(28 of 28)
to end a
6-9

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