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

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