ADTRAN MX2800 - DS2 Network; Figure 6-12. DS2 Diagnostics Menu; Figure 6-13. DS2 Network Loopback Test

Chapter 6. Diagnostics
6-10 MX2800 User Manual 61200290L1-1
Figure 6-12. DS2 Diagnostics Menu
DS2 Network
A
DS2 N
ETWORK
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 Figure 6-13.
Figure 6-13. DS2 Network Loopback Test
DSX-3
LIU
M23
MUX/DMUX
M12/G.747
MUX/DMUX
(1 of 7)
F
R
A
M
E
R
D
S
2
F
R
A
M
E
R
D
S
3
.... ....
T1/E1 LIU
(1 of 28)
CODEC
(28 of 28)
CODEC
(1 of 28)
T1/E1 LIU
(28 of 28)
DSX-3
LIU
M23
MUX/DMUX
M12/G.747
MUX/DMUX
(1 of 7)
F
R
A
M
E
R
D
S
2
F
R
A
M
E
R
D
S
3
....
T1/E1 LIU
(1 of 28)
CODEC
(28 of 28)
CODEC
(1 of 28)
T1/E1 LIU
(28 of 28)