Adtran 1200287L1 User Manual
Chapter 6. Diagnostics
6-2
MX2800 STS-1 User Manual
61200659L1-1
VT/PORT LOOPBACKS
After you select the number that corresponds with the line you want
to test, the menu in Figure 6-2 appears. The number selected
(1-28) refers to the VT number. The Port (T1/E1) that will be tested
is the port mapped to the selected VT number. The sections
following the figure provide descriptions and illustrations of the
testing options. Select
to test, the menu in Figure 6-2 appears. The number selected
(1-28) refers to the VT number. The Port (T1/E1) that will be tested
is the port mapped to the selected VT number. The sections
following the figure provide descriptions and illustrations of the
testing options. Select
1-D
ATA
M
ODE
to end a test in progress.
Figure 6-2. VT/Port Diagnostics Menu
Tributary
A
T
RIBUTARY
loopback loops the selected VT/Port back to the
network (STS-1). The T1/E1 is looped back through the STS-1
mapper. During this loopback, the corresponding DSX-1/E1 input
is overwritten by the outgoing DSX-1/E1 signal. See Figure 6-3 on
page 6-3 for an illustration of this test.
mapper. During this loopback, the corresponding DSX-1/E1 input
is overwritten by the outgoing DSX-1/E1 signal. See Figure 6-3 on
page 6-3 for an illustration of this test.