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The Loopback menu shown in
this menu, select VT/Port or STS-1. Once this selection is made, a second menu displays the types of tests
available.
The VT/Port menu allows selection of any port from 1 to 28. The STS-1 menu loops the STS-1 path. The
menu types, their descriptions, including diagrams of the activated loopbacks, are described in this section
as follows:
•
VT/Port Loopbacks
•
STS-1 Loopbacks
on page 6-8
1.
VT/PORT LOOPBACKS
After selecting the number that corresponds with the line to test, the menu in
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.
61204659L1-1A
S
ECTION
Section 6
Loopbacks
Figure 6-1
allows initiating loopback tests from the MX2800 STS-1. From
on page 6-1
Figure 6-1. Loopback Menu
6, L
OOPBACKS
Figure 6-2
appears. The
6-1
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