Troubleshooting
150-357-200-02, Issue 2
52
February 9, 1999
HXU-357 List 1
T
ROUBLESHOOTING
shows system loopbacks and test access points.
provides a
legend for the various test points. By installing a HiGain Test Card, you can
easily access the various test points.
Figure 9.
System Loopbacks and Test Access
Table 12.
System Loopback Definitions
Test Point
Loopback Definition
TLB3
(a)
(b)
Terminal loopback to the customer at the DS3 line. Activated through the
multiplexer unit (
option from the Shelf Status screen followed by the
option
sequence , , ).
See
FLB3
(
)
Facility loopback to the network at the DS3 line. Activated through the
multiplexer unit (
option from the Shelf Status screen followed by the
option
sequence , , ).
See
M
1
4
2
M
1
4
1