ADTRAN 1202052L1, User Manual, Page: 89 / 136

Chapter 7. Test Menu
61202052L1-1 TSU 100 User Manual
7-5
After a
Remote loop-back
option is selected, the TSU 100 ver-
ifies that the far end is actually in a loop-back by checking for
the receipt of a code looped back from the far end. Once the
Remote Loopback type is selected, the LCD displays the loop-
back progress by displaying
Looping
until loop-back is verified.
Test Patterns
All Ones
Sends an all ones pattern to the network.
All Zeros
Sends an all zeros pattern to the network.
QRSS Pattern
The QRSS pattern is commonly used to simulate real data in T1
interfaces. This pattern can be assigned to appear in all DS0s or
only in TST DS0s. When QRSS is set in all DS0s and one of the
network loop-backs previously described is activated at the far
end, a total end-to-end integrity check can be run without the
need for any external test equipment. When QRSS is assigned
to TST DS0s, an integrity check of the link can be run along
with normal data flow. The TST DS0s are user assigned as part
of the DS0 Map.
This sets the pattern for the test and initiates the transmission
of the pattern. The test is terminated by selecting None. The
following patterns are available:
QRSS always runs at 64K/DS0.
QRSS All DS0s Generates a QRSS test pattern and
inserts the pattern into all DS0s
QRSS TST DS0s Inserts a QRSS pattern in those DS0s
mapped as TST in the currently active
map (A or B)
None Terminates pattern generation