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Chapter 7. Test Menu
61202156L2-1 TDU 120e User Manual 7-5
After a R
EMOTE
L
OOPBACK
option is selected, the TDU
120e verifies that the far end is actually in a loopback by
checking for the receipt of a code looped back from the far
end.
Once the R
EMOTE
L
OOPBACK
type is selected, the terminal
displays the loopback progress by displaying L
OOPING
until loopback 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 DS0
S
. When QRSS is
set in all DS0s and one of the network loopbacks previ-
ously 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 DS0
S
, an integrity check
of the link can be run along with normal data flow. The
TST DS0
S
are user assigned as part of the DS0 Map.
This sets the pattern for the test and initiates the trans-
mission of the pattern. The test is terminated by selecting
N
ONE
.
The following patterns are available:
QRSS All DS0s
Generates a QRSS test pattern and inserts the pattern into
all DS0s.