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Chapter 7. Test Menu
NI CSU
DS1
LOCAL LOOPBCK
There are three available choices for setting the local loopback:
Using the arrow keys, select a setting and record it by pressing
Enter
2)
REMOTE LOOPBK
This activates the same loopbacks as Local Loopback but at the
far end. It uses either the inband loop-up code as specified by
ANSI T1.403 for line loopback (ATT In-Band LLB), or the FDL
as specified in ANSI T1.403 for payload and line loopback
codes. The following options are available:
7-4
TSU 120
Payload Loopback
Line Loopback
Figure 7-2. Network Loopback Tests
LINE ON
PAYLOAD ON
NO LOOPBACK
. The unit returns the display of
REMOTE LOOPBCK
-
ATT IN
BAND LLB
ANSI FDL PLB
ANSI FDL LLB
TSU 120 User Manual
Secondary
Interface
Activates the line loopback
Activates the payload loopback
Deactivates the loopback
1)
Activates the line loopback using
inband code
Initiates the transmission of an FDL
payload loopup code toward the far
end
Initiates the transmission of an FDL
line loopup code toward the far end
and
LOCAL LOOPBCK
61202129L1-1
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