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Chapter 7. Test Menu
7-4
TSU 120 User Manual 61202129L1-1
Figure 7-2. Network Loopback Tests
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. The unit returns the display of
1)
LOCAL
LOOPBCK
and
2)
REMOTE
LOOPBCK
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:
LINE
ON
Activates the line loopback
PAYLOAD
ON
Activates the payload loopback
NO
LOOPBACK
Deactivates the loopback
ATT
IN
-
BAND
LLB
Activates the line loopback using
inband code
ANSI
FDL
PLB
Initiates the transmission of an FDL
payload loopup code toward the far
end
ANSI
FDL
LLB
Initiates the transmission of an FDL
line loopup code toward the far end
TSU 120
DS1
NI CSU
Payload Loopback
Line Loopback
Secondary
Interface