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Chapter 7. Test Menu
7-4 TSU 600 User Manual 61202076L1-1
Remote Loopbk
This activates the same loopbacks as Local Loopback but at the far end.
It uses either the inband loopup 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:
Remote Loopback can only be used with Fractional T1 if the ANSI FT1 LLB is
selected.
After a
Remote Loopback
option is selected, the TSU 600 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
Remote Loopback type is select-
ed, the LCD displays the loopback progress by displaying
Looping until
loopback is verified.
Name Description
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
ANSI FT1 LLB Initiates the transmission of a FT1 loopback
using the inband code described in T1.403.
No Loopback Deactivates the loopback