Local Loopback; Remote Loopback; Figure 4-13. Network Loopback Tests - ADTRAN TSU 610 User Manual

Chapter 4. T1 Network Interface

Figure 4-13. Network Loopback Tests

Local Loopback

There are two available choices for setting the local
loopback:
No Loopback
Deactivates the loopback.
Scroll to select a setting and record it by pressing . The
Enter
unit returns to the previous menu level.
Payload Loopback
Activates the payload loopback.

Remote Loopback

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:
No Loopback
Deactivates the loopback.
ATT Inband LLB
Activates the line loopback using inband code.
ANSI FDL PLB
Initiates the transmission of an FDL payload loopup code
toward the far end.
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