ZyXEL Communications P-660HN-51 User Manual page 223

OAM F4 or F5 tests are used to check virtual path or virtual channel availbility between two DSL devices.
Segment flows are terminated at the connecting point which terminates a VP or VC segment. End-to-
end flows are terminated at the end point of a VP or VC connection, where an ATM link is terminated.
Segment loopback tests allow you to verify integrity of a PVC to the nearest neighboring ATM device.
End-to-end loopback tests allow you to verify integrity of an end-to-end PVC.
Note: The DSLAM to which the Zyxel Device is connected must also support ATM F4 and/or F5
to use this test.
Note: This screen is available only when you configure an ATM layer-2 interface.
Figure 128 Maintenance > Diagnostic > OAM Ping Test
The following table describes the fields in this screen.
Table 99 Maintenance > Diagnostic > OAM Ping Test
LABEL DESCRIPTION
Select a PVC on which you want to perform the loopback test.
F4 segment Press this to perform an OAM F4 segment loopback test.
F4 end-end Press this to perform an OAM F4 end-to-end loopback test.
F5 segment Press this to perform an OAM F5 segment loopback test.
F5 end-end Press this to perform an OAM F5 end-to-end loopback test.
Chapter 29 Diagnostic
P-660HN-51 User's Guide
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