ZyXEL Communications ALC1224, User Manual

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ALC1224 User’s Guide
8-4 Diagnostics
Use this screen to check the card’s DSL chip via Local Loopback or connections via OAM F5 tests.
Figure 8-2 ALC Diagnostic DSL
Table 8-4 ALC Diagnostic DSL
LABEL DESCRIPTION
Up Click this link to go to the card’s Diagnostic screen.
Port Select a DSL port number from the drop-down list box.
Local Loopback Click this to perform a local loopback test on the specified DSL port. A local loopback test is
used to check the device's DSL chip. The results (“Passed” or “Failed”) display in the multi-line
text box. A local loopback test failure indicates an internal device problem.
OAM F5
Loopback Select a VPI/VCI from the drop-down list box and click OAM F5 Loopback to perform an
OAMF5 loopback test on the specified DSL port. An Operational, Administration and
Maintenance Function 5 test is used to test the connection between two DSL devices. First, the
DSL devices establish a virtual circuit. Then the local device sends an ATM F5 cell to be
returned by the remote DSL device (both DSL devices must support ATM F5 in order to use this
test). The results (“Passed” or “Failed”) display in the multi-line text box.