ZyXEL Communications SLC1224, Руководство пользователя

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SLC1224 User’s Guide
Chapter 7 Diagnostic 81
The following table describes the labels in this screen.
Table 37 DSL Line Diagnostic
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 G.SHDSL port. A local
loopback test is used to check the device's DSL chip. A local loopback test failure
indicates an internal device problem. The results (“Passed” or “Failed”) display in
the multi-line text box.
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 G.SHDSL 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.