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OAM Loopback allows you to verify the connectivity between VP/VC endpoints, as well as segment
endpoints within the VP/VC. ATM uses two cell flows: F4 used in VPs and F5 used in VCs.
Figure 4-61
Flow type: The ATM OAM flow type. The selection can be F5 Segment, F5 End-to-End, F4
Segment or F4 End-to-End.
VPI: The VPI number you want to do the loopback diagnostics.
VCI: The VCI number you want to do the loopback diagnostics.
4.6.6.4. ADSL Diagnostic
Choose "Maintenance→Diagnostic→ADSL Diagnostic", you will see the next screen (shown in
Figure 4-62). ADSL diagnostics allows you to diagnostics the ADSL tone.
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