SONIQ CWR150NS - Manual (Page 88)

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3.8.2 ATM Loopback
Choose Diagnostic > ATM Loopback. The page shown in the following figure
appears. In this page, you can use VCC loopback function to check the
connectivity of the VCC. The ATM loopback test is useful for troubleshooting
problems with the DSLAM and ATM network.
Click Run Loopback to start testing.
3.8.3 ADSL
Choose Diagnostic > ADSL. The page shown in the following figure appears. It is
used for ADSL tone diagnostics.