3.5 Loopback Testing

The IDL-2402 supports ATM and ADSL loop diagnostics.

ATM:

The system provides F5 end-to-end or segment loopback.

ADSL:

The system provides Dual Ended Loop Testing (DELT) for each ADSL line on a per port basis, according to the definition per section 8.12.3 of ITUT G992.3.

The following test parameters are supported:

-Channel Characteristics Function H(f) per subcarrier (CCF-ps),

-Quiet Line Noise PSD QLN(f) per subcarrier (QLN-ps),

-Signal-to-Noise Ratio SNR(f) per subcarrier (SNR-ps),

-Line Attenuation (LATN),

-Signal Attenuation (SATN),

-Signal-to-Noise Ratio Margin (SNRM),

-Attainable Net Data Rate (ATTNDR),

-Far-end Actual Aggregate Transmit Power (ACTATP),

-Near-End Actual Aggregate Transmit Power (ACTATP).

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