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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