How is cross-channel data integrity verified in NANTeL?

• A. By relying on a single channel and ignoring others.
• B. By delaying data integrity checks until after a trip.
• C. By comparing channel data, performing checksums, and applying cross-check logic to ensure inputs are consistent before voting.
• D. By averaging random values.

Answer: (C)

Cross-channel data integrity is ensured by verifying consistency across all redundant channels before a decision is made. In NANTeL, each channel reports its reading, those readings are compared, checksums are computed to detect data corruption, and cross-check logic evaluates whether the inputs agree within expected limits. Only when the inputs are consistent does the voting logic produce a trip decision. This approach protects against a faulty or corrupted single channel and prevents incorrect actions by acting on consensus among reliable channels. Relying on a single channel omits necessary protection, delaying checks until after a trip misses early detection, and averaging random values doesn’t reveal faults or data corruption.