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How does ONT generate 10GE PCS HI BER alarm?

Question asked by viavisupport on Nov 29, 2018
Latest reply on Nov 29, 2018 by viavianswers

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How does ONT generate the 10GE PCS HI BER alarm?

viavianswers Nov 29, 2018 4:27 AM

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The IEEE 802.3 BER state diagram defines a PCS HI BER threshold of 16 invalid 66B sync headers within a 125µs window for 10GE. This equates to an invalid sync header rate of approximately 8.19E-4.

ONT generates the PCS HI BER alarm by inserting approximately 32 invalid sync headers within the 125µs window. This equates to an invalid sync header rate of approximately 1.6E-3 and exceeds the threshold defined by the standard.

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viavianswers Nov 29, 2018 4:27 AM
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Correct Answer
The IEEE 802.3 BER state diagram defines a PCS HI BER threshold of 16 invalid 66B sync headers within a 125µs window for 10GE. This equates to an invalid sync header rate of approximately 8.19E-4.

ONT generates the PCS HI BER alarm by inserting approximately 32 invalid sync headers within the 125µs window. This equates to an invalid sync header rate of approximately 1.6E-3 and exceeds the threshold defined by the standard.
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