Multitech MultiDSU MTT1DSU, Руководство пользователя

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Bursty Errored Secs
Bursty Errored Seconds (BES) are seconds containing 2 to 319 CRC6
errors.
Severely Errored Secs
Severely Errored Seconds (SES) are seconds with 320 or more CRC6
errors.
Failed Secs
Failed Seconds are seconds that failed due to one or more errors.
Controlled Slips
Controlled Slips (CS) occur when the receiving device either replicates
or deletes a DS1 frame.
Framing Bit Errors
Framing Bit Errors (FBE), also called Out Of Frame (OOF) errors, are
two frame bit errors in six consecutive frame bits.
Bipolar Violations
Bipolar Violations (BPV) occur when two adjacent bits are of same
polarity.