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Field Name
Description
FEC Data Frame)
latency path. This is also the number of redundancy bytes per FEC Data Frame in the
current latency path.
S (ratio of FEC over
The ratio of FEC over PMD Data Frame length.
PMD Data Frame
length)
L (# of bits in PMD Data
The number of bits from the latency path included per PMD.
Frame)
D (interleaver depth)
The interleaving depth in the current latency path, used to manager error cor-
rection.
I (interleaver block
The block sizeused for interleaving data transmissions.
size in bytes)
N (RS codeword size)
The size of the Reed-Solomon (RS) codeword used for managing error correction.
Delay (msec)
The PMS-TC delay in milliseconds of the current latency path (or the lowest latency
path when running dual-latency paths).
INP (DMT symbol)
The input level for DMT-managed DSL environments.
(End of DSL-specific field group)
Super Frames
The number of xDSL Super Frames transmitted/received.
Super Frame Errors
The number of xDSL Super Frames transmitted/received with errors.
RS Words
The number of Reed-Solomon-based Forward Error Correction (FEC) codewords trans-
mitted/received.
RS Correctable Errors
The number of Reed-Solomon-based FEC codewords received with errors that have
been corrected.
RS Uncorrectable
The number of Reed-Solomon-based FEC codewords received with errors that were
Errors
not correctable.
HEC Errors
A count of ATM HEC errors detected. As per ITU-T G.992.1 and G.992.3, a1-byte HEC
is generated for each ATM cell header. Error detection is implemented as defined in
ITU-T I.432.1 with the exception that any HEC error shall be considered as a multiple
bit error, and therefore, HEC Error Correction is not performed. [1],[2]
OCD Errors
Total number of Out-of-Cell Delineation errors. ATM Cell delineation is the process
which allows identification of the cell boundaries. The HEC field is used to achieve
cell delineation. [4] An OCD Error is counted when the cell delineation process trans-
itions from the SYNC state to the HUNT state. [2]
LCD Errors
Total number of Loss of Cell Delineation errors. An LCD Error is counted when at
least one OCD error is present in each of four consecutive overhead channel periods
and SEF (Severely Errored Frame) defect is present. [2]
Total Cells
The total number of cells (OAM and Data cells) transmitted/received.
Data Cells
The total number of data cells transmitted/received.
Bit Errors
The total number of Idle Cell Bit Errors in the ATM Data Path. [3]
Total ES
Total number of Errored Seconds. This parameter is a count of 1-second intervals
with one or more CRC-8 anomalies. [4]
Total SES
Total number of Severely Errored Seconds. An SES is declared if, during a 1-second
interval, there are 18 or more CRC-8 anomalies in one or more of the received
bearer channels, or one or more LOS (Loss of Signal) defects, or one or more SEF
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