SmartRG Inc., an ADTRAN company. All Rights Reserved. © 2020
18
Field Name
Description
l
Accounting for all coding gains available (e.g., trellis coding, RS FEC) with
latency bound
l
Accounting for the loop characteristics at the instant of measurement [2]
Output Power (0.1 Bm)
Transmit power from the gateway to the DSL loop relative to one Milliwatt (dBm).
Attainable Rate (Kbps)
The typically obtainable sync rate, i.e., the attainable net data rate that the receive
PMS-TC and PMD functions are designed to support under the following conditions:
l
Single frame bearer and single latency operation
l
Signal-to-Noise Ratio Margin (SNRM) to be equal or above the SNR Target Margin
l
BER not to exceed the highest BER configured for one (or more) latency paths
l
Latency not to exceed the highest latency configured for one (or more) latency
paths
l
Accounting for all coding gains available (e.g., trellis coding, RS FEC) with
latency bound
l
Accounting for the loop characteristics at the instant of measurement [2]
Rate (Kbps)
The current net data rate of the xDSL link. Net data rate is defined as the sum of all
frame bearer data rates over all latency paths. [2]
Downstream
and
Upstream
columns for DSL-specific fields only
B (# of bytes in Mux Data
Frame)
The nominal number of bytes from frame bearer #n per Mux Data Frame at Reference
Point A in the current latency path.
M (# of Mux Data Frames
in FEC Data Frame
The number of Mux Data Frames per FEC Data Frame in the current latency path.
T (Mux Data Frames over
sync bytes)
The ratio of the number of Mux Data Frames to the number of sync bytes in the current
latency path.
R (# of check bytes in FEC
Data Frame)
The number of Reed Solomon redundancy bytes per codeword in the current latency
path. This is also the number of redundancy bytes per FEC Data Frame in the current
latency path.
S (ratio of FEC over PMD
Data Frame length)
The ratio of FEC over PMD Data Frame length.
L (# of bits in PMD Data
Frame)
The number of bits from the latency path included per PMD.
D (interleaver depth)
The interleaving depth in the current latency path, used to manager error correction.
I (interleaver block size in
bytes)
The block sizeused for interleaving data transmissions.
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 OH Frames transmitted/received.
