User's Manual

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3. To reset the counters, click Reset Statistics at the bottom of the page.
The fields on this page are explained in the following table.
Field Name Description
Mode xDSL mode that the modem has trained under, such as ADSL2+, G.DMT, etc.
Traffic Type Connection type. Options are:
ATM
,
PTM
and
ETH
.
Status Status of the connection. Options are:
Up
,
Disabled
,
NoSignal
, and
Initializing
.
Link Power State Current link power management state (e.g., L0, L2, L3).
Downstream
and
Upstream
columns
Line Coding (Trellis) State of theTrellis Coded Modulation. Options are
On
and
Off
.
SNR Margin (0.1 db) The signal-to-noise ration margin (SNRM) is the maximum increase (in dB) of the
received noise power, such that the modem can still meet all of the target BERs
over all the frame bearers. [2]
Attenuation (0.1 db)
The signal attenuation is defined as the difference in dB between the power
received at the near-end and that transmitted from the far-end. [2]
Output Power (0.1
dBm)
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 con-
ditions:
l Single frame bearer and single latency operation
l Signal-to-Noise Ratio Margin (SNRM) to be equal or above the SNR Target Mar-
gin
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]
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
Errors
The number of Reed-Solomon-based FEC codewords received with errors that were
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 mul-