ZyXEL Communications MSC1000G User Manual page 356

Chapter 11 Profile Screens
Figure 228 Profile > VDSL2 > Inm Profile
The following table describes the labels in this screen.
Table 167 Profile > VDSL2 > InmProfile
LABEL
Name
DownStream
Upstream
Equivalent INP
Mode
Cluster
Continuation
Parameter [0~64]
Inter Arrival Time
Offset [3~511]
Inter Arrival Time
Step [0~7]
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DESCRIPTION
Enter a descriptive name for identification purposes.
The parameters in this column relate to downstream transmissions.
The parameters in this column relate to upstream transmissions.
Select how to compute the "equivalent INP" (Impulse Noise Protection). ITU-T G.993.2
Amendment 2 and G.997.1 call this parameter INM_INPEQ_MODE.
0: the equivalent INP equals the Impulse Noise Cluster Length (INCL) with the cluster
continuation parameter set to 0. INCL is defined as the number of data symbols from the
first to the last severely degraded data symbol in the cluster. The cluster cannot contain
any gaps so this is the number of severely degraded data symbols in the cluster. Your
cluster continuation parameter configuration is ignored when you select mode 0.
1: the equivalent INP equals the INCL with the cluster continuation parameter set as
configured. The cluster can contain gaps up to the size of the cluster continuation
parameter.
2: the equivalent INP equals the number of severely degraded data symbols in the cluster
with the cluster continuation parameter set as configured. The cluster can contain gaps up
to the size of the cluster continuation parameter.
3: the equivalent INP is set using a set of equations related to interoperation with Reed-
Solomon coding as defined in the standard, specifically in Draft Amendment 2 to ITU-T
G.993.2, Section 11.4.2.2.
Specify a number of DMT symbols to set how big a gap of non-severely degraded data
symbols must be to separate a cluster.
Specify the inter-arrival time (IAT) offset to determine in which bin of the IAT histogram
the IAT is reported. The offset is measured in DMT symbols. ITU-T G.997.1 calls this
parameter Impulse Noise Monitoring Inter Arrival Time Offset (INMIATO).
Specify the inter-arrival time step for the IAT anomaly generation that determines in
which bin of the inter-arrival time histogram the IAT is reported. ITU-T G.997.1 calls this
parameter Impulse Noise Monitoring Inter Arrival Time Step (INMIATS).
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