ZyXEL VES1724-56B2 User Guide - Page 119

VDSL INM Profile Setup

Page 119 highlights

Chapter 9 VDSL Setup Table 41 VDSL Channel Profile Setup > G.INP (continued) LABEL REIN Config Modify Cancel Clear DESCRIPTION Specify the major REIN (Repetitive Electrical Impulse Noise) with how many consecutive DMT symbols long and the operating frequency (100 or 120 Hz) in your territory. The Switch can completely correct the impulse noise by using the retransmission function. Click Modify to save the new settings to the Switch. Click Cancel to reset the fields to your previous configuration. Click Clear to clear the fields to the factory defaults. 9.3.9 VDSL INM Profile Setup Click the InmProfile link at the top-right corner of the VDSL Template Setup screen to open the screen shown below. In Impulse Noise Monitoring (INM), a cluster contains one or more groups of one single or consecutive severely degraded data symbols caused by impulse noise. Each cluster starts and ends with a severely degraded data symbol. Groups in a cluster are separated by a gap. A gap is a group of non-severely degraded data symbols between two severely degraded data symbols. Gaps between the groups in a cluster are smaller then or equal to the specified INM Cluster Continuation (INMCC). Gaps between the clusters are greater than the specified INMCC. Figure 63 INM Cluster Example Gap ( Ù INMCC) Gap (> INMCC) Gap (> INMCC) Gap (> INMCC) Cluster Gap Severely Degraded Data Symbol(s) Group Use this screen to view, add, modify and delete VDSL INM profiles. An INM profile defines the control parameters used to generate the Equivalent INP (Eq INP or INP_Eq) and Inter-Arrival Time (IAT) histograms. The IAT represents the number of data symbols from the start of one cluster to VES1724-56 User's Guide 119

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Chapter 9 VDSL Setup
VES1724-56 User’s Guide
119
9.3.9
VDSL INM Profile Setup
Click the
InmProfile
link at the top-right corner of the
VDSL Template Setup
screen to open the
screen shown below.
In Impulse Noise Monitoring (INM), a cluster contains one or more groups of one single or
consecutive severely degraded data symbols caused by impulse noise. Each cluster starts and ends
with a severely degraded data symbol. Groups in a cluster are separated by a gap. A gap is a group
of non-severely degraded data symbols between two severely degraded data symbols. Gaps
between the groups in a cluster are smaller then or equal to the specified INM Cluster Continuation
(INMCC). Gaps between the clusters are greater than the specified INMCC.
Figure 63
INM Cluster Example
Use this screen to view, add, modify and delete VDSL INM profiles. An INM profile defines the
control parameters used to generate the Equivalent INP (Eq INP or INP_Eq) and Inter-Arrival Time
(IAT) histograms. The IAT represents the number of data symbols from the start of one cluster to
REIN Config
Specify the major REIN (Repetitive Electrical Impulse Noise) with how many consecutive
DMT symbols long and the operating frequency (100 or 120 Hz) in your territory. The
Switch can completely correct the impulse noise by using the retransmission function.
Modify
Click
Modify
to save the new settings to the Switch.
Cancel
Click
Cancel
to reset the fields to your previous configuration.
Clear
Click
Clear
to clear the fields to the factory defaults.
Table 41
VDSL Channel Profile Setup > G.INP (continued)
LABEL
DESCRIPTION
Gap
(> INMCC)
Gap
(> INMCC)
Gap
(> INMCC)
Cluster
Gap
Severely Degraded Data Symbol(s) Group
Gap (
INMCC)