Modem Profiles Management Model Quality Management
Relevant if the Rate Adaptation Mode was set to Dynamic with SRA.
Upshift Noise Margin - Noise Margin threshold for Upshift (rate increase).
Downshift Noise Margin - Noise Margin threshold for Downshift (rate
decrease).
Upshift Time Interval- Defines the interval of time the Noise Margin should
stay above the Upshift Noise Margin before the modem will attempt to
increase data rate.
Downshift Time Interval -This parameter defines the interval of time the Noise
Margin should stay below the Downshift Noise Margin before the modem will
attempt to decrease data rate.
Impulse Noise Protection
Impulse noise is a burst of energy spikes with random amplitudes, spectral and inter-arrival
time. Impulse Noise can be introduced in the loop either by man-made or natural
electromagnetic events, e.g. communication equipment, electrical appliances, lightning
discharges etc. Due to its non-stationary nature, impulse noise does not lend itself easily to a
statistical description. Impulse noise can be caused by various electronic devices, both inside
and outside the network and it can cause network errors. Actelis provides several INP
(Impulse Noise Protection) modes to reduce the number of errors that are caused by impulse
noise: interleaving, retransmission, fast or fast with delay.
The selected INP Mode can be common to both upstream and downstream or can be
individually set for each direction.
To create an Impulse Noise Protection Profile
1. In the Network Element tree, under Modem Profiles and under Quality Management,
select Impulse Noise Protection. The defined profiles are listed in the pane according to
their user assigned description and characteristics.
NOTE: Use the Add/View/Delete Profile buttons to define and manage the profiles.
2. In the displayed pane, click Add Profile. The Impulse Noise Protection profile definition
dialog appears:
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