Zyxel IES-6000 [897/1156] Chapter 32 profile commands

Zyxel IES-5106 [897/1156] Chapter 32 profile commands
Chapter 32 profile Commands
Management Switch Card User’s Guide
897
[rfiband <start_tone> <end_tone> [...]] = Specifies the starting and ending tones for each RFI
band according to your location.
RFI (Radio Frequency Interference) is induced noise
on the lines by surrounding radio frequency
electromagnetic radiation from sources such as AM
and HAM radio stations. Since VDSL uses a much
larger frequency range that overlaps with other radio
frequency systems, signals from VDSL lines and
other radio systems interfere with each other. To
avoid performance degradation due to RFI, set the
system to not transmit VDSL signals in the RFI band.
<start_tone>: 1~4096 in units of 4.3125 kHz, 0
means not used
<end_tone>: 1~4096 in units of 4.3125 kHz, 0
means not used, equal to or larger than
<start_tone>
[bitswapds disable|enable]
[bitswapus disable|enable]
= Turn on downstream (ds) or upstream (us) bitswap
to allow on-line bits and power (for example, margin)
reallocation among the allowed sub-carriers without
service interruption or errors. This helps to keep
transmission data rates on a high SNR VDSL line.
[snrmodeds disable|enable]
[snrmodeus disable|enable]
= Enables or disables the downstream (ds) or upstream
(us) transmitter reference virtual noise.
[refvnds <tone_index> <vn_psd>
[...]]
[refvnus <tone_index> <vn_psd>
[...]]
= Adds virtual noise levels on downstream (ds) or
upstream (us) tones where actual noise may occur.
If there is too much noise on a line, the allowed line
speed may be reduced or the line may not initialized.
Virtual noise is the noise allowed before adjustment
occurs. Switch then uses lower data rate on tones
which you added a noise level for the line
initialization. Lower data rate increases a line’s
stability and avoid the line to be easily dropped when
actual noise occurs. The Switch adds pre-configured
virtual noise on specified set of breakpoints. used to
avoid a VDSL line assigning an overly optimistic
number of bits to a sub-carrier. When the actual
noise increased, the actual SNR margin is enough to
maintain the bit-loading, and not leads to line drop.
That is, the virtual noise adding can increase the
line’s stability.
<tone_Index>: 1~4096 in units of 4.3125 kHz, 0
means not used
<vn_psd>: 0~200 (representing a PSD of -140+psd/
2 dBm/Hz)
[dpbotype <dpbotype>]
= Sets the DPBO type.
dpbotype: 0=G.997.1 or 1=t-com

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