ZyXEL Communications MSC1024G Series User Manual page 800

Chapter 32 profile Commands
[maxsnrmds <max_margin_ds>]
[maxsnrmus <max_margin_us>]
[minsnrmds <min_margin_ds>]
[minsnrmus <min_margin_us>]
[msgminds <msgmin>]
[msgminus <msgmin>]
[maxnomatpds <tx_power>]
[maxnomatpus <tx_power>]
[maxaggrxpwrus <rx_power>]
[pmmode <disable|allowidle>]
[rfiband <start_tone> <end_tone>
[...]]
[bitswapds disable|enable]
[bitswapus disable|enable]
800
= The downstream (ds) and upstream (us) maximum
SNR (Signal to Noise Ratio) margin allowed on the
line. When the actual SNR margin is going to reach
this specified value, this mechanism forces
connected CPE device(s) to lower its transmission
power level and maintains the actual SNR margin
equal to or less than this value.
max_margin_ds: <target_margin_ds>~310 in
0.1dB or disable
max_margin_us: <target_margin_us>~310 in
0.1dB or disable
= The downstream (ds) and upstream (us) minimum
SNR margin accepted on the line to which this
profile applies.
<min_margin_ds>: 0~<target_margin_ds> in
0.1dB
<min_margin_us>: 0~<target_margin_us> in
0.1dB
= The downstream (ds) and upstream (us) minimum
transmission rate reserved for a line's overhead
channel. Both the system and CPE device use the
overhead channel of a line to get VDSL
transmission statistics with each other.
<msgmin>: minimum message-based overhead
rate, 4~248 in kbps
= The maximum transmission power (0~255 in 0.1
dBm) the system uses for downstream (ds) traffic.
Enter the maximum transmission power the CPE
uses for upstream (us) traffic.
= The maximum receiving power (-255~255 in 0.1
dBm or disable) for upstream (us) traffic.
= Use allowidle to have the system or CPE
devices autonomously enter an idle state for power
management (PM).
= 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>
= 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.
MSC1000G/1024G/1224G Series User's Guide