ZyXEL Communications MSC1000G Series, Руководство пользователя

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Chapter 29 port Commands
Management Switch Card User’s Guide
780
29.4.11 port adsl optionmask Command
Syntax:
port adsl optionmask < slot-port > < option_mask >
where
This command masks (turns off) attributes for the specified port(s). It is for advanced
troubleshooting. Use an entry with a “1” instead of “0” before the “x” in order to turn the attribute
back on (remove the option mask).
The following example sets ADSL port 5 on the line card in slot 7 to not use Trellis encoding.
29.4.12 port adsl pmm disable Command
Syntax:
port adsl pmm disable < slot-port >
This command turns off the Power ManageMent (PMM) feature on the specified ADSL2/2+ port(s).
The following example sets ADSL2+ port 5 on the line card in slot 7 to not use power management.
<
option_mask
>
=
0x0001
: Disables Trellis
Trellis encoding helps to reduce the noise in ADSL transmissions. Trellis may
reduce throughput but it makes the connection more stable.
0x0002
: Disables Reed-Solomon
Reed-Solomon performs transmission error correction.
0x0004
: Disables upstream bitswap
0x0008
: Disables downstream bit swap
Bit swapping allows the system to respond to noise on a tone by sending it’s
data on another tone. The subscriber (ATU-R) equipment must also support
this in order for it to work.
0x0010
: Disables 1-bit constellation
1-bit constellation allows the system to send individual bits over DMT tones
that can only support one bit. This allows the connection to use as many of
the tones as possible.
0x0020
: Disables transmit windowing (ADSL2+ only)
0x0040
: Disables s=0.5 support option in G.dmt.
0.5 support maps two Reed-Solomon codewords into one data frame (instead
of one) to increase the maximum G.dmt transmission rate.
0x0080
: Disables G.lite rate limit (G.lite only).
Disabling the G.lite rate limit allows the G.lite upstream transmission rate to
be greater than 512 Kbps.
ras> port adsl optionmask 7-5 0x0001
ras> port adsl pmm disable 7-5