ZyXEL Communications MSC1000G Series, Руководство пользователя

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Chapter 12 Statistics Screens
Management Switch Card User’s Guide
440
Interleaving Depth This field displays the actual downstream/upstream interleaving depth. The value ranges
from 1 to 4096 with an increment of 1. The value 1 indicates no interleaving. The value 0
indicates a fast path.
Interleaving Block
L This field displays the actual interleaving block length. The value ranges from 4 to 255
with an increment of 1.
Actual Agg Tx
Power This is the total amount of downstream/upstream output power for this line. At the time
of writing, this field is a redundant item and always displays 0.
Latency Path This field displays the ID of the actual latency path this channel uses for upstream and
downstream transmission.
Ptm Status Packet Transfer Mode is a packet-based (for example, for Ethernet packets, IP packets,
etc.) transmission method applied in VDSL2. It can highly increase the efficiency of
packet transmission.
This field displays the current state of the VDSL channel in packet transfer mode.
noDefect : means both Switch and CPE device did not detect any failure or the channel is
not using packet transfer mode.
outOfSync : means an out of synchronization failure was detected.
RA Mode This field displays the actual rate adaptive mode.
n/a : no CPE device is connected to this port.
init : the system keeps the transmission rate negotiated between the system and CPE
devices at line initialization. The system automatically resumes a dropped link and
adjusts the data rate back to the allowed range.
manual : the system fixes the transmission rate as the minimum net data rate and
disables transmission rate adjustment. If the attainable speeds cannot match the
configured speeds, the VDSL link may go down or link communications may be sporadic
due to line errors and consequent retransmissions. The system does not automatically
resume a dropped link if you use this mode.
dynamic: Dynamic rate adaptation. The system dynamically changes the transmission
rate negotiated between the system and CPE devices during initialization as well as
during SHOWTIME status. This mode increases the line’s stability and avoid the line being
easily dropped when noise occurs. However, it may cause crosstalk noise during
transmission rate adjustment.
sos : SOS enabled. SOS is a system for realizing emergency rate reduction. The system
uses the emergency rate adjustment system for immediate rate adjustment to avoid
crosstalk noise.
Retransmission
Mode This field displays the G.INP retransmission mode.
inUse : G.INP retransmission is enabled on the system.
forbidden : G.INP retransmission is disabled on the system.
notSupportedXtuC : The connected CPE device does not support G.INP retransmission.
notSupportedXtuR : The system does not support G.INP retransmission.
notSupportedBoth : Both the system and the connected CPE device do not support
G.INP retransmission.
Retransmission
Overhead(kbps) This field displays the overhead for G.INP retransmission.
Table 210
Port Statistics: DSL Line Card: Line Detail (VLC14XX) (continued)
LABEL DESCRIPTION