ZyXEL Communications MSC1000G Series, User Manual

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Chapter 12 Statistics Screens
Management Switch Card User’s Guide
449
12.11.4.7 1day DSL Line Performance
To display line performance counters for the past one day, click the port number in the line card’s
statistics screen (see
Figure 288 on page 431 ) and click the 1day tab.
TimeElapsed shows how long the port’s downstream and upstream connections have been up
during the current day.
MonitoredTime shows how long the port’s downstream and upstream connections have been up
during a previous day.
FailFulInit These are the DSL line’s downstream and upstream numbers of initialization failure
traps that have occurred within the current 15 minute period.
ChanCorrectedBlks These are the numbers of corrected blocks for downstream and upstream
transmissions.
UnCorrectedBlks These are the numbers of uncorrected blocks for downstream and upstream
transmissions.
CodeViolations These are the numbers of incorrect cyclic redundancy checks that have occurred
within the current 15 minute period.
RtxCw These are the numbers of RS (Reed-Solomon) codewords or DTUs (Data Transfer
Units) retransmitted through PhyR or G.INP retransmissions within the current 15
minute period.
RtxCorrectedCw These are the numbers of RS codewords or DTUs that have been corrected through
PhyR or G.INP retransmissions within the current 15 minute period.
RtxUncorrectedCw These are the numbers of RS codewords or DTUs that were not corrected successfully
through PhyR or G.INP retransmissions within the current 15 minute period.
Leftrs (seconds) These are the numbers of seconds during which the Error Free Throughput went
below the pre-configured threshold within the current 15 minute period.
MinEftr (kbps) These are the lowest value of the Error Free Throughput within the current 15 minute
period.
ErrFreeBits These are the numbers of bits that passed through the alpha1/beta1 interface (bits
that are available to carry user payload) within the current 15 minute period.
EQINP[1]~EQINP[17] EQINP[i] is used to compute equivalent INP anomaly and it is actually equivalent to (i
DMT symbols. For example, EQINP[17] means 17 equivalent INP anomalies and it
also means there are more than 16 DMT symbols.
The EQINP histogram shows the level of INP required to prevent data errors.
IAT[0]~IAT[7]
IAT[i] is used to compute the inter-arrival time which falls in the range from
(IATO+(i-1)*2^(IATS)) to ((IATO-1)+i*2^(IATS)).
IATO indicates inter-arrival time offset while IATS indicates inter-arrival time step.
They are used to determine in which bin (category) of the IAT histogram the IAT is
reported. The IAT histogram shows time intervals between the impulse noise events.
Symbols These are the numbers of DMT symbols the impulse noise protection sensor has
inspected.
Previous 10 Click Previous 10 to show the preceding 10 pages of information.
Page X of X This identifies which page of information is displayed and the total number of pages of
information.
Previous/Next Click one of these buttons to show the preceding/following screen if the information
cannot be displayed in one screen.
Next 10 Click Next 10 to show the following 10 pages of alarms.
Table 213
Port Statistics: DSL Line Card: Line Performance: 15Min (continued)
LABEL DESCRIPTION