ADC MM701G2, Руководство пользователя

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Chapter 9: Managing the Modem April 14, 2006
9-10 MM70xG2-UM-03
View G.shdsl Error Counters
Use the statistics on the G.SHDSL Error Counters page for troubleshooting and monitoring G.shdsl transmission.
Step Action
1 Select DSL on the menu bar, then select Error Counters under DSL Options to access the G.SHDSL
Error Counters page (
Figure 9-8 ).
Figure 9-8. G.SHDSL Error Counters
2 View the current statistics as described below:
• CRC Errors
Indicates the total number of cyclic redundancy check (CRC) errors that have occurred on the G.shdsl
connection since the last time that the G.shdsl error counters were cleared. CRC is an error checking
technique used to ensure the integrity of data during transmission.
• LOSW Errors
Indicates the total number of loss of sync word (LOSW) defects that have occurred since the last time
that the G.shdsl error counters were cleared. An LOSW is indicated when three or more consecutive
frames contain one or more bit errors in the frame sync word.
• Errored Seconds
Indicates the total number of seconds in which one or more CRC errors occurred since the last time
that the G.shdsl error counters were cleared.
• Severely Errored Seconds
Indicates the total number of seconds in which 50 or more CRC errors occurred since the last time that
the G.shdsl error counters were cleared.
• Unavailable Seconds
Indicates the total number of seconds that the G.shdsl connection has been non-operational due to
loss of synchronization or excessive errors since the last time that the G.shdsl error counters
were cleared.