JDS Uniphase SC-ADSL-A, Руководство пользователя

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Chapter 7 Interpreting Test Results
Fast Errors
48 SmartClass ADSL/Copper Tester User’s Guide
Fast Errors
Table 7 describes the Fast Error results.
Interleaved Errors
Table 8 describes the Interleaved Error results.
ATM general results
ADSL typically transports data over ATM (Asynchronous Transfer Mode)
circuits. (Some systems transmit over packet mode circuits.) The ATM cate-
gory provides results that help you troubleshoot ADSL network connections.
These results are helpful if IP pings are not working, but your tester is still
sending and receiving ATM cells.
Table 9 describes the ATM general test results.
Table 7 Fast Errors
Result Description
TRAINED PATH Whether the modems trained with the FAST or INTLV (inter-
leaved) path.
FAST CRC Fast Cyclical redundancy check upstream and downstream
FAST FEC Fast Forward Error Correction upstream and downstream
FAST HEC Fast Header Error Correction upstream and downstream
Table 8 Interleaved Errors
Result Description
TRAINED PATH Whether the modems trained with the FAST or INTLV (inter-
leaved) path.
INTLV CRC Interleaved Cyclical redundancy check upstream and down-
stream
INTLV FEC Interleaved Forward Error Correction upstream and down-
stream
INTLV HEC Interleaved Header Error Correction upstream and down-
stream
Table 9 ATM general results
Result Definition
GOOD CELL CNT Total number of cells that contain data and reached the
other end error free.
IDLE CELL CNT Total number of idle cells.
BAD HEC CELL
CNT Total number of cells that were bad due to HEC errors.