Telstra DJA0230 Manual page 35

Statistics for VDSL or ADSL connection
Log into gateway and go to Advanced > Broadband > DSL Diagnostics
example of a normal DSL link
1. Link Retrain count : Number of times link has had to disconnect to re-synchronise.
2. Sync Bandwidth (Down/Up) : Speed of link Mega bits per second (Mbps)
3. Loss of Sync, LOS (Local / Remote) Number of times Node or modem has lost sync
4. Loss of Framing, LOF (Local / Remote) : Number of times there has been a loss of frame error.
5. Loss of Margin, LOM (Local / Remote) : Number of times Signal to noise margin is to small for
signal to be accurately detected due to high noise or high attenuation.
6. Forward Error Correction, FEC : Number of errors that were detected and corrected.
7. Cyclic Redundancy Correction, CRC : A CRC error indicates that part of the data packet is corrupt
and requires retransmission.
8. Errored Seconds, ES : The number of seconds during which an CRC error was detected
9. Severely Errored Seconds SES : The number of seconds during 30% or more of the data blocks
had CRC errors
10. Unavailable Seconds UAS : The number of seconds the link was unable to transmit. Usually
indicate loss of the link.
Below is an example of a DSL link suffering frequent dropouts.
Above
is an