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Should my FEC increase by 100 per second?

dougrice
Rising Star
Posts: 217
Thanks: 1
Fixes: 2
Registered: 06-08-2007

Should my FEC increase by 100 per second?

My connection speed is poor, like alot of other people.

I have been measuring the errors are reported by my Solwise SA715 model. I log onto it and use the command AD SH ERROR

I noticed that I get the FEC increasing about 100 per second.

Is the fault likely to be in my wiring, my Solwise 715 ADSL model, or in the backhaul hitting contention problems?

Any ideas?

Doug

APPENDIX A sample of my measurements
====================================

--> ad sh perf
Downstream :
Noise Margin : 16.5 dB
Attenuation : 40.0 dB
Output Power : 21
Upstream :
Noise Margin : 11.0 dB
Attenuation : 23.0 dB
Output Power : 9

--> ad sh error
Downstream :
FEC : 14367 --- This is increasing rapidly at 100 per second
CRC : 4
HEC : 2
Upstream :
FEC : 3
CRC : 0
HEC : 0

--> ad sh defects
Downstream :
No defects
Upstream :
No defects
2 REPLIES
Community Veteran
Posts: 1,817
Thanks: 11
Registered: 30-07-2007

Should my FEC increase by 100 per second?

if in doubt google it that's what I always do. A quick google came up with this info. Hope it helps:

http://www.dslreports.com/forum/remark,11585082

A.
dougrice
Rising Star
Posts: 217
Thanks: 1
Fixes: 2
Registered: 06-08-2007

Should my FEC increase by 100 per second?

Thanks for the link.

A FEC is a forward correction, so the data is corrected without a retransmission. I suppose that the FEC can be monitored and the speed adapted up until CRC errors are likely.

However, a CRC error needs retransmission, which is a bigger issue. As long as the CRC error and retransmissions are kept low, the speed can be increased.