In reply to a post by iwish:
10697 crc in that time
I can't remember what my CRC error rate was when I was on ADSL, but that sounds rather high... though I'm quite prepared to be contradicted!
It's possible to get rather higher and still have a usable link.
I have a long line - attenuation approx 62dB but relatively stable noise levels so I force the connect SNRM down from its 9dB default to around 3dB (probably drops to 2dB or just under at its worst point in the day). However that does produce some frightening figures.
Current uptime just over a month (2835457 secs) ES: 55687, SES: 1888; HEC errors: 151046
Generally 3-5% of packets need error correction, about 0.01%-0.05% are uncorrectable but TBH the wider Internet probably looses more than this.
I'm afraid my philosophy is rather that if you're getting few errors then FEC is a waste of bandwidth and I don't really have it to waste (sync ~3600Kbps even @ 3dB SNRM). I do realise that I' failrly lucky in having a line with a stable noise profile so that playing this sort of game is feasible.