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kilrathi
Premium
join:2005-04-22
Rockaway Park, NY
reply to riot808

Re: [TWC] need help troubleshooting connection

Thats true, however how long was the modem uptime and what was total of codewords against the uncorrectables, determine the %.


riot808

join:2012-07-06
Honolulu, HI

im at 11,000 correctables and modem time up is 6 hours...


harald

join:2010-10-22
Columbus, OH
kudos:2

The "SNR" reported by your modem is a calculated estimate based upon the ratio of good packets to correctable packets.

If the "SNR" is good, and 40 + is wonderful, then the number of uncorrectable packets is of no concern, as in zero, nada, zip, etc.



kilrathi
Premium
join:2005-04-22
Rockaway Park, NY

Assuming the uncorrectable packets dont occur at large numbers at intervals at the time u not monitoring downstream snr, there could be some noise that occurs at specific interrvals here and there but its doubtful


riot808

join:2012-07-06
Honolulu, HI
reply to harald

thank you for your sharing your knowledge :]


harald

join:2010-10-22
Columbus, OH
kudos:2
reply to kilrathi

said by kilrathi:

Assuming the uncorrectable packets dont occur at large numbers at intervals at the time u not monitoring downstream snr, there could be some noise that occurs at specific interrvals here and there but its doubtful

That's true. One of the problems in understanding this area of arcane modem behavior is that Broadcom and TI are very closemouthed about what time periods/number of packets they average over, etc. I have only found one very brief reference in a Cisco manual, and that referred to upstream measurements where the same technique is used.

riot808

join:2012-07-06
Honolulu, HI

anyone else have any other ideas?