Upstream SNR jump ?

_John C

What could have caused my upload SNR to jump to 31.00 today, its usually 21.00 or 22.00?? Maybe exchange work/upgrade? According to the NGB map; my exchange is due to be upgraded between April - June.

Here are my stats for the last few days. Note the upload SNR for today (30-06-11).

Motorola Netopia 2247-62 Software Version 7.8.2r2

21-06-11 SYNC     ATTN DN   SNR DN   ATTN UP  SNR UP  MOD   DATA PATH

18:50   7168/384  23.00     12.20    11.50    20.00   DMT   INTERLEAVE

22-06-11 SYNC     ATTN DN   SNR DN   ATTN UP  SNR UP  MOD   DATA PATH

15:25   7168/384  23.00     12.30    11.50    21.00   DMT   INTERLEAVE
20:15   7168/384  22.50     11.90    12.00    19.00   DMT   INTERLEAVE

25-06-11 SYNC     ATTN DN   SNR DN   ATTN UP  SNR UP  MOD   DATA PATH

18:33   7168/384  23.00     12.20    11.50    22.00   DMT   INTERLEAVE
19:00   7168/384  23.00     12.00    12.00    21.00   DMT   INTERLEAVE
22:38   7168/384  22.50     12.00    12.00    21.00   DMT   INTERLEAVE

29-06-11 SYNC     ATTN DN   SNR DN   ATTN UP  SNR UP  MOD   DATA PATH

10:50   7168/384  23.00     12.00    12.00    22.00   DMT   INTERLEAVE

30-06-11 SYNC     ATTN DN   SNR DN   ATTN UP  SNR UP  MOD   DATA PATH

11:42   7168/384  23.00     12.00    11.50    31.00   DMT   INTERLEAVE
11:57   7168/384  23.00     11.90    12.00    31.00   DMT   INTERLEAVE 
12:41   7168/384  23.00     12.00    12.00    31.00   DMT   INTERLEAVE 
19:00   7168/384  23.00     11.50    12.00    31.00   DMT   INTERLEAVE 

Theres no problem but does anyone have any ideas why this happened?

all the best,
John

lucernarian

The same happened with the line of one of my relations in Louth. Upstream signal margin stuck at 31dB where it used to be at about 20 or 22dB I think.

On a netopia 2247.

I haven't had a chance to grab a modem that reports more details (like the upstream power level) so I don't have a clue as to what caused it.

_John C

Thanks for the reply

Ill connect my old 3347 later and see what it reports.

Also just to add, My router always displayed "Fastpath" instead of "Interleave" and then one day it changed to "Interleave" , So since that happened (about 3 or 4 months ago) Ive rang Eircom 3 times about lowering my latency so my router will read "Fastpath" instead of "Interleave". And each time they told my that they had adjusted my profile... But the change does not appear at my end. !!!

Pings to eircom.net used to be 14ms now they are 32ms since the change to "Interleave"

lucernarian

Eircom eh?

Could be worth posting a thread in their forum (http://www.boards.ie/vbulletin/forumdisplay.php?f=1293) to ask them to remove interleaving.

Tell them about the modem reporting "interleave" instead of fastpath and also how the ping times have increased.

_John C

Thanks
Ive posted about both issues in their forum.

_John C

Just tried 2 different modems:

Netopia 3347W SNR UP = 29dB
Netopia 2247-02 (with faulty wifi module) SNR UP = 29dB

So Ive got 3 modems giving me roughly the same result, so it aint my modem. Something must have been changed at the exchange.

(I know Im double posting here, Ive posted the same thing on the Eircom boards forum)