Not sure you quite understand my situation here


http://gyazo.com/c78c096db37198f59c85ece8571cd08c
Speeds: 6mb and 512kb


On my old modem, i got 35 attenuation and 10 snr margin


I dont understand how the attenuation has changed by a simple swap of modem as i understand it to be the lines length...

The change in Snr margin is kind of understandable as it can relate to modems, but, ive been experiencing better quality internet after the switch, so i dont know how you guys are saying higher snr margin is worse...

The higher noise margin reduces the connection speed, as explained.

At lower speeds there are fewer errors. That's why the DLM raises the margin, to lower the speed.

Given the lower connection speed and error rates, your connection runs better, though usually not as fast.

If you are running with very high error rates it's possible the number of errors could slow the actual throughput to less than you get with the lower connection speed and lower error rates. I used to get that. My router was so busy correcting the errors it didn't get much data through at all.

It's also quite common for different makes of router to report different attenuation so, just from calculating it differently. But only by 3-5 dB, not 10dB. One of yours may be reporting it incorrectly.

User may not be UK based and some overseas providers have different rulesets for what they provision to people

Looks like you have 2 threads running discussing the same thing...

Ignore the attenuation - it is pretty much irrelevant to your current issue.

As others have said, the higher the SNR the lower the speed. High SNRs can help if a line has regular disconnects but in general most connections work well at 6dB SNR which would give you a fair chunk of extra speed compared to your current 17dB. It could be pushed to 3 but as RobertoS says that could cause errors which would negate the extra sync speed.

In reply to a post by Xnbz:

Not sure you quite understand my situation here

You need to provide more data - makes of modems, modulation type, PPPoA or PPPoE, LLC or VCMux, who is the ISP, etc.

http://prntscr.com/7tquwz

PPPOE LLC


I have two modems, both of them have the above settings.

One modem is on 45 attenuation and 17 SNR Margin

The other is on 35 attenuation and 10 SNR Margin


Which one of these circumstances can allow me to upgrade? and to what speed?

Thanks for the help guys.

Edited by deleted (Fri 17-Jul-15 13:22:13)

Remove the Annex M. You need Annex A. I would expect a gain of about 2.5Mbps down and no effect at all up.

Edit: Because of your high downstream noise margin on either router, the gain may be less than 2.5Mbps. Once the noise margin is sorted then the 2.5Mbps should be something like.

Also if you have a list like ADSL2+, ADSL2, ADSL, G.DMT, tick the ADSL2 as well as the ADSL2+.

Edited by RobertoS (Fri 17-Jul-15 14:33:35)

http://prntscr.com/7tr27h


No Annex A...


What other recommendations do you have.

In reply to a post by MrSaffron:

User may not be UK based and some overseas providers have different rulesets for what they provision to people

Doesn't alter the physics. They are universal .

If you are in Germany then to be expected due to the large use of ISDN