LLU *technical* question

Trying to help an LLU victim - can someone tell us what ADSL mode (G.dmt, ADSL2+ etc) their LLU connection uses and what SNR margin/downstream speed/attenuation figures they get. Thanks.

Operation mode: G.DMT
Encapsulation: PPPoA VC Mux

My SNR is 6.0dB, Attenuation is 41dB and speeds are 5184/512Kbps (down/upstream respectively).

thanks, so it can work

the other guy gets ADSL2+

The default LLU minimum SNR for both up and downstream is currently 12dB. I suspect Chris may not be on LLU.


The PUG Tiscali FAQ explains what you need as well as a lot more info, available here.

Definitely on LLU, Peter (and suffering because of it!), but I suspect my router doesn't accurately report the SNR. It used to say 3dB when I was on IPStream for example, which seems a little unlikely!

Your router is way off then as LLU won't allow an SNR below 12dB, I know as I have been in discussions with PN about it being so high and hope to do some testing with with a lower SNR 'soon'.

his upstream looked LLU-like. Heard of anyone else with an ADSL2+ capable router having problems with it using the "wrong" standard ?

how come my SNR is 16.5 (up and down) and I'm on the dreaded LUU?

Not all routers report correct line stats. While my SNR appears to be shown correctly, the line attenuation I know is still 4dB out on a DG834v2 f/w 3.01.25.

What router are you using? Have you looked to see if a firmware update exists?

Chris could have been on a business product (Max pro) which has an upstream speed of up to 832Kbs. The SNR of 6dB is the normal default for Max, hence my initial thought that that was what he was on.

Anyway, I'm not aware of tiscali having any exchanges currently set for ADSL2+ so using that setting on the router should, in the absence of a true ADSL2+ protocol on the exchange, switch back to ADSL1 functionality, but what that would default to on the router I dont know.

The actual protocol selected may not matter much anyway, it the MUX setting that is the important one for LLU - i.e. VC MUX.