Would they still do it even though now I've switched line rental to AOL?

No noise....seems clear to me.

That's 1 of the many disadvantages of moving your line away from BT. Now it may be AOL's responsibility, but the work is still done by BT Openreach.

But is your line still a BTw line (i.e. Partial LLU)? Does your phone # still work in here: http://www.dslchecker.bt.com/adsl/adslchecker.welcome ?

In reply to a post by XRaySpeX:

That's 1 of the many disadvantages of moving your line away from BT. Now it may be AOL's responsibility, but the work is still done by BT Openreach.

But is your line still a BTw line (i.e. Partial LLU)? Does your phone # still work in here: http://www.dslchecker.bt.com/adsl/adslchecker.welcome ?

Or do you get the menu read out to you if you call 17070. If yes, select option number 2 and listen, critically.

From the statistics you have just posted, we can definitely say that your target SNRM is set at 9 dB.

I guess I really should've explored things more thoroughly than jumping into the lure of the apparent savings. My no doesn't work in that link and I get my phone no read out to me repeatedly when I dial 17070...no menu. So that means my landline is fully under AOL LLU?

In reply to a post by fsa297:

I guess I really should've explored things more thoroughly than jumping into the lure of the apparent savings. My no doesn't work in that link and I get my phone no read out to me repeatedly when I dial 17070...no menu. So that means my landline is fully under AOL LLU?

ACK. You have a fully LLU'd line. And as AOL is now owned by TalkTalk, I will assume that you are connected via the TalkTalk circuits.

Oh cr*p. I really should do more reading around before committing. Are the TalkTalk circuits known to be worse than BT?

How can I reduce my SNRM? I just read somewhere that increasing it improves line stability at the expense of bandwidth....but who decides what my SNRM is set at? If it's the ISP, how do they determine how unstable my line is? Unless it's automatically done by the router...

No. Depending upon circumstance, it can be an advantage.

(For the record, I am a TalkTalk user with a fully LLU'd line.)

The target SNRM value is set by the ISP (the CP). The line profile is adjusted by the DLM software, which constantly monitors the line.

To get an idea of how currently stable / unstable your line is behaving, it is recommended to install routerstats and allow it to monitor the line for a couple of days.

In my case, as an actual TalkTalk customer, I was able to request that the DLM was turned off, that the target SNRM was set to 6 dB and that fast path (no interleaving) was enabled for my line. Obviously I need to keep a check on my line's behaviour but, to date, it has remained stable with the best performance possible for the physical condition of the line.

The default Target NM is set by the ISP and the router and exchange negotiate it from that (using DLM = Dynamic Line Mgt). TalkTalk's default is 12dB and user's can request changes to it (also Interleaving/Fast Path) on their Control Panel at TT site. Don't know, & never heard, if AOL operates such a system.

Given a suitable router, such as Netgears DG834G v4 and DG834GT (mine), you can change Target NM via CLI or tools like DMT Tool. Have a read of: Tweaking Netgears through the CLI. & Using the DMT Tool and round & about

Many thanks to the both of you for your advice and input.

So even if the ISP has set a higher default target NM, it can be overridden by tweaking the router's target NM?

I'm running routerstats right now and will post the capture once it's got a couple of days' data.

Unfortunately my ST is running at v6.2+ which means I need to flash it to 6143 before being able to use DMT Tool to change the target NM. Any way of finding out if the router is locked to AOL which would prevent downgrading?

Edited by deleted (Tue 24-Jan-12 01:47:50)