6db is the target for MAX products - trying to get the most out of your line. Higher than 6db means you have a higher margin - maybe you are close enough to easily get 8Mbps, maybe your line has a higher target due to instability issues, maybe you are not on MAX.

I'm definitely on max and I have 6db. I think that was my point - that 6db is the target. The poster that I responded to was suggesting that is was not??

The 6db is the default target, but quite commonly the target noise margin may be higher, e.g. 9db, 12db, 15db for noisier lines.

Disagree all you want. ADSL is my job.

6dB is the standard margin target on a MAX line. MAX will aim at the best speed for a margin of 6dB. If it gets 8meg, then there will most likely be some spare margin & the router/modem will show this.

If the line has problems, noise, dropouts, etc, then BT will set the margin target higher, 9dB, 12dB, or 15dB & hence the downstream speed will be slower than a 6dB margin.

Thanks all of you. I guess i have learnt something the hard way :-)

I will bend to more knowlegable people. Thanks for putting me right, I'd better not believe everything I read on the internet or maybe I interpreted it incorrectly. At my age that is very easy to do!

Hope my post has not mislead anyone.

Brian

In reply to:

---

It only goes over 6dB, if the line is in sync at 8meg & has margin to spare or BT has forced a higher margin due to problems.

---

What happens if your router has an uptime of over 14 days on the standard 6 dB default setting?

My uptime is just over 11 days.

I hope that my SNR isn't reduced to 3 dB as, with my attenuation (53 dB), my router couldn't cope!

I reckon it will stay at around 6db, as that is the default and generally lowest target noise margin. I wouldn't worry

In reply to:

---

I reckon it will stay at around 6db, as that is the default and generally lowest target noise margin. I wouldn't worry

---

Thanks for that mate as I was a little concerned as last time when I asked to have my SNR raised to 9 dB (I wasn't using the SpeedTouch 585 back then which seems to manage my long line a lot better than my old Billion router ever did), after around 18 days I woke one morning to find that my SNR was back on the default 6 dB setting.

I know that even my 585 wouldn't be able to cope with a 3 dB setting as my SNR usually drops to 4 dB in the evenings on 6 dB (default setting)!

If it's stable at 6dB then it should be ok. Mine runs for weeks at 6dB without dropping sync & has been know to drop to 4dB for days without problems.

Its a lack of bandwidth at entanet, this weekends been pretty bad at times. I've seen it dip below 100kb/s and i'm sync'd at 7776kbps.