New max rate?

Well I recently looked at my line stats and basically my snr is always 11, sync is always 7616, max rate is always around 8128 but it's interleaved.
What I'm wondering is since yesterday my snr has increased to 15 and usually when it does my sync drops to around 7000, this time it has stayed at 7616 but my max rate is now around 9000.
Not knocking it but has my line randomly improved? my attenuation is 27.7 and hasn't increased so I don't think Ive been moved to 21cn, anyway heres my line stats in a better prospective

Rate: 7616 kbs 832 kbs
Max Rate: 9480 kbs 1088 kbs
Noise Margin: 15.0 dB 14.0 dB
Attenuation: 27.7 dB 18.0 dB

Yes, you have been moved to the WBC/WBMC (21CN) equipment in your exchange, but with an "up to 8Mbps" (G.DMT) profile on it. Don't confuse that with IP Profile.

Most ISPs do that initially, then at some stage upgrade the customer to full ADSL2+. If you contact them you might get it done almost immediately. A very few ISPs do charge more for it though.

You would be looking at a connection speed of 17Mbps or so on ADSL2+. Over 1Mbps upload unless yours is one of those that slug it.

Edited by RobertoS (Fri 27-Jan-12 12:51:11)

Even though the RFS date is 30.08.12?

Umm. Odd. Maybe I'm wrong. Which ISP is it? With some you can tell from your control panel if you know what you are looking for. They should be able to tell you anyway .

The attenuation doesn't mean much in such cases, as the G.DMT profile would keep it as before.

It's BT, I was planning on ringing them but figured I'd get "We cant give out this information" so I didnt bother.

Just restarted my router to see if it would do anything, my snr went back down to 11 and my max rate is back at 8252 kbs :/

Edited by deleted (Fri 27-Jan-12 17:05:56)

You'll probably find if you do a restart well inside daylight hours the max rate and noise margin will both increase again. That's normal because the base noise level is lower then.

Sorry about misunderstanding the stats before.

Im surprised ISP's would automatically put customers on adsl2+, as you need a compatible router for that. People who arent tech savy could have problems then

What happens if you're on adsl2+ without an adsl2+ compatible router?

Edited by bobble_bob (Sat 28-Jan-12 08:28:59)

What happens if you're on adsl2+ without an adsl2+ compatible router?

Then I guess your ISP identifies this when you ring in, and advises you. There was an old router in our exchange, non ADSL2+ compatible, it worked fine but would only negotiate 8128 sync, when we eventually swapped it the new one synced at 24 meg !

A little later on in the thread, it looks like just a glitch, with 832 upstream I'd reckon the OP was still on a Max Premium service.

Isn't Max rate a Theortetical Attainable rate on ADSL(1).? When I was on ADSL(1) I used to get a Max rate of around 10000kbps but sync was always 8128 fast path.

In reply to a post by bobble_bob:

Im surprised ISP's would automatically put customers on adsl2+, as you need a compatible router for that. People who arent tech savy could have problems then

Maybe you'd better ring them all then and check. I'm 99.9% sure I am right wrt the majority of ISPs and will continue to post as earlier until proven wrong .

As Zarjaz says, the user with an non-ADSL2+ router wouldn't see a problem. The MSAN would just negotiate down.

A lot of routers calculate the Max Rate using the real specification of ADSL. That says 12Mbps. For whatever reason BT Wholesale cap it at 8128Mbps, which isn't even 8Mbps.

Ive no doubt you're right. I wasnt aware a non adsl2+ router would work with adsl2+. I asssumed it wouldnt even connect, hence the problems

Cheers.

You've been reading wiki's again.

ADSL was always 8Meg limit, ADSL2 is 12Meg, just that it has been around long enough in its pre-standard format that its deployment in some countries meant it was just called ADSL.

I wasnt aware a non adsl2+ router would work with adsl2+ [[i]sic]

You won't get ADSL2+ speeds so in one sense it doesn't work but you can manually try and make it sync on G.DMT (ADSL1 on a CN exchange) if it doesn't occur automatically because of the firmware within the router.

Mac

The exchange DSLAM/MSAN will train down to what it sees at the other end.

lines are backwards compatible. Exchange will ask for adsl2+, then adsl2, then ADSL until something connects. The end user does not need to change their router, but even so most have been adsl2+ compatible for years, so I would expect yours to be.

Edited by iand (Sat 28-Jan-12 16:59:53)

It wouldn't cause problems

Whilst the ADSL 2 + incompatible router was in use, it wouldn't use this

As soon as a compatible router was plugged in it would presumably switch to it.

It will recognise the router doesn't support it and switch to whatever accordingly.

Ian and ukhardy

I think bobble accepted what I said, effectively the same as the two of you have now said to him.

It's the later Anon poster who still got it wrong, when he apparently contradicted me.

Sorry to repeat you buddy! Had a quick scan through

Everyone beats me to the posts