DSL Max Question

Indy500 · 22 Apr 2006 at 14:04

CurlyWhirly said:
According to your screenshot you are on a 2 Mb service (not 1 Mb)

Nope. The router syncs above the actual speed I get.

CurlyWhirly · 22 Apr 2006 at 21:07

sr4470 said:
Nope. The router syncs above the actual speed I get.

I'm a bit confused by this :confused:

So when you go on Max DSL you can actually sync at 8 Mb but for the first few days are limited to 2 Mb then?

I expect this gives RAMBO enough time to work out whether your line is stable at this speed and if so then it gradually increases the speed in 0.5 Mb increments until it comes to a point when your line suffers disconnections and then it stops increasing the speed and reassesses your line again.

Indy500 · 22 Apr 2006 at 21:08

CurlyWhirly said:
I'm a bit confused by this

So when you go on Max DSL you can actually sync at 8 Mb but for the first few days are limited to 2 Mb then?

I expect this gives RAMBO enough time to work out whether your line is stable at this speed and if so then it gradually increases the speed in 0.5 Mb increments until it comes to a point when your line suffers disconnections and then it stops increasing the speed and reassesses your line again.

I'm not on Max yet.

CurlyWhirly · 22 Apr 2006 at 21:10

sr4470 said:
I'm not on Max yet.

Now I am confused!

Not to worry nothing new

Indy500 · 22 Apr 2006 at 21:11

CurlyWhirly said:
Now I am confused!

Not to worry nothing new

E7 have it like that. Never get the extra speed, no idea why they bothered.

benjo plz. · 22 Apr 2006 at 21:20

sr4470 said:
E7 have it like that. Never get the extra speed, no idea why they bothered.

Yeh, they give you a 2mb connection, then shape your connection using radius.

Indy500 · 22 Apr 2006 at 21:21

Phnom_Penh said:
Yeh, they give you a 2mb connection, then shape your connection using radius.

Only paid for 1mb anyway.

tolien · 22 Apr 2006 at 21:22

CurlyWhirly said:
So when you go on Max DSL you can actually sync at 8 Mb but for the first few days are limited to 2 Mb then?

In theory, the data rate should increase quicker, but yes.

I expect this gives RAMBO enough time to work out whether your line is stable at this speed and if so then it gradually increases the speed in 0.5 Mb increments until it comes to a point when your line suffers disconnections and then it stops increasing the speed and reassesses your line again.

Not even close.
The data rate (which is the 2Mbps bit, and should eventually change) isn't connected to your sync rate (which varies with your SNR margin, and so could change much more frequently).
Changing the data rate doesn't make your connection more or less stable - it just changes the amount of IP throughput you get.

Nope. The router syncs above the actual speed I get.

That isn't particularly significant. What is significant when it comes to thinking about what you'd get with Max is your sync rate - whether you're then throttled to 1Mbps or whatever at your ISP.

Indy500 · 22 Apr 2006 at 21:29

tolien said:
That isn't particularly significant. What is significant when it comes to thinking about what you'd get with Max is your sync rate - whether you're then throttled to 1Mbps or whatever at your ISP.

Not sure theres any point when my exchange is being ADSL2 enabled in a few months.

tolien · 22 Apr 2006 at 21:32

Same rules apply *shrug*
What you get depends on sync rate, not IP throttling at ISP end.

smids · 22 Apr 2006 at 21:40

Sorry for the OT but this got me thinking (what you just said tolien ^^^) - one of my neighbours has AOL and they have worse line stats than mine above ^^^ but they have 2MB whereas my better line (4dB better Attn, 7.5dB better SNR - however it's obvious their SNR will be lower) is limited to 1MB. Are they just syncing higher (they don't have Max) and capped or would that be their speed? Sorry, I was just confused - I mean how did they get 2MB?

tolien · 22 Apr 2006 at 21:42

The Guesstimator isn't always right.

smids · 22 Apr 2006 at 21:52

tolien said:
The Guesstimator isn't always right.

Quite clearly

- I mean it said I'd need an engineer visit for 1MBit when clearly I can hit 3-4Mbit without issue. I know lots of people had failed 2MB lines (and the reason BT implemented such a stringent compliance?) but that's their fault for using the consumer fad of USB modems with poor chipsets etc. Oh well, I'm glad Max is here!

tolien · 22 Apr 2006 at 21:57

It's possible it was wrong (impossible to say without accurate stats).

On the other hand, there weren't many folks complaining about sync loss with the old system (barring a tiny percentage of false greens), and there's a distinction between how feasible the "suck it and see" mentality is with a few tens of thousands and a few million lines...

smids · 22 Apr 2006 at 22:05

tolien said:
It's possible it was wrong (impossible to say without accurate stats).

On the other hand, there weren't many folks complaining about sync loss with the old system (barring a tiny percentage of false greens), and there's a distinction between how feasible the "suck it and see" mentality is with a few tens of thousands and a few million lines...

My stats were accurate as I asked my ISP - in actual fact, they said my Attn was lower than my router reported, I believe they said 45dB Attn and I failed the 2Mbps by 2dB - I'm thinking I've been screwed and they were solely relying on the BT Guesstimator which said, as I've said above, that I'd need an engineer for even 1Mbit - oh well, more reason to migrate from +net.

CurlyWhirly · 22 Apr 2006 at 22:10

tolien said:
Not even close.
The data rate (which is the 2Mbps bit, and should eventually change) isn't connected to your sync rate (which varies with your SNR margin, and so could change much more frequently).
Changing the data rate doesn't make your connection more or less stable - it just changes the amount of IP throughput you get.

I'm a bit confused here as if the amount of IP throughput (i.e. download speed) doesn't make the connection more or less stable then what does :confused:

Also does the sync rate change after the 10 day bedding-in period or is it stored in a RAMBO profile where it never changes again?
In other words does Max DSL continue to be 'dynamic' after the 10 day period or is your line speed fixed after this?

I would guess that your profile is fixed after this time as it would mean less work for BT Wholesale with perhaps only new Max DSL connections being 'dynamic'?

smids said:
but that's their fault for using the consumer fad of USB modems with poor chipsets etc. Oh well, I'm glad Max is here!

Yes I am glad I upgraded to a router now to take full advantage of Max DSL.

tolien · 22 Apr 2006 at 22:14

Your ISP only sees what your modem reports. If your wiring's dodgy (as your post seemed to imply), and for whatever reason your attenuation's jumping through the roof as a result of that, then the ISP will only see that too.

45dB > 43dB, so you're out of range, by the old prequalification rules. The End.

I'm a bit confused here as if the amount of IP througput (i.e. download speed) doesn't make the connection more or less stable then what does

The sync rate...

Also does the sync rate change after the 10 day bedding-in period or is it stored in a RAMBO profile somewhere where it never changes again?

It'll continue to change.

In other words does Max DSL continue to be 'dynamic' after the 10 day period or is your line speed fixed after this?

The former.

I would guess that your profile is fixed after this time as it would mean less work for BT Wholesale with perhaps only new Max DSL connections being 'dynamic'?

You guess wrong. The 10 days is to identify some kind of "maximum" for fault reporting.

CurlyWhirly · 22 Apr 2006 at 23:44

Thanks yet again Tolien

I do understand Max DSL a little better now with your help.