25-01-2007, 22:07
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#61
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Cable Forum Team
Join Date: Jun 2003
Location: Cambridge
Age: 31
Services: Freeview, Sky+HD, Sky Broadband "Max", BT phone
Posts: 10,679
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Re: SKY broadband 16mbit
Got my MAC on Tuesday, so have now signed up to Sky's 16meg "Max" service 
Now waiting for the router to arrive, & the migration to take place.......
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25-01-2007, 22:11
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#62
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Resistance is Futile
Join Date: Mar 2005
Location: The Twilight Zone Cambridge
Age: 40
Services: 20mbit all the time. Whipped cream and massage if you ask nicely.
Posts: 3,644
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Re: SKY broadband 16mbit
Quote:
Originally Posted by Matt D
Got my MAC on Tuesday, so have now signed up to Sky's 16meg "Max" service
Now waiting for the router to arrive, & the migration to take place....... |
How close to the exchange are you? I Live a few miles up the A14 from Cambridge, so i have to stick with NTL although it's faultless in speed where i am.
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25-01-2007, 22:18
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#63
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Cable Forum Team
Join Date: Jun 2003
Location: Cambridge
Age: 31
Services: Freeview, Sky+HD, Sky Broadband "Max", BT phone
Posts: 10,679
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Re: SKY broadband 16mbit
Quote:
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Originally Posted by SamKnows
You are approximately 1.48km from the exchange (straight line distance).
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Currently have 2meg ADSL.
Not expecting the full 16meg...faster than 2 meg + no usage limit + saving of £15pcm will still make me happy.
I would've happily stayed with ntl when I moved last January (I'd had ntl for years), but I'm in a non-cable area now.
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25-01-2007, 22:51
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#64
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Resistance is Futile
Join Date: Mar 2005
Location: The Twilight Zone Cambridge
Age: 40
Services: 20mbit all the time. Whipped cream and massage if you ask nicely.
Posts: 3,644
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Re: SKY broadband 16mbit
Quote:
Originally Posted by Matt D
Currently have 2meg ADSL.
Not expecting the full 16meg...faster than 2 meg + no usage limit + saving of £15pcm will still make me happy.
I would've happily stayed with ntl when I moved last January (I'd had ntl for years), but I'm in a non-cable area now.
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Actually in Cambridge or a Village like me? 
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25-01-2007, 22:57
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#65
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Cable Forum Team
Join Date: Jun 2003
Location: Cambridge
Age: 31
Services: Freeview, Sky+HD, Sky Broadband "Max", BT phone
Posts: 10,679
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Re: SKY broadband 16mbit
Quote:
Originally Posted by SnoopZ
Actually in Cambridge or a Village like me? |
Still in Cambridge, but a recent-ish development which never got cabled 
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26-01-2007, 05:34
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#66
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cf.mega poster
Join Date: Sep 2003
Location: Leics
Age: 29
Services: none
Posts: 5,674
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Re: SKY broadband 16mbit
Quote:
Originally Posted by Matt D
Currently have 2meg ADSL.
Not expecting the full 16meg...faster than 2 meg + no usage limit + saving of £15pcm will still make me happy.
I would've happily stayed with ntl when I moved last January (I'd had ntl for years), but I'm in a non-cable area now.
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good luck 1.48 isnt that short for straight line (I am 1.65 and get 4mbit) but if your line is fairly direct route and of good quality it can perform well and you can synch above 8mbit. The fact you had fixed 2meg probably means your line has attenuation below 43db and should hopefully give at least 8mbit.
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26-01-2007, 09:39
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#67
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cf.addict
Join Date: May 2006
Posts: 108
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Re: SKY broadband 16mbit
I have just switched to sky (Have both sky and NTL running at the moment)
happy with the speed etc only thing I can moan about is the length of the IP lease. Changes about once a week. Which makes it hard for running servers etc
But you can get around it, you kinda get spoilt with NTL IP not changing in around 6 months! haha
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26-01-2007, 22:23
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#68
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Cable Forum Team
Join Date: Jun 2003
Location: Cambridge
Age: 31
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Posts: 10,679
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Re: SKY broadband 16mbit
Quote:
Originally Posted by Chrysalis
good luck 1.48 isnt that short for straight line (I am 1.65 and get 4mbit) but if your line is fairly direct route and of good quality it can perform well and you can synch above 8mbit. The fact you had fixed 2meg probably means your line has attenuation below 43db and should hopefully give at least 8mbit.
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Always had fixed 2meg, still on normal ADSL - didn't regrade to ADSLmax as my small ISP didn't offer it until later & I think it'd have meant a new contract.
Current router stats:
Downstream Line Attenuation 39 db, downstream Noise Margin 10 db.
Not sure whether ADSL2+ can stretch much more out of that than bog-standard ADSL or ADSLmax (RADSL?)... don't know much about ADSL.
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26-01-2007, 23:29
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#69
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Join Date: Sep 2006
Location: Midlands
Services: Sky +,
O2 Broadband,
20mb down and 1.3mb up,
Sky Talk,
Freeview from Sutton Coldfield
Posts: 698
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Re: SKY broadband 16mbit
Quote:
Originally Posted by Matt D
Always had fixed 2meg, still on normal ADSL - didn't regrade to ADSLmax as my small ISP didn't offer it until later & I think it'd have meant a new contract.
Current router stats:
Downstream Line Attenuation 39 db, downstream Noise Margin 10 db.
Not sure whether ADSL2+ can stretch much more out of that than bog-standard ADSL or ADSLmax (RADSL?)... don't know much about ADSL.
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Based on your line attenuation you will get between 8-12mb
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27-01-2007, 03:59
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#70
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cf.mega poster
Join Date: Sep 2003
Location: Leics
Age: 29
Services: none
Posts: 5,674
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Re: SKY broadband 16mbit
Quote:
Originally Posted by Matt D
Always had fixed 2meg, still on normal ADSL - didn't regrade to ADSLmax as my small ISP didn't offer it until later & I think it'd have meant a new contract.
Current router stats:
Downstream Line Attenuation 39 db, downstream Noise Margin 10 db.
Not sure whether ADSL2+ can stretch much more out of that than bog-standard ADSL or ADSLmax (RADSL?)... don't know much about ADSL.
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You are still on fixed 2 meg now?
your attenuations suggests speeds as Be* suggested but your noise margin is very poor, you have 10db on 2megabit which doesnt leave much scope for more speed.
Lower speeds normally have high noise margins on good lines and as you increase the synch speed noise margin is sacrificed usually people who achieve 8mbit will normally have around 30db noise margin on 2mbit. Is it possible to get your output power stats as it could be the dslam is pumping out the signal at low power hence your low snr margin.
My guess is you are using a extension socket for the adsl or you have extension sockets and you have ring wire interference (more info on adslguide) but with those stats it doesnt look great (ok attenuation, poor noise margin).
6db is considered the lowest for a stable connection and only if there isnt much interference, 10db which you have now isnt particurly high.
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27-01-2007, 04:29
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#71
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Cable Forum Team
Join Date: Jun 2003
Location: Cambridge
Age: 31
Services: Freeview, Sky+HD, Sky Broadband "Max", BT phone
Posts: 10,679
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Re: SKY broadband 16mbit
Quote:
Originally Posted by Be*
Based on your line attenuation you will get between 8-12mb
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That's fine for me
Quote:
Originally Posted by Chrysalis
You are still on fixed 2 meg now?
your attenuations suggests speeds as Be* suggested but your noise margin is very poor, you have 10db on 2megabit which doesnt leave much scope for more speed.
Lower speeds normally have high noise margins on good lines and as you increase the synch speed noise margin is sacrificed usually people who achieve 8mbit will normally have around 30db noise margin on 2mbit. Is it possible to get your output power stats as it could be the dslam is pumping out the signal at low power hence your low snr margin.
My guess is you are using a extension socket for the adsl or you have extension sockets and you have ring wire interference (more info on adslguide) but with those stats it doesnt look great (ok attenuation, poor noise margin).
6db is considered the lowest for a stable connection and only if there isnt much interference, 10db which you have now isnt particurly high.
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Yeah, had ADSL for almost 1 year, & been on fixed 2meg the whole time.
How'd I find the output power stats? Is that just the upstream attenuation & upstream margin?
Upstream Attenuation: 12.5 db
Upstream Noise Margin: 30 db
Extension socket - yep.
The master is in the hall.
The modem/router is plugged into an extension socket in the lounge (Sky STB is also plugged into the same socket). There's another extension the other side of the lounge, with a DECT phone plugged in, & an extension in the bedroom, with nothing plugged in.
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28-01-2007, 03:05
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#72
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cf.mega poster
Join Date: Sep 2003
Location: Leics
Age: 29
Services: none
Posts: 5,674
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Re: SKY broadband 16mbit
the power stats will be reported by your router somewhere, not all routers may show it but even the router aol provide show the stats.
Rather then looking for it try this.
Move the router to the master socket then recheck the stats to see if the downstream noise margin goes up, if it shoots up you all good and the line is capable and you have found the problem.
Although attenuation is a good guide to the general line distance and quality it isnt the be all and end all and the ultimate deciding factor is the noise margin, your noise margin is poorer then mine, I would probably have over 20db on a 2mbit synch.
I entered your values in the speed estimator on dsl zone website.
The adsl2+ checker only uses attenutation and assumes the noise margin is healthy and rated you at 8-12mbit.
The adsl1 checker also uses the noise margin and gives this for your line stats.
"Based on the values you entered, we estimate that your line can support around 2.3 - 3.0 Mbps"
I wouldnt panic yet tho, the chances are the problem is local and will improve when using the master socket.
http://www.dslzoneuk.net/maxspeed.php
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28-01-2007, 23:46
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#73
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Cable Forum Team
Join Date: Jun 2003
Location: Cambridge
Age: 31
Services: Freeview, Sky+HD, Sky Broadband "Max", BT phone
Posts: 10,679
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Re: SKY broadband 16mbit
Hmm. I'll give it a go, although using the master would be a pain. We'd be tripping over the router every time we came in or went out.
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29-01-2007, 10:18
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#74
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cf.mega poster
Join Date: Sep 2003
Location: Leics
Age: 29
Services: none
Posts: 5,674
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Re: SKY broadband 16mbit
There are ways to make it work properly via extension sockets, but this is the easiest way to hunt down why your nosie margin is low.
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29-01-2007, 11:04
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#75
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cf.mega poster
Join Date: Jan 2004
Posts: 3,424
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Re: SKY broadband 16mbit
Quote:
Originally Posted by Chrysalis
There are ways to make it work properly via extension sockets, but this is the easiest way to hunt down why your nosie margin is low.
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depends on the line though on mine i get a stable 7.6mbit sync (dslmax) if i plug it into the master socket or the extension.
So i use the extension becuase theres not a power socket within easy reach of the master socket
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