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Standard User swayzak
(learned) Mon 03-Oct-11 13:36:22
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ADSL vs ADSL 2 ?


[link to this post]
 
Hi

During O2's protracted investigation into my line dropouts, I discovered that ADSL gives me faster connection than ADSL2.

Hopefully the problem is now sorted (line changed between local exchange & my green box).

I've asked O2 to keep me on ADSL, due it performance increase & the fact that I'm never going to get anywhere near 8MB on this line.

Are there any disadvantages to ADSL compared to ADSL2 I should be aware of ?


thanks
Standard User burakkucat
(committed) Mon 03-Oct-11 14:06:51
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Re: ADSL vs ADSL 2 ?


[re: swayzak] [link to this post]
 
Are there any disadvantages to ADSL compared to ADSL2 I should be aware of ?
No, none at all.

That said, it would be an idea for you to post your current modem/router statistics (sync speed, attenuation and SNRM) so that the resident wizards can confirm that you are obtaining the best service that your line can provide.

-----------------------------------------------------

100% Linux and, previously, Unix.
Standard User XRaySpeX
(knowledge is power) Mon 03-Oct-11 14:10:54
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Re: ADSL vs ADSL 2 ?


[re: swayzak] [link to this post]
 
Depends on your attenuation. Post your router stats and we can say more.

But do you really mean ADSL2 (without the +) or ADSL2+?

Usually on long lines ADSL2 is faster than ADSL2+.

1999: Freeserve 48K Dial-Up => 2005: Wanadoo 1 Meg BB => 2007: Orange 2 Meg BB => 2008: Orange 8 Meg LLU => 2010: Orange 16 Meg LLU => 2011: Orange 17 Meg Untweaked 19 Meg Tweaked WBC


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Administrator MrSaffron
(staff) Mon 03-Oct-11 14:11:48
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Re: ADSL vs ADSL 2 ?


[re: swayzak] [link to this post]
 
ADSL up to 8 Meg
ADSL2 up to 12 Meg, same frequencies as ADSL and generally as reliable
ADSL2+ up to 24Meg, on non-noisy short lines great, on long noisy lines less so.

Did you mean the + variant out of the three?

Andrew Ferguson, [email protected]
www.thinkbroadband.com - formerly known as ADSLguide.org.uk
The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.
Standard User swayzak
(learned) Mon 03-Oct-11 14:30:58
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Re: ADSL vs ADSL 2 ?


[re: burakkucat] [link to this post]
 
Thank you all

I'm almost certain it's ADSL (not 2 or 2+) as the reason I selected this option was that I'm never going to get near 8MB on this line (sync speed is just over 5) & ADSL increased my d/l speed to about 4.5 (from previous 3.8).

Will post my speedtest.net figures this evening.
Standard User XRaySpeX
(knowledge is power) Mon 03-Oct-11 14:36:11
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Re: ADSL vs ADSL 2 ?


[re: swayzak] [link to this post]
 
In reply to a post by swayzak:
I'm almost certain it's ADSL (not 2 or 2+)
Yes, but I meant are you comparing it with ADSL2 or ADSL2+?

Don't bother with speedtest figures; they are not relevant to the point. Just post your router stats.

1999: Freeserve 48K Dial-Up => 2005: Wanadoo 1 Meg BB => 2007: Orange 2 Meg BB => 2008: Orange 8 Meg LLU => 2010: Orange 16 Meg LLU => 2011: Orange 17 Meg Untweaked 19 Meg Tweaked WBC
Standard User swayzak
(learned) Mon 03-Oct-11 15:12:46
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Re: ADSL vs ADSL 2 ?


[re: XRaySpeX] [link to this post]
 
In reply to a post by XRaySpeX:
In reply to a post by swayzak:
I'm almost certain it's ADSL (not 2 or 2+)
Yes, but I meant are you comparing it with ADSL2 or ADSL2+?

Don't bother with speedtest figures; they are not relevant to the point. Just post your router stats.


OK - will do.

As far as I know O2 only offered me ADSL2+ or ADSL...
Administrator MrSaffron
(staff) Mon 03-Oct-11 15:28:37
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Re: ADSL vs ADSL 2 ?


[re: swayzak] [link to this post]
 
In terms of them controlling settings yes that is what most providers do, but assumming you have access to the router, you can force one of the three modes.

So yes on long lines not unusual to get a little better from ADSL2+ to ADSL, in theory should not be worse, but reality shows small differences.

Andrew Ferguson, [email protected]
www.thinkbroadband.com - formerly known as ADSLguide.org.uk
The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.
Standard User XRaySpeX
(knowledge is power) Mon 03-Oct-11 17:37:36
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Re: ADSL vs ADSL 2 ?


[re: MrSaffron] [link to this post]
 
In reply to a post by MrSaffron:
get a little better from moving from ADSL2+ to ADSL
is what you mean?

Or did you mean "better from ADSL2 rather than ADSL"?

1999: Freeserve 48K Dial-Up => 2005: Wanadoo 1 Meg BB => 2007: Orange 2 Meg BB => 2008: Orange 8 Meg LLU => 2010: Orange 16 Meg LLU => 2011: Orange 17 Meg Untweaked 19 Meg Tweaked WBC
Standard User swayzak
(learned) Mon 03-Oct-11 21:44:27
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Re: ADSL vs ADSL 2 ?


[re: burakkucat] [link to this post]
 
In reply to a post by burakkucat:
Are there any disadvantages to ADSL compared to ADSL2 I should be aware of ?
No, none at all.

That said, it would be an idea for you to post your current modem/router statistics (sync speed, attenuation and SNRM) so that the resident wizards can confirm that you are obtaining the best service that your line can provide.


I'm looking through the O2 II box web interface - can't see that data. Where do I find that info ?
Standard User yarwell
(sensei) Tue 04-Oct-11 16:06:24
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Re: ADSL vs ADSL 2 ?


[re: swayzak] [link to this post]
 
Are there any disadvantages to ADSL compared to ADSL2 I should be aware of ?


only that it should go slower and maybe be a bit less robust.

Obviously the equipment you and the ISP were using didn't make a very good job of it between them but there are features in ADSL2 that should give faster speeds.

I get 600k more downstream and 100k more upstream on ADSL2 compared to ADSL from Talk Talk LLU (5400 vs 4800)

Phil

MaxDSL - goes as fast as it can and doesn't read the line checker first.

MaxDSL diagnostics
Are your kids pirates ? Limewire, Bearshare, Kazaa, BitTorrent, eMule are all tools of the trade.
Administrator MrSaffron
(staff) Tue 04-Oct-11 17:07:43
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Re: ADSL vs ADSL 2 ?


[re: XRaySpeX] [link to this post]
 
Try a rephrase...

We have seen cases where lines running ADSL2+ if dropped to ADSL only mode can perform better sync/stability wise.

Now if the ISP knows what ADSL2 is (rare) then dropping to that mode should be the same as ADSL mode, with the same sync.

It is all down to the individual line, noise environment, exchange and consumer hardware, so no firm rules in this area.

Andrew Ferguson, [email protected]
www.thinkbroadband.com - formerly known as ADSLguide.org.uk
The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.
Standard User swayzak
(learned) Tue 04-Oct-11 19:46:21
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Re: ADSL vs ADSL 2 ?


[re: yarwell] [link to this post]
 
In reply to a post by yarwell:
Are there any disadvantages to ADSL compared to ADSL2 I should be aware of ?


only that it should go slower and maybe be a bit less robust.

Obviously the equipment you and the ISP were using didn't make a very good job of it between them but there are features in ADSL2 that should give faster speeds.

I get 600k more downstream and 100k more upstream on ADSL2 compared to ADSL from Talk Talk LLU (5400 vs 4800)


?

ADSL is definitely faster than ADSL 2+ for me (4.6 d/l vs 3.8 d/l) - hence my request to O2 to keep me on ADSL profile.

Robustness will be tested over coming weeks wink
Standard User swayzak
(learned) Thu 06-Oct-11 20:18:26
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Re: ADSL vs ADSL 2 ?


[re: MrSaffron] [link to this post]
 
OK - finally logged in as SuperUser & got this:


DSL Connection

Link Information

Uptime: 2 days, 0:35:14
DSL Type: G.992.1 annex A
Channel mode: Interleave
Maximum Bandwidth (Up/Down) [kbps/kbps]: 1,233 / 5,191
Bandwidth (Up/Down) [kbps/kbps]: 1,038 / 4,638
Data Transferred (Sent/Received) [kB/kB]: 0.00 / 0.00
Output Power (Up/Down) [dBm]: 12.0 / 19.0
Line Attenuation (Up/Down) [dB]: 31.5 / 52.0
SN Margin (Up/Down) [dB]: 7.0 / 6.0
Vendor ID (Local/Remote): TMMB / BDCM
Loss of Framing (Local/Remote): 22 / 0
Loss of Signal (Local/Remote): 2 / 0
Loss of Power (Local/Remote): 0 / 0
Loss of Link (Remote): 0
Error Seconds (Local/Remote): 39 / 0

FEC Errors (Up/Down): 1,119 / 242,047,586
CRC Errors (Up/Down): 1,119 / 1,288
HEC Errors (Up/Down): 540 / 973


How does this look ?
Standard User mistral
(experienced) Thu 06-Oct-11 23:33:25
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Re: ADSL vs ADSL 2 ?


[re: swayzak] [link to this post]
 
In reply to a post by swayzak:
Hi

During O2's protracted investigation into my line dropouts, I discovered that ADSL gives me faster connection than ADSL2.

Hopefully the problem is now sorted (line changed between local exchange & my green box).

I've asked O2 to keep me on ADSL, due it performance increase & the fact that I'm never going to get anywhere near 8MB on this line.

Are there any disadvantages to ADSL compared to ADSL2 I should be aware of ?


thanks


I should really point out that there is ADSL / ADSL2 / ADSL2+

ADSL is also limited to 768kbit upstream compared with the ADSL2+ of 1mbit is quite a common upstream. 1mbit up is common on lines syncing as low as 7-8mbit.

I had a problem with adsl being faster than adsl2+ it turned out to be a firmware issue and incompatible kit between the exchange and the router. Was 6mbit adsl turned into 12mbit adsl2+ after changes. adsl2+ before was 5mbit...

Also the ring wire hack can sort out the adsl2+ problems. After this I went from 12mbit to 16mbit.

Administrator MrSaffron
(staff) Fri 07-Oct-11 10:20:21
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Re: ADSL vs ADSL 2 ?


[re: swayzak] [link to this post]
 
So its ADSL mode and at 52dB attenuation

Your 4648 is pretty much what one would expect for that amount of attenuation. With little or no gain by going to ADSL2+.

The FEC errors while have been corrected, are a high and may be affecting the throughput. Have you removed the ring wire?

Andrew Ferguson, [email protected]
www.thinkbroadband.com - formerly known as ADSLguide.org.uk
The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.
Standard User swayzak
(learned) Fri 07-Oct-11 10:23:33
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Re: ADSL vs ADSL 2 ?


[re: MrSaffron] [link to this post]
 
In reply to a post by MrSaffron:
So its ADSL mode and at 52dB attenuation

Your 4648 is pretty much what one would expect for that amount of attenuation. With little or no gain by going to ADSL2+.

The FEC errors while have been corrected, are a high and may be affecting the throughput. Have you removed the ring wire?


Thanks

What's the ring wire ?

I disconnected the master socket from the 2 wires connecting to rest of house sockets (?blue & green).
Administrator MrSaffron
(staff) Fri 07-Oct-11 10:25:13
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Re: ADSL vs ADSL 2 ?


[re: swayzak] [link to this post]
 
Blue and green, old colour names, sounds like the external drop wire cable.

http://www.thinkbroadband.com/faq/sections/radsl.htm...

Andrew Ferguson, [email protected]
www.thinkbroadband.com - formerly known as ADSLguide.org.uk
The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.
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