Technical Discussion
  >> Technical Issues


Register (or login) on our website and you will not see this ad.


  Print Thread
Standard User Michael_Chare
(committed) Fri 02-Mar-12 13:34:38
Print Post

Can a modem choose ADSL2 or ADSL, on 21CN?


[link to this post]
 
If I am connected to BT 21CN equipment and my line is configured for ADSL2+, what happens if I set my modem to only use ADSL2 or just ADSL? Would the modem connect at these alternatives?

Given that I have a long line with a > 60 db loss, is there any reason not to request that my line is set to ADSL2+ and then choose what ever option I find works best?

Michael Chare
Standard User XRaySpeX
(eat-sleep-adslguide) Fri 02-Mar-12 13:44:01
Print Post

Re: Can a modem choose ADSL2 or ADSL, on 21CN?


[re: Michael_Chare] [link to this post]
 
Should work! Suck it & see!

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 19 Meg WBC
Standard User john2007
(legend) Fri 02-Mar-12 15:03:02
Print Post

Re: Can a modem choose ADSL2 or ADSL, on 21CN?


[re: XRaySpeX] [link to this post]
 
I seem to remember trying one time on my Be/O2 LLU line. It gave me much less sync.

Just tried again.

On BT (Newnet, Virgin) synced at 8128 kbps on ADSL1.

On LLU (O2/Be) synced at 8188 kbps on ADSL2+. (I am rate limited, if I pay extra the sync would be 16 Mbps+)

On LLU (02/Be) synced at 3520 kbps on ADSL1.

I don't know why.


Register (or login) on our website and you will not see this ad.

Standard User XRaySpeX
(eat-sleep-adslguide) Fri 02-Mar-12 16:18:31
Print Post

Re: Can a modem choose ADSL2 or ADSL, on 21CN?


[re: Michael_Chare] [link to this post]
 
Using a Netgear DG834GT on a shortish Orange 21CN WBC line:
ADSL:
ADSL Link Downstream Upstream
Connection Speed 8128 kbps 1152 kbps
Line Attenuation 23.0 db 13.5 db
Noise Margin 15.3 db 7.0 db
ADSL2:
ADSL Link Downstream Upstream
Connection Speed 11466 kbps 1211 kbps
Line Attenuation 22.5 db 13.8 db
Noise Margin 3.6 db 6.4 db
ADSL2+:
ADSL Link Downstream Upstream
Connection Speed 19062 kbps 1195 kbps
Line Attenuation 26.0 db 13.9 db
Noise Margin 3.3 db 5.9 db


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 19 Meg WBC
Standard User Michael_Chare
(committed) Fri 02-Mar-12 16:36:29
Print Post

Re: Can a modem choose ADSL2 or ADSL, on 21CN?


[re: XRaySpeX] [link to this post]
 
In reply to a post by XRaySpeX:
Should work! Suck it & see!
I was trying make sure that I don't shoot myself in the foot if it does not work.

It is quite possible that I will just be given an ADSL connection on 21CN because of the high loss on my line. I just want to be sure that I can easily revert to ADSL if I ask the ISP to enable ADSL2+

Thanks for your other post. I will take the chance.

Michael Chare
Standard User Jessica1234
(newbie) Tue 13-Mar-12 12:33:48
Print Post

Re: Can a modem choose ADSL2 or ADSL, on 21CN? *DELETED*


[re: Michael_Chare] [link to this post]
 
Post deleted by MrSaffron

Edited by Jessica1234 (Tue 13-Mar-12 12:34:11)

Administrator MrSaffron
(staff) Tue 13-Mar-12 13:12:17
Print Post

Re: Can a modem choose ADSL2 or ADSL, on 21CN? *DELETED*


[re: Jessica1234] [link to this post]
 
Spam deleted

Andrew Ferguson, andrew@thinkbroadband.com
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 Michael_Chare
(committed) Tue 13-Mar-12 14:17:56
Print Post

Re: Can a modem choose ADSL2 or ADSL, on 21CN?


[re: XRaySpeX] [link to this post]
 
I now have a 21CN connection. My Technicolor 582n says it is connected using ADSL2 even though I have tried to force plain ADSL by entering "xdsl config adslmultimode=ADSL" It is quite likely that the ISP has set ADSL2 rather than ADSL2+ because of my 62db downstream line loss.

My connection speed of about 1700kbps is very much the same as it was on 20CN, but I do benefit from the 21CN algorithm for setting the IP profile.

Michael Chare
  Print Thread

Jump to