How can I tell if I am on ADSL2 or not...(and other problems!)
- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Bookmark
- Subscribe
- Printer Friendly Page
- Plusnet Community
- :
- Forum
- :
- Help with my Plusnet services
- :
- Broadband
- :
- How can I tell if I am on ADSL2 or not...(and othe...
How can I tell if I am on ADSL2 or not...(and other problems!)
11-11-2012 10:42 AM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
As per subject, I'm wondering how I can tell as we were supposely migrated across 21CN on the Portishead exchange last month.
I discovered this when our web browsing came to a halt - (curiously akin to losing DNS)... sync and connection was there at 8Mbps but not a lot else. Changing the router from G.DMT ADSL2 or 2+ (G992.3 or G992.5) or multimode (i.e. auto) picked up ADSL2+ and conection and browsing worked once again. So far so good, however......
So having had a disconnect recently whilst on "auto" I was surprised to have problems browsing again, so checked the router status. It was showing G.DMTas the ADSL mode again. Double checked the setting - it was multimode - so I would've expected it to pick up the ADSL2 modulation...but it hadn't. Manually forcing it to 2 or 2+ works but with a very marginal snr margin of between 1.5 and 3.0 and a high uncorrected error count.
So, does the router not auto-negotiate with the DSLAM and get the "best" modulation going or am I not on 21CN/ADSL2 for some reason?
I seem to have a choice between G.DMT, syncing at 8Mpbs and a SNR margin of 5 but this only works a short time or, syncing at 10+ and geting a very marginal SNR of betwen 1.5 and 3.
Prior to21CN "migration" we were rock steady at 7Mbps sync and SNR margin of 6
Re: How can I tell if I am on ADSL2 or not...(and other problems!)
11-11-2012 10:44 AM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Re: How can I tell if I am on ADSL2 or not...(and other problems!)
11-11-2012 12:08 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Re: How can I tell if I am on ADSL2 or not...(and other problems!)
11-11-2012 12:24 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Re: How can I tell if I am on ADSL2 or not...(and other problems!)
11-11-2012 1:41 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Re: How can I tell if I am on ADSL2 or not...(and other problems!)
11-11-2012 1:56 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Many months ago I asked for our line to be ADSL2+ enabled and was assured several times that it had been done but the modem/router (TG585v8) always negotiates ADSL and never ADSL2 or 2+ (and yes it's got the latest PN firmware and is set to negotiate ADSL2+ ). Admittedly the line has a high downstream attenuation of 57.5dB but the error count and SNR margin variation is really low considering the line has been up for just under 4 months so am surprised that we don't see at least ADSL2 :-
mike=# select to_char(date,'YY/MM/DD HH24:MI:SS'),band_dn,band_up,snr_dn,recv_fec,recv_crc,recv_hec,frame_loss,signal_loss,errsecs from tg585v8 where (date > '11/11/12 13:40');
to_char | band_dn | band_up | snr_dn | recv_fec | recv_crc | recv_hec | frame_loss | signal_loss | errsecs
-------------------+---------+---------+--------+----------+----------+----------+------------+-------------+---------
12/11/11 13:40:01 | 2368 | 448 | 7.000 | 9024337 | 34726 | 181439 | 0 | 0 | 37
12/11/11 13:42:02 | 2368 | 448 | 7.000 | 9024359 | 34726 | 181439 | 0 | 0 | 37
12/11/11 13:44:01 | 2368 | 448 | 6.500 | 9024360 | 34726 | 181439 | 0 | 0 | 37
(3 rows)
mike=# select max(snr_dn),min(snr_dn) from tg585v8;
max | min
-------+-------
7.000 | 6.000
(1 row)
Re: How can I tell if I am on ADSL2 or not...(and other problems!)
11-11-2012 2:04 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Re: How can I tell if I am on ADSL2 or not...(and other problems!)
11-11-2012 2:14 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Quote from: Anotherone if you run the BT Diagnostic Speedtest, if it runs an Upstream test then you are on 21CN.
Has that changed as I'm sure I can remember the BT Speedtester in a previous incarnation performing an upstream test on 20CN? Could just be my memory playing tricks tho' !
Re: How can I tell if I am on ADSL2 or not...(and other problems!)
11-11-2012 11:08 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
jelv (a.k.a Spoon Whittler) Why I have left Plusnet (warning: long post!) Broadband: Andrews & Arnold Home::1 (FTTC 80/20) Line rental: Pulse 8 Home Line Rental (£14.40/month) Mobile: iD mobile (£4/month) |
Re: How can I tell if I am on ADSL2 or not...(and other problems!)
12-11-2012 7:17 AM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Re: How can I tell if I am on ADSL2 or not...(and other problems!)
12-11-2012 6:05 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Re: How can I tell if I am on ADSL2 or not...(and other problems!)
12-11-2012 6:46 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Re: How can I tell if I am on ADSL2 or not...(and other problems!)
12-11-2012 8:28 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Provisioned or not, it doesn't always give a benefit and can sometimes result in an unstable line. Your line seems to be just at that awkward length where ADSL2/2+ is not likely to give any improvement. Leaving that aside, your line seems to be underperforming.
Can you hear any crackling or other audible noises on the line when using the phone? Have you had any other problems with incoming or outgoing calls?
Do you have an NTE5a Master Socket and are you using Microfilters that look like this?
Do you have hard wired extension sockets? Is everything plugged in connected by filters? Are you using any plug in extension leads of any type, if so where?
Re: How can I tell if I am on ADSL2 or not...(and other problems!)
12-11-2012 10:06 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
To be honest the main reason I'd like ADSL2 is for an improved upstream bandwidth.
Re: How can I tell if I am on ADSL2 or not...(and other problems!)
13-11-2012 2:53 AM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
When you say that the stats do not differ when you remove the phone, the figure you need to be looking at is the Noise Margin. If the phone is having some effect the Noise Margin will increase when you've removed it.
You haven't confirmed that your filters are the "rat's tail" type similar to the link I posted.
You mentioned about poor quality extensions., I assume you've checked that they are all dead now you are plugged into the test socket. What colour wires and what terminal numbers are connected at the back of the front plate that you've taken off the NTE5a?
- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Bookmark
- Subscribe
- Printer Friendly Page
- Plusnet Community
- :
- Forum
- :
- Help with my Plusnet services
- :
- Broadband
- :
- How can I tell if I am on ADSL2 or not...(and othe...