O2 Broadband help This is a discussion on, Should i be getting more? within the O2 Broadband help and support forum; much better speed? Link Power State: L0 Mode: ADSL2 Channel: Fast Trellis: U:ON /D:ON Line Status: No Defect Training Status: ...

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  #1  
Old 30-01-09, 11:40 PM
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Should i be getting more?

much better speed?

Link Power State: L0
Mode: ADSL2
Channel: Fast
Trellis: U:ON /D:ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 6.0 7.1
Attn(dB): 40.5 25.6
Pwr(dBm): 18.9 12.4
Max(Kbps): 6494 1226
Rate (Kbps): 5680 1204
G.dmt framing
K: 79(0) 35
R: 12 0
S: 1 1
D: 64 1
ADSL2 framing
MSGc: 61 16
B: 78 34
M: 1 1
T: 2 3
R: 12 0
S: 0.4783 0.9964
L: 1522 281
D: 64 1
Counters
SF: 2376918 2380438
SFErr: 55 15666
RS: 318507020 0
RSCorr: 69251 0
RSUnCorr: 1133 0

HEC: 44 14465
OCD: 0 0
LCD: 0 0
Total Cells: 510225242 3924890654
Data Cells: 22644723 1106644253
Drop Cells: 0
Bit Errors: 0 1035485

ES: 34 10249
SES: 0 42
UAS: 37 626200
AS: 38087

INP: 2.01 0.00
PER: 16.02 16.44
delay: 7.65 0.24
OR: 33.45 10.70

Bitswap: 3296 233

Total time = 10 hours 35 min 36 sec
SF = 2376918
CRC = 55
LOS = 0
LOF = 0
ES = 34
Latest 1 day time = 10 hours 35 min 36 sec
SF = 2376918
CRC = 55
LOS = 0
LOF = 0
ES = 34
Latest 15 minutes time = 5 min 36 sec
SF = 21032
CRC = 0
LOS = 0
LOF = 0
ES = 0
Previous 15 minutes time = 15 min 0 sec
SF = 56148
CRC = 2
LOS = 0
LOF = 0
ES = 1
Previous 1 day time = 0 sec
SF = 0
CRC = 0
LOS = 0
LOF = 0
ES = 0
15 minutes interval [-30 min to -15 min] time = 15 min 0 sec
SF = 56148
CRC = 5
LOS = 0
LOF = 0
ES = 1
15 minutes interval [-45 min to -30 min] time = 15 min 0 sec
SF = 56210
CRC = 0
LOS = 0
LOF = 0
ES = 0
15 minutes interval [-60 min to -45 min] time = 15 min 0 sec
SF = 56148
CRC = 0
LOS = 0
LOF = 0
ES = 0
Showtime Drop Reason: 8000
Last Retrain Reason: 8000

Last edited by r3p; 31-01-09 at 01:25 AM..
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  #2  
Old 31-01-09, 11:47 AM
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Re: Should i be getting more?

Your sync is low for your attenuation, your noise margin is at the default level, so you probably have a problem with a noisy line i.e. if that's the case it is nothing to do with O2 and there's nothing they could do directly to improve things for you.

To determine whether the noise is arising in your home wiring or in the BT line you need to do a comparison connection using the test socket which is hidden inside your master socket (assuming it isn't an old style master). Post the results.

If you're able to fix the noise issue then your attenuation should support ~11meg.


Edit:

Hmm. I notice also that you are syncing at ADSL2 not ADSL2+, which is odd and it could be that line noise isn't the issue (or not the only issue).

What firmware are you running and have you inadvertently set the wrong ADSL mode? If so, select ADSL2+ and see if that helps at all. What sync do you get using the O2 Wireless Box?

Last edited by Saturday; 31-01-09 at 11:57 AM..
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  #3  
Old 31-01-09, 11:18 PM
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Re: Should i be getting more?

hi mate

i will try all the settings and will post when im back home 2moro.

im using the old v1 sky router and i followed the method of re flashing the router to default then updated it to the latest one on the netgear site

so i am not sure how i may have set adsl2 if you can explain how i could set it to adsl2+ i will test it as soon as im home. with both routers

thanks

Last edited by Saturday; 01-02-09 at 08:46 AM.. Reason: Removed full quote of preceding post
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Old 01-02-09, 09:03 AM
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Re: Should i be getting more?

The standard Netgear firmware doesn't allow you to change ADSL mode. It defaults to "multimode" i.e. it allows the exchange equipment to determine the mode to use. Modified firmwares such as DGteam will allow you to change mode so my earlier comments were in case you had used something like this.

The question therefore is why are you connecting with ADSL2 rather than ADSL2+?

There are basically three possible reasons:
  • O2 have set your connection incorrectly/there's an exchange equipment fault;
  • your router is playing up;
  • the nature of your line noise is such that the exchange equipment and the router have determined that the best mode to use is ADSL2.
I think the last is far more likely than the first two.

The comparison tests I recommended earlier may give further clues. Of particular interest will be if the O2 Box syncs at a significantly higher speed and if, using the Netgear, the test socket gives either a significantly higher sync or noise margin. If that proves to be the case then it would be interesting to see if the Netgear has been able to sync ADSL2+ with the test socket.
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  #5  
Old 02-02-09, 05:02 PM
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Re: Should i be getting more?

Hi

i did some testing in the test socket but it still comes up with similar stats

im using the o2 box atm and here are my current stats

Uptime: 0 days, 17:10:57
DSL Type: G.992.3 annex A
Bandwidth (Up/Down) [kbps/kbps]: 1,243 / 5,107
Data Transferred (Sent/Received) [kB/kB]: 0.00 / 0.00
Output Power (Up/Down) [dBm]: 12.0 / 18.5
Line Attenuation (Up/Down) [dB]: 24.0 / 40.0
SN Margin (Up/Down) [dB]: 6.0 / 6.5
Vendor ID (Local/Remote): TMMB / BDCM
Loss of Framing (Local/Remote): 0 / 0
Loss of Signal (Local/Remote): 5 / 0
Loss of Power (Local/Remote): 0 / 0
Loss of Link (Remote): 0
Error Seconds (Local/Remote): 5 / 0
FEC Errors (Up/Down): 686 / 37,889
CRC Errors (Up/Down): 686 / 370
HEC Errors (Up/Down): 16,930 / 346

is there any thing on there which could be hindering my speeds?
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Old 02-02-09, 05:21 PM
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Re: Should i be getting more?

The main problem is you have a noisy line. If your sync/noise margin is similar in your test socket with nothing else plugged in, then the noise is probably down to your BT line. Also, check that with the test socket in use, no hardwired extensions work. If they're not disconnected when the faceplate is off then there could be a mis-wiring.

The other issue, which may be of no consequence, but could be resulting from your line noise, is that you are connecting ADSL2 not ADSL2+, irrespective of the router used.

You could give O2 a call and ask them to experiment with G.DMT and ADSL2+ to see if either gives you a better sync (that's assuming your line condition will support ADSL2+) - G.DMT often gives a slightly better connection with a poor line..

Last edited by Saturday; 02-02-09 at 05:39 PM..
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Old 02-02-09, 07:26 PM
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Re: Should i be getting more?

Quote:
Originally Posted by Saturday View Post
The main problem is you have a noisy line. If your sync/noise margin is similar in your test socket with nothing else plugged in, then the noise is probably down to your BT line. Also, check that with the test socket in use, no hardwired extensions work. If they're not disconnected when the faceplate is off then there could be a mis-wiring.

The other issue, which may be of no consequence, but could be resulting from your line noise, is that you are connecting ADSL2 not ADSL2+, irrespective of the router used.

You could give O2 a call and ask them to experiment with G.DMT and ADSL2+ to see if either gives you a better sync (that's assuming your line condition will support ADSL2+) - G.DMT often gives a slightly better connection with a poor line..
i spoke to one of the o2 support person hes told me he hasnt heard of G.DMT and that he said i am on adsl2+ i told him the router was showing it up as adsl2 which he said is the same thing so im not too sure what i could say to him so then i proceded to tell him to do some line tests he said my lin is capable up2 9 meg but im not hitting 8 meg on the current package

but hes change the noise margin to 3 from 6db to try and make the speed increase

here is the current stats now:

Uptime: 0 days, 0:02:17
DSL Type: G.992.3 annex A
Bandwidth (Up/Down) [kbps/kbps]: 1,330 / 5,810
Data Transferred (Sent/Received) [kB/kB]: 0.00 / 0.00
Output Power (Up/Down) [dBm]: 12.0 / 18.0
Line Attenuation (Up/Down) [dB]: 24.0 / 40.5
SN Margin (Up/Down) [dB]: 4.0 / 3.5
Vendor ID (Local/Remote): TMMB / BDCM
Loss of Framing (Local/Remote): 0 / 0
Loss of Signal (Local/Remote): 0 / 0
Loss of Power (Local/Remote): 0 / 0
Loss of Link (Remote): 0
Error Seconds (Local/Remote): 0 / 0
FEC Errors (Up/Down): 0 / 28
CRC Errors (Up/Down): 0 / 0
HEC Errors (Up/Down): 0 / 0

Last edited by r3p; 02-02-09 at 07:47 PM..
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Old 02-02-09, 09:39 PM
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Re: Should i be getting more?

Oh dear - looks like you got an agent that needs better training.

G.DMT is also known as G.992.1, ADSL, or less accurately ADSL1.

ADSL2 (G.992.3) is not the same as ADSL2+ (G.992.5).

With a noisy line, lowering the noise margin to increase your sync is just plain stupid. I'd be surprised if that doesn't give you connection problems.

If I were you I'd call again and get through to an agent who has a better appreciation of the issues. Get back on a 6db profile and maybe a different ADSL mode if that helps things.

BUT, changing ADSL mode is likely to give only a little or possibly no improvement. The key issue you have is line noise. That's not something that O2 can help you with.

Last edited by Saturday; 02-02-09 at 09:41 PM..
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Old 03-02-09, 10:08 AM
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Re: Should i be getting more?

when you use a corded phone do you hear pops and crackles? If so you could get BT to investigate but at no time ever mention broadband just say that the voice connection is bad.
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Old 03-02-09, 09:52 PM
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Re: Should i be getting more?

Quote:
Originally Posted by Undecided adrian View Post
when you use a corded phone do you hear pops and crackles? If so you could get BT to investigate but at no time ever mention broadband just say that the voice connection is bad.
i will get on to that but what if they ask for charges?:P
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