Hi,
When it comes to DSL technology, we all need to remember that DSL is distance/ Copper quality limited... Now you've quoted that your 1.5Ks from the exchange BUT is that strait line distance or PSTN route distance? Just because your house is only 1.5ks from the exchange, doesnt mean your PSTN Takes the same route...
Also, if you have copper thats been in the ground 70 years for your phone line, this is going to worsen service than if you had 2 year old copper.
I lived 450 Metres from our local exchange, but could only get 512k DSL as the physical line length was 4.5Ks on 27 year old copper...
I am in a similar situation with regards to the 8Mb speed which I was sold the package on.
After being assured my line would support 7Mb, the best it has been is 1-2Mb.
I have contacted Customer Services and Technical Support without any joy......
I am only 1.5Kms from the exchange and my computer is literally right next to where the line enters the house.
Its a wired connection......Ethernet via a D-Link DSL-300t .....to a Dual MAC G4.
Can anybody tell me where I should start with Wanadoo to gain a positive response and keep the aggrevation to a minimum.
Lastly...Here is to Kevin.....for setting up this site and making things better for all.
Many Thanks
IcenHI mate belive it or not I have had no broadband for over 2 months.
I have contacted Customer Services and Technical Support throughout this time. Nothing has really changed I am on a 5 meg connection that keeps cutting out. Something very stranged happened today. A BT engineer tured up at my door. I had no idea who had sent him and what he was suppose to do. And do you no the worst thing about it neither did he. He was told to come to my address to sort out a problem. He had no idea who had sent the call out all he had was my home number. If i had not been in he nad no contact number. I told him maybe Wanadoo had sent him because BT engineers dont visit people for free. And i have read about engineers being sent out by Wanadoo on this site. Anyway i told him my problem with Wanadooo. He tested the line with his laptop. and concluded my line could only handle 1.8 meg. Even through my exchange is only down the road. So after two months of heartache im gona go back to how i started. What a waste.
Hmmm....
Ive just had a BT line installed, and I am LESS than 1k from the exchange. But I can even get 256K DSL, as my line length is close to 8Ks...
I spoke too soon
Looking at a signal loss of 20Db for 2mbits DSL, 40DB For 1Mbits DSL, And as far as im aware, BT have removed limits for 512k - If they can provide it they will, but wont garuntee it over 5.5Ks from the exchange.
I don't understand the full significance of these figures but I understand they are to do with the noise on the line which affects the speed of the connection.
Those figures will be wrong. It's not a problem with your line though, it's your modem GUI. IOW your modem is probably calculating the figures correctly but displaying them incorrectly. Only in very exceptional circumstances is DS attenuation less than US attenuation. Try the UK firmware. www.d-link.co.uk recommends ver. 1.00b02t02uk.
Whish I could change my ISP, I live next door to my exchange, had my phone line upgraded but still only getting 2meg and all Wanadoo tell me “all we can do is test my line”. Over 5 months I had my line tested 3 times to no avail. I told wanadoo, “As I’m getting such a bad service off them we should part company” wanadoo will not realest me from my 12 month contract and insist I pay the full booty for a second rate service!
If you’re think of coming over to wanadoo… I suggest you keep on walking!
Yes, the DSL-300T is a strange beast, you have to wind it up with a key, I'm not fussed as I only pay for 512kb/s here in rural France, don't ask. And the thing just sits there behind a WRT54G; as I'm not an avid Peer2Peer junkie or Gamer, its adequate.
So, Icen I suggest you borrow somebody elses ADSL Modem and see what that reports. I must do the same.
Also, listed on the DSL-300T Modem status page is;
US Margin 31(mine)
DS Margin 31(mine)
By this it appears to indicate US and DS 'Noise Margin'
What that actually means, I'm not sure (and I'm a wireless comms Engineer). Guessing, perhaps its really a SNR (Signal to Noise Ratio) number in dB which is supplied by the modem chip, based on bit error measurements during the training 'synch.' sequence.
Once, you have some numbers you feel are reliable and repeatable, this little calculator predicts what you might expect re. speed. Interesting site.
So, Icen I suggest you borrow somebody elses ADSL Modem and see what that reports. I must do the same.
May not be necessary (see below).
Quote:
Also, listed on the DSL-300T Modem status page is;
US Margin 31(mine)
DS Margin 31(mine)
Probably also wrong. Many modems can only display 32 different values, i.e. 0 to 31.
Your values may well be higher. Plenty of margin since you're on a low speed.
Quote:
By this it appears to indicate US and DS 'Noise Margin' What that actually means, I'm not sure (and I'm a wireless comms Engineer). Guessing, perhaps its really a SNR (Signal to Noise Ratio) number in dB which is supplied by the modem chip, based on bit error measurements during the training 'synch.' sequence.
Exactly. The Noise Margin (aka SNR Margin) is the difference between the measured SNR and the minimum operating SNR. You'll probably understand all that better than I do since ADSL is essentially radio transmission over (lossy) copper wires. There's lots of stuff on the web about this.
Increasing the speed requires more 'use' of the noisier frequencies and therefore lowers SNR margin and increases sensitivity to noise. The modem will not synch if the Noise Margin is insufficient (~<6dB) and will 'de-synch' if the Margin approaches 0dB. It's usually DS which is critical since lower frequency US signals are less attenuated (and the average home is noisier than the average exchange ). Variable rate services will push the Margin as low as possible (~6dB).
This is why it's VERY IMPORTANT for everyone who is on, or going to be on, an 'up to 8Mbps' service to do all they can to reduce local noise.
Icen, If you're comfortable using Telnet, then the 300T has a CLI interface which may reveal the true Attenuation and Noise Margin values. See this page:
Sorry I migrated from freedom2surf - 2MB stable connection (before they started traffic shaping) to 1MB on wanadoo, despite being on the £27.99 service and having a Wanadoo LLU presence on my exchange
As I am not paying (it's a prize) I don't mind not being on LLU, but getting the old 2MB back would be nice. I am going to call Orange in the week, hoping their staff are bit more knowledgeable than wanadoo
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Many modems can only display 32 different values, i.e. 0 to 31.
