In reply to a post by lockyatlrg:

BT always start off slow and plod along until their is a marketable reason to lift their artificially low limits. Which is a small part of the reason I avoid them like the plague.

It makes good business sense though doesn't it. When the price the average person is willing to spend is limited, you want more than one "product generation" out of the billions invested.

I would like to repeat the question about uncapping the modem.

If I could only download the config file i would easly edit it and upload back. I do agree that this is not a normal procedure but why not surf at higher speed if possible?

My Stats:
Attainable rate (kbit/s): 137796 Downstream
35433 Upstream

I am really close to the green cabinet, maybe 40 metres.

Is there any chance downloding the file via tftp server or ftp somehow?

the modem isn't capped

It must be...

Why does it show i can go 136MBit (OBVIOUSLY ONLY 100MB DUE TO MODEM ETHERNET SPEC) while only getting 76MBit ?

Because it's an 80Mbps service?

I uncaped my cable modem in 2004 via TFTP server.

When you log in to Huwaei after unlocking you can see in stats that it is 80MB service only because it is caped to 79999 Downstream and 20000 Upstream but attainable is 136000 Downstream and 33600 Upstream.

Every time you restart modem it boots with preconfigured file where you get firewall rules, routing and speed etc.

That`s how it works.

And I am sure there are plenty people already uncapping it but not sharing this info with others so BT does not start working on blocking it more and more...

In reply to a post by Anonymous:

I uncaped my cable modem in 2004 via TFTP server.

Cable modems work in that way, but VDSL modems (such as the Openreach Huawei) do not. They work in a very similar way to ADSL / ADSL2+.

The large box at the other end of the line sets the maximum possible and they then negotiate a speed given the length of the copper wires and the permitted noise levels.

The attainable speed shown is the theoretical speeds if there was 0db noise on the copper - but that is never the case.

For example my ADSL2+ modem shows I'm sync'd at 16.7meg but says attainable rate is 20.4meg - and there is no way I can get 20meg. On a 3db noise margin setting I can get 18meg but it disconnects about 20 times a day making it unusable.

Edited by jchamier (Thu 05-Jul-12 23:19:47)

That's how cable works but not how DSL works - the line profile is controlled by the dslam/msan in the cab or exchange.

My estimate was 76.6 Meg Down and 20 Meg Up. I do not understand why they did not show a 100 Meg option to me as I am saying I am 40 metres from cabinet and I get 76 Meg at SNR 22.8 dB out of 138024 attainable?
SNR even changed to 9 dB (where on 3 dB with O2 was stable for weeks) should give me at least 120 meg but will not because it is caped. Is there no safe way of uploding another uncaped config file ?

You've quoted the attainable rates to us from your modem. How about telling us the actual connection speeds?

In the GUI that's the Line Rate. Via telnet it's the "Path" line immediately below the attainable line.