How do I check broadband profile

grumpycrab

Hi - will be debugging a neighbour's broadband. They appear to be stuck on a 2MB profile(not sure if that term is correct). They use a TP LINK ADSLrouter/modem. (I get 7MB next door on an upto8 package).

They're on some ancient BT package (option 3?).

Will the modem stats tell me anything useful? Thanks.

debitcardmayhem

Look here http://www.kitz.co.uk/adsl/max_speed_calc.php
and kitz has other help on their site

grumpycrab

Thanks. I may be back :-)

kwikbreaks

The official BT speedtester used to tell you what the profile was set to...

http://speedtester.bt.com/

It probably still does but I can't test it as I'm on cable now.

grumpycrab

kwikbreaks wrote: »

The official BT speedtester used to tell you what the profile was set to...

http://speedtester.bt.com/

It probably still does but I can't test it as I'm on cable now.

Interesting. "IP Profile for your line is - 7.15 Mbps"
So that's me good. Now to see what the neighbour's is set to.

kwikbreaks

In case you didn't know that's the maximum for ADSL on BT infrastructure. Can't you get ADSL2+ from anybody?

If you are left puzzled in any way post up their router stats. Look especially at the upstream - it s/b 448 for RADSL the old fixed speed profiles were 256 up iirc. If they sync ~ 2Mbps with a big noise margin (double figure dB at least) they may have been put on a fixed 2Mbps profile as you suspected - the question is why and the bigger one is how to get past first line ISP support to get it fixed.

grumpycrab

Here are the modem stats (TD-W8951ND)
Line is rated by bt as "upto 5.5Mb"

We're on 20CN I assume. Profile looks like its 2? (88% X 2272 ?)

Downstream / Upstream

SNR Margin

:

6.0 13.0db

Line Attenuation

:

49.5 31.5 db

Data Rate

:

2272 288 kbps

Max Rate

:

4064 804 kbps

CRC

:

462 5

kwikbreaks

Yep that looks like a fixed 2Mbps profile - I remember the 2272/288 now I've been prompted by that.

As you are getting max sync so must be low 30's at most the real question is why his line is showing such high attenuation - something doesn't stack up at all.

grumpycrab

^ thanks for the speedy reply; there are 2 lines coming into the house (if that explains attenuation?); how do I phrase a question to bt?
EDIT: rather than speak to bt on the phone is there a good bt forum?

kwikbreaks

Yes there's a BT community forum - http://community.bt.com/

The number of lines is pretty much irrelevant as the second one will just use a spare pair in the existing cabling to the house.

Attenuation is a measure of how much power is lost between the exchange and the house - it is mostly just down to how long the line is.

You should take your own router stats and those of your neighbour and post both up. They'll likely do nothing to help as there is no guarantee for ADSL performance. It could be some sort of fault or it could be that the line routing back to the exchange is actually different and is longer.

It could also be that the router is reporting it incorrectly but that would be very unusual - you could try it using your own router for comparision - there s/b no need for a valid login as the connection is done at a physical level and established before any account validation.

grumpycrab

Thanks kwikbreaks - I've had better success with forums for fixing some faults. Got through to BT; they couldn't even tell me what the IP PROFILE was of my neigbours (I get an error when I run the BTspeed/diagnostics too).

Anyway, raised with LEVEL2 support (if that means anything). My (good)stats to compare with theirs (couple of posts above) are (note up/down columns swapped)

Maximum Bandwidth (Up/Down) [kbps/kbps]:1,292 / 8,128

Bandwidth (Up/Down) [kbps/kbps]:448 / 8,128

Data Transferred (Sent/Received) [kB/GB]:0.00 / 1.25

Output Power (Up/Down) [dBm]:11.0 / 19.5

Line Attenuation (Up/Down) [dB]:14.0 / 27.0

SN Margin (Up/Down) [dB]:31.0 / 9.5

Vendor ID (Local/Remote):TMMB / IFTN

Loss of Framing (Local/Remote):0 / 0
Loss of Signal (Local/Remote):196,609 / 0
Loss of Power (Local/Remote):0 / 0
Loss of Link (Remote):0

Error Seconds (Local/Remote):196,609 / 0
FEC Errors (Up/Down):0 / 0
CRC Errors (Up/Down):7 / 51
HEC Errors (Up/Down):0 / 8