Help,is this DLM? fluctuating Attenuation?

In march this year I migrated bb only from be, left landline with BT.

I was about to go for fibre with plusnet, but sky have me free landline for a year and my bb for £5 a month. So decided to go ahead. Now during speed checks it's always said still I'm on o2/be,, and I spoke to tech about this before I signed asking if I was still on the old o2/be, which he said yes, and over never had DLM on the line as bb migrators didn't. I said well that change is I put my line with you, he said no.

Anyway, on the 1st of Dec my line went active with sky, immediately I checked my speed, and WOW it was high, 12.7mb/1119mb.. The most I've ever had ever, and strangely my my attenuation had gone from 34db to 33.5db ,OK only half, but it lowered just connecting to sky's line.

Anyway the high sync speed is short lived and my line resynced about 1am tonight and it's gone to just 8mb/0.5mb and the DSL type changed to G.992.1? Is this normal, And my attenuation has dropped to 31db.

I'm still using the technicolor 582n router from be, should I plug the sky hub in if it is DLM?

Also now I do a speedtest it says my ISP is sky, so they have moved me when 2 tech told me I would stay on the old infrastructure. Which was the selling point for me..

Any help is be so grateful

Edited by deleted (Tue 02-Dec-14 02:42:01)

Just as I typed this out, my line disconnected and went back to this.

DSL Type: ITU-T G.992.5

Bandwidth (Up/Down) [kbps/kbps]: 1.023 / 12.544

Full stats below
Link Information

Uptime: 0 days, 0:20:58

DSL Type: ITU-T G.992.5

Bandwidth (Up/Down) [kbps/kbps]: 1.023 / 12.544

Data Transferred (Sent/Received) [GB/GB]: 2,33 / 1,86

Output Power (Up/Down) [dBm]: 12,1 / 19,6

Line Attenuation (Up/Down) [dB]: 16,8 / 33,5

SN Margin (Up/Down) [dB]: 13,9 / 5,8

System Vendor ID (Local/Remote): TMMB / ----

Chipset Vendor ID (Local/Remote): BDCM / BDCM

Loss of Framing (Local/Remote): 44 / 0

Loss of Signal (Local/Remote): 5 / 0

Loss of Power (Local/Remote): 0 / 0

Loss of Link (Remote): -

Error Seconds (Local/Remote): 283 / 28

FEC Errors (Up/Down): 2 / 181

CRC Errors (Up/Down): 0 / 58

HEC Errors (Up/Down): 159 / 0

Yes, this looks like Sky DLM. It really does test your line over the first few days and try to find the optimum connection speed/SNR margin. Generally it will resync at around 2am every night; once it stops doing this it's complete. In my experience it does a pretty good job, but the speed can fluctuate a lot during this time.

I also see my attenuation varying by 0.5dB from time to time. I don't think it's anything to worry about.

Edit: sorry, I missed the bit about the DSL type changing, and the attenuation change being to 31dB. I can't explain that.

Edited by ip75 (Tue 02-Dec-14 09:29:07)

Given most routers only have a resolution of 0.5dB in the display of the attenuation it is nothing to worry about

Thanks for the help. I read on sky forum that the drop in attenuation to the 31db is prob due to it changing me to ADSL-1 , is really odd that the DLM even tests this option.

Must checked my stats and it is still connected at the speed from last night.


EDIT**Line testing is not currently in progress on your telephone line.**- Odd?

Edited by deleted (Tue 02-Dec-14 12:31:56)

Thanks, do you think if would be worth plugging the sky router in during this DLM time,as I'm still using the old o2 Tg-582n?

In reply to a post by craggs:

EDIT**Line testing is not currently in progress on your telephone line.**- Odd?

My Sky is often out of date as far as the DLM line testing information goes.

Don't switch off, reboot or change your router during line testing.

Yeap with Sky their DLM is one where the less interference from the end-user the better.

Usually it starts at around 4 Mbps for ADSL2+ lines and works its way up, so you have done better than some people who panic on the first morning the service is live.

I don't think it works this way any more. I joined back in January and it started off fairly high (around 6.5Mbps) and never went below 5.5 during the DLM period. Ended up at around 6, which isn't too different to what I had with Eclipse before.

Only issue I can see is I installed an phone extension of the master with proper BT wire, and a proper BT box about 3yrs ago.it has the open reach fibre faceplate on it, from my master socket, I've not got fibre but an sfi engineer fitted it as I had a line fault.

Anyway I put a socket of that and put the faceplate on my detention. Now it is in line testing im concerned I should put the router into the main socket at least to get better results.. Though it's been connected with be on the extension with no issues for Yeats.

I not sure that what I did counts as moving the master socket?