Topic: What is line profiling?

[Simon]

Oh wow!  Your profile has definitely shot up, but your throughput should be closer to it.  Over to Rik! 

[Rik]

Well, that profile is soon going to be replaced by a 3000kbps one, Clive.

A lift and shift is where the wiring for your ADSL connection is physically moved to a new port or card inside the exchange. It's supposed to eliminate the possibilities of hardware issues at the exchange end.

[Clive]

Thanks for the explanation.  I will continue to monitor the situation! 

[Rik]

Good luck.

[Simon]

Well, that profile is soon going to be replaced by a 3000kbps one, Clive.

So, why is it showing the higher profile now, Rik?  If it can reach 6500kbps once, why not all the time?

[Clive]

My speed is starting to collapse aready!   

Your DSL connection rate: 2944 kbps(DOWN-STREAM),  448 kbps(UP-STREAM)
    IP profile for your line is - 6500 kbps
    Actual IP throughput achieved during the test was - 2434 kbps

[Clive]

NOW look what they've done to me!

Your DSL connection rate: 2944 kbps(DOWN-STREAM),  448 kbps(UP-STREAM)
    IP profile for your line is - 2500 kbps
    Actual IP throughput achieved during the test was - 2333 kbps

 

[sam]

your screwed clive... by Christmas you should get out the old 56K modem.. it will be faster.

[Rik]

So, why is it showing the higher profile now, Rik?  If it can reach 6500kbps once, why not all the time?

The line has re-synced at a lower speed. It suggests noise vulnerability to me.

[Rik]

NOW look what they've done to me!

Your DSL connection rate: 2944 kbps(DOWN-STREAM),  448 kbps(UP-STREAM)
    IP profile for your line is - 2500 kbps
    Actual IP throughput achieved during the test was - 2333 kbps

 

Your line is unstable and the sync speed is dropping, Clive. Have you checked the downstream noise margin?

[Clive]

I will bare all Rik:     The rest of you should avert their eyes.   

Link Information
   
 
Uptime: 1 day, 1:01:01
 
Modulation: G.992.1 annex A
 
Bandwidth (Up/Down) [kbps/kbps]: 448 / 2,944
 
Data Transferred (Sent/Received) [MB/MB]: 13.05 / 114.31
 
Output Power (Up/Down) [dBm]: 11.5 / 18.5
 
Line Attenuation (Up/Down) [dB]: 25.0 / 41.0
 
SN Margin (Up/Down) [dB]: 24.0 / 17.0
 
Vendor ID (Local/Remote): TMMB / ALCB
 
Loss of Framing (Local/Remote): 0 / 0
 
Loss of Signal (Local/Remote): 235 / 0
 
Loss of Power (Local/Remote): 0 / 0
 
Loss of Link (Remote): 0
 
Error Seconds (Local/Remote): 690 / 0
 
FEC Errors (Up/Down): 0 / 1,128
 
CRC Errors (Up/Down): 0 / 14
 
HEC Errors (Up/Down): 0 / 11
 
Line Profile: Interleaved
 
 
 

[Rik]

It looks like your line has now got a 15db target noise, margin, Clive, which will knock 2000kbps off your speed. Interleaving is on, so that will reduce throughput a bit more. I can only conclude that the line is subject to severe noise bursts (the margin has risen since you last synced, so it was noisier at that time).

There's probably not a lot you'll get BT to do about it. With another ISP, you might stand more chance, but not necessarily a lot.

[Clive]

I'm now under 2 Meg so the good times are already over.   

[Rik]

I can't remember, Clive, sorry, have we done the router at test socket bit?

[Clive]

Yes, we did.  What exactly is interleaving?