DSL CONNECTION/IP PROFILE/THROUGHPUT - what are these?

bridgej · Jun 22, 2009, 20:07:35

I just did a BT Speed Test on my line and got the following:

Your DSL connection rate: 4171 kbps(DOWN-STREAM), 935 kbps(UP-STREAM)
IP profile for your line is - 3000 kbps
Actual IP throughput achieved during the test was - 2676 kbps

What do these all mean, I know the DSL connection one is never the same 2 days running when I turn on my router?

D-Dan · Jun 22, 2009, 20:29:59

DSL connection rate is the speed you are synced at. This determines a theoretical maximum that you will never acheive because your bRAS (see below) will limit it.

IP Profile is you bRAS profile - this is the absolute maximum you will acheive in real world performance. In reality - you will probably acheive about 80% of that.

Actual is the actual throughput that you you really got.

The bRAS is linked to sync speed, since bRAS increments in 512Kbs increments (at the higher end - at the low end increments are 64 Kbs and 128 Kbs) and your bRAS should reach a level as shown here: http://www.kitz.co.uk/adsl/IPprofile.htm#IP_and_bRAS_profiles according to your sync speed.

Steve

Edit: Isn't it nice to talk about Bras and it doesn't involve the anatomy of women

Sebby · Jun 22, 2009, 20:39:58

Steve's said it all really. Things look fine.

bridgej · Jun 22, 2009, 20:43:45

thanks for the info, I had no idea what it all meant

Sebby · Jun 22, 2009, 20:46:01

You might want to check out this if you're interested.

http://www.kitz.co.uk/adsl/index.htm

D-Dan · Jun 22, 2009, 20:56:51

As an aside - since your sync is towards the lower end for your IP Profile - you could be in with a chance of a table entry over at DSL Zone's speedtest tables which are built on % throughput compared with sync speed - if you want your connection to be glowing in lights - do a speedtest there ealy in the morning

http://www.dslzoneuk.net/speedtest.php

Steve

Lance · Jun 22, 2009, 22:56:31

If you're really interested you could post the stats from your router and we can advise whether we think you could gain any extra speed or stability from your line!

bridgej · Jun 23, 2009, 09:28:05

These are the router stats this morning on ADSL2+ ( I am about 2 miles from the exchange):

ADSL Link      Downstream    Upstream
Connection Speed    4171 kbps      936 kbps
Line Attenuation      49.5 db      29.3 db
Noise Margin      2.6 db      5.3 db

bridgej · Jun 23, 2009, 12:49:52

Quote from: bridgej on Jun 23, 2009, 09:28:05
These are the router stats this morning on ADSL2+ ( I am about 2 miles from the exchange):

ADSL Link      Downstream    Upstream
Connection Speed    4171 kbps      936 kbps
Line Attenuation      49.5 db      29.3 db
Noise Margin      2.6 db      5.3 db

Now at lunchtime, they are:
ADSL Link      Downstream    Upstream
Connection Speed      4135 kbps    880 kbps
Line Attenuation      50.5 db      29.3 db
Noise Margin      1.9 db      6.8 db

Sebby · Jun 23, 2009, 13:07:56

The sync is roughly right for that attentuation, perhaps slightly low, but only slightly. The downstream noise margin is poor though. Have you tried the test socket or removing ring wires?

Lance · Jun 23, 2009, 13:49:56

The other things the two set of results show is that there has been a re-sync