Profiles/Speeds

Tacitus · Aug 03, 2008, 15:22:11

Just looked at the results of a speedtest:

Your DSL connection rate: 3936 kbps(DOWN-STREAM), 448 kbps(UP-STREAM)

IP profile for your line is - 3000 kbps

Actual IP throughput achieved during the test was - 2798 kbps

Annoying BT don't do an intermediate 3500 profile but there we are. However, is there any 'good/bad' relationship between profile and IP throughput, or should the throughput simply be as near as possible to the profile?

This particular one doesn't look bad for a Sunday afternoon.

Rik · Aug 03, 2008, 15:36:02

They do do a 3500 profile, Tac, but you'd need a higher sync to achieve it, 64k more to be exact.

Tacitus · Aug 03, 2008, 15:57:09

Quote from: Rik on Aug 03, 2008, 15:36:02
They do do a 3500 profile, Tac, but you'd need a higher sync to achieve it, 64k more to be exact.

Irritating isn't it

I might take a look at the internal wiring and see if I can tweak a little bit more. Since I've already gone the faceplate and cat5 route, it seems unlikely. Does the speed look good for the given profile? I think it does, but I'm not an expert on the subtleties of profiles and download speeds

Rik · Aug 03, 2008, 15:59:31

The line's going as fast as it can for the profile, but BT's crude profiling is really hitting you hard. They really should be forced to use 250k increments rather than 500k.

Tacitus · Aug 03, 2008, 16:09:24

Quote from: Rik on Aug 03, 2008, 15:59:31
The line's going as fast as it can for the profile, but BT's crude profiling is really hitting you hard. They really should be forced to use 250k increments rather than 500k.

Actually it's not my line, it's sisters iDNet connection so I imagined the throughput is good. I doubt I can get much more out of the wiring though.

TBH I can't see why they can't use 250k increments all the way to 7000. Certainly they should do it below (say) 4/5000.

Rik · Aug 03, 2008, 16:12:06

The only place they currently do it is below 2Mbps, but the impact of a 32k loss in sync speed dropping a profile by 500k is plainly ridiculous, and should be addressed. Unfortunately...

Sebby · Aug 03, 2008, 16:56:16

Quote from: Tacitus on Aug 03, 2008, 15:57:09
Irritating isn't it I might take a look at the internal wiring and see if I can tweak a little bit more. Since I've already gone the faceplate and cat5 route, it seems unlikely. Does the speed look good for the given profile? I think it does, but I'm not an expert on the subtleties of profiles and download speeds

Unfortunately, internal wiring won't be having any impact if you're already using a filtered faceplate.

Like you suggest, the profile system is plain ridiculous, and needs a major overhaul.

Tacitus · Aug 03, 2008, 19:24:10

Quote from: Sebby on Aug 03, 2008, 16:56:16
Unfortunately, internal wiring won't be having any impact if you're already using a filtered faceplate.

Unfortunately part of the wiring runs outside the bungalow. It is external grade phone wiring but quite old, so I thought if that section was redone using external grade cat5 it might make a smidgen of difference. Possible, but maybe not worth the bother as everything seems pretty stable.

Leave well alone might be the operative words

Sebby · Aug 03, 2008, 20:03:58

If you're using a filtered faceplate, the ADSL is terminated as the line enters the property, so any extension wiring - however bad - won't have an impact.

Lance · Aug 03, 2008, 20:16:24

Quote from: Tacitus on Aug 03, 2008, 19:24:10
Unfortunately part of the wiring runs outside the bungalow. It is external grade phone wiring but quite old, so I thought if that section was redone using external grade cat5 it might make a smidgen of difference. Possible, but maybe not worth the bother as everything seems pretty stable.

Leave well alone might be the operative words

Bear in mind that it may actually be BT's wiring and therefore illegal for you to change. Whether tthey would notice though...