Max DSL query.

Around lunchtime my router told me that my Data rate was 6752 kbps down and
448 kbps up, and that my latency was fast. Just switched router on and
it's now saying 5888 down, 448 up and latency is *INTERLEAVED*. Why is

pmj...

Do you mean...
"why is that?" ?
or...
"*What* is that?" ?

& are you asking about the "Interleaved" Latency bit?

Or the Data Rate now being shown as 5888 kbps (Down)?
As opposed to the previous figure of 6752 kbps?

Flyiñg Ñuñ 2°°6 +...

The latency bit changing from *Fast* to *Interleaved*

pmj...

OK...
& now, can you please say whether your Q is asking *Why* it
(the Latency) is changing/has changed to being "Interleaved"?

Or whether the Q is asking *what* Latency actually is & what
the different kinds are, (such as Interleaved or Non-Interleaved)?

Flyiñg Ñuñ 2°°6 +...

I think that's *yes* and *yes*. :)

Flying Rat...

Interleaving is a form of error correction applied when your line is=20

mothy...

=20

mothy...

ow=20

mothy...

with=20

mothy...

=20

mothy...

ays?

I suppose it's possible, I started off synchronising at 3400 kbps or=20
thereabouts. To be honest though I saw a dramatic change once I started=20
using a router, but it still took time to settle and increase, about=20
three days in all. I did eventually get sync speeds over 8000 kbps and=20
then that dropped to 6800 kbps and below but never below 5200 kbps. When =

MCC...

Like mothy, my connection, up until about the 10th of June, was flying at
between 5 and 6 Mbps down and 370+ up. However since 10th June, my speed
has dropped for no obvious reason to 3.5 Mbps sometimes and more likely to
be 2.5 Mbps. Most confusing. However, as I don't do a lot of mega
downloading I'm happier if the connection is reliable, and mine always
seems to be, says he with everything of which he has two, crossed :-))
Speed, like size, isn't everything. It's what you do with it that matters

Flyiñg Ñuñ 2°°6 +...

Have you checked the Latency set up in your router. My speeds were quite

pmj...

fast until latency was changed to *INTERLEAVED* , presumably by BT. In
fact the speeds have just about halved so I'm now back to just under 2000
kbps which is back to where it was before Maxdsl was involved.

MCC...

Have given up using the router for the time being because it keeps dropping
the connection, as does my Zoom modem. However my Binatone modem just keeps
on going, with never a hiccup.

Flyiñg Ñuñ 2°°6 +...

I need my router for the netw*rk, but I might give my ADSL modem a try and
see what happens with that. I won't be able to check latency and

pmj...

Oh?
Why not?

Flyiñg Ñuñ 2°°6 +...

'cos I don't think there's a facility on the modem to check that - unlike
with the router.

An ordinary USB ADSL Modem should still have some Diagnostic & Info
Software that comes with it, which is normally Installed when you
Install the Drivers for the Modem.

They *usually* (though not always) put an Icon in The SysTray,
to Open up the Diagnostics/Info Utility.

If there isn't an Icon in the Systray, just have a look in the Start
Menu & see if there's a Shortcut to it.

Or look in the Program Files Folder, for the Modem's Files & have
a look & see if there are any Diagnostic/Info Utilities in there.

& also look at the Help Files & Manual or User Guide for it.

Flyiñg Ñuñ 2°°6 +...

Yes there is such a thing, but when you open it up all there appears to be
*Bytes Sent*, *Bytes Received* and two items *Rx* and *Tx* and a reset
button

sychronization, but it may give different speeds. That may give me an
inkling of what to do next.

Flyiñg Ñuñ 2°°6 +...

Just given it a go. Says it's connected at 4.5 Mbps but measured speed
still around 1.9 Mbps. So not much change there then :(

MCC...

What does this page tell you?

Flyiñg Ñuñ 2°°6 +...

It tells me 2500 Kbps but it was 8000 Kbps a few days ago.
I think that their changing the latency settings amended to Interleaving has
b*gg$red it. :(
I believe with some ISPs you can opt to have the Interleaving removed.

Flyiñg Ñuñ 2°°6 +...

Plusnet can set Interleaving to ON or OFF, so I'll see how it goes for a
few more days then have it turned off if there has been no improvement in
that time.

https://portal.plus.net/my.html?action=stable_rate

I got a sync speed I didn't like I just rebooted until I got one I did=20
like. I've had my current synchronisation speed for just over 4 days now =

so you see I'm not out of the woods just yet.

Another issue is I haven't seen the errors you report in fact losses are =

very low.

I'm less than a kilometre from my exchange as the crow flies but the=20
cable takes a few twists and turns to get here, and passes through a=20
couple of junctions plus the one outside my house, so I wouldn't know=20
what the cable length is at all or what the effect of those junctions=20
will have. BT seem to be always fiddling with them.

I do know it is rather fragile as it tends to break on average once per=20
year.

I recall saying I would be happy with 5500 kbps, which is what PlusNet=20
reckon is the average that is achieved. Well I'm not quite there yet but =

it does look as if it should be achievable based on the evidence so far.

mothy...

ieve=20

mothy...

=20

Flying Rat...

nce=20

unstable. It gets applied when your synchonisation speed is at the very=20

mothy...

I tried that link and it told me I would only get 2500 kbps but I was=20
achieving greater than that only few days later.

My connection is also set to interleaved and unless you're gaming, where =

milliseconds can make a difference with the game synchronisation, it=20
really shouldn't be noticeable. Mine was set because I couldn't maintain =

synchronisation with my USB modem and once set that became more stable.=20
You can put a request to PlusNet to have it removed, interleaving that is=
=2E

It took more than the ten days for my connection to become steady but=20
the actual download speed only became noticeably increased in the last=20
few days. I still think mine isn't set correctly.

I see PlusNet are halting the automatic free upgrades for at least two=20
months to try and catch up with all the queries that have generated=20
through those currently upgraded. You can request an upgrade still=20
though. I thought I'd let the dust settle before shouting up so that I=20
could get their undivided attention.

Flyiñg Ñuñ 2°°6 +...

So are you appeared to be in a similar position to me. Are you saying
there's a good chance my download speeds may increase in the next few days?

Flyiñg Ñuñ 2°°6 +...

Flyiñg Ñuñ 2°°6 +...

All digits crossed then. :)

Flyiñg Ñuñ 2°°6 +...

Here is the log of my download speed checks (Plusnet) I think they
connected me up to Maxdsl on the 8th or 9th an introduced the Latency
Interleaving around the 14th. So you can see what I'm on about from a
range of 3400 - 4500 kbps down to an almost constant 1900 kbps . I know
which I prefer, and I wasn't getting any problems like disconnections with
the higher range .

17-06-2006 12:31:54 1882.4
16-06-2006 16:12:38 1871.4
16-06-2006 16:12:15 1940.6
16-06-2006 16:11:51 1925.5
16-06-2006 14:02:16 1911.5
16-06-2006 13:59:03 1891.7
15-06-2006 10:11:06 2270.5
11-06-2006 22:27:18 1499.4
10-06-2006 16:20:35 3808.5
10-06-2006 10:28:16 4321.4
10-06-2006 10:27:58 4506.9
10-06-2006 10:27:37 3845.4
10-06-2006 10:26:52 3374.9
10-06-2006 10:25:12 4546.1
10-06-2006 01:44:21 3464.3
07-06-2006 11:49:01 1893.1
20-05-2006 13:40:34 1653.1
20-05-2006 13:38:25 1609.9
20-05-2006 13:37:53 848.5
20-05-2006 13:37:29 1183.8

Flying Rat...

that sort of explains how it works by slicing stuff up and making errors=20
smaller and more fixable.

However it shows that the ISPs can switch it off for you if it does=20
become a problem. I'd leave it to stabilise for now.

Because of that slicing, it might mean your stats show more errors.=20

mothy...

FN My readings on this are consistently above 2500 kbps up to 4800 kbps=20
but I'm finding the download rates on this tool always low. I suppose=20
that is the tool that PlusNet will judge the speed by. My router has=20
resynced even higher overnight and is now above 7500 kbps, but this=20
doesn't seem to mean a lot and the reported speed that PlusNet should=20
set is a good 2000 kbps above what I'm actually getting at its best.

I'll post a query with PlusNet to see why there is such a discrepancy=20
between the forecast and actual speed rates.

Flyiñg Ñuñ 2°°6 +...

Atm my router is synching at 4448 down and 448 up

Plusnet speed test gives me 1995.9 kbps
is giving 1952 kbps down and 341 kbps up

That's because large errors are now sliced into smaller parts from which=20

mothy...

Plusnet gives me 2700 kbps down

Speedtest gives 4850 kbps down and 372 kbps up

Syncing at 7568 kbps down and 448 up

Steve...

I'm on the Tiscali MaxDSL trial 1.14KM from exchange (straight line)
syncing at 8128 down and 832 up rock solid SNR 12.6 Attenuation 34
through a Modem/Router

Getting:
Download Speed: 6184 kbps (773 KB/sec transfer rate)
Upload Speed: 692 kbps (86.5 KB/sec transfer rate)

Real world speed on a 100MB file is 747KB/sec

Flyiñg Ñuñ 2°°6 +...

Looks like Plusnet will have to pull their finger out then. :(

Flyiñg Ñuñ 2°°6 +...

Seems like there must be some collusion between the two of them in my case
then. They've always seemed to give similar values for me.

MCC...

I read on another group that some improvement in speed had been gained by
bypassing the anti-surge protection for the phone line. I certainly use an
anti-surge adaptor for both my power supplies and the phone line but I
don't think I am brave enough to by-pass it just to gain a few extra bps -
at least not on a permanent basis.
Having said that, I'm not so naive as to believe that this anti-surge
protector will save me and my router/modem from a lightning strike ;-)

Flyiñg Ñuñ 2°°6 +...

Thanks Mike - I'm sure that would be a great help. :)

recovery is quicker and more effective. But no matter its size, an error=20
is an error. That's one reason those numbers jumped.

limit of what your line will support.

What has happened is the software at BT has detected errors at the=20
faster speed. It has compensated by setting a lower line synchronising=20
speed and applying interleaving to ensure your data is as correct as=20
possible.

Flyiñg Ñuñ 2°°6 +...

Well the dasta rate has now gone down to 3236kbps and the router is finding
around 3300 CRC errors each second on downstream with 448kbps and around 40
CRC errors up - whatever all that means. Actual download speed has dropped
from above 4000kbbps to around 1800kbps - not as good as before they
converted me to Max DSL. :(

Latency is the delay between asking for data and it arriving back,=20
applying interleaving increases that delay/latency. Gamers in particular=20
don't like it and can opt for fast pathing instead. Most people won't=20
particularly notice it.

Interleaving is also referred to as Forward Error Correction, in that=20
it's a system which sorts out bad data packets before they reach your=20
system.=20

It's actually much more complicated but that's basically what=20
interleaving is, a system that makes MAX more stable and gives you the=20
best possible speed.

Flyiñg Ñuñ 2°°6 +...

Sounds fine Ratty except that since it went to Interleaved I've noticed a

Flyiñg Ñuñ 2°°6 +...

Well it's been on for 2 hours 10 minutes now - although the pooter was
hibernating. I'm monitoring the ADSL Staus page and in the downstream colum
there's listed:

Errored Seconds 256
Loss of signal 1
Loss of Frame 0
CRC Errors 7
Data Rate 3872 kbps

Upstream:
Errored Seconds 3
Loss of signal 1
Loss of Frame 0
CRC Errors 0
Data Rate 448 kbps

Is that good or bad ? Downstrem Data Rate seems low to me and measured
download speed is 2373.5 Kbps

Incidentally whilst typing this Errored seconds has risen to 257 and CRC
Errors to 8 (downstream)

distinct progressive fall in actual measured download speed. If it
continues for a few more days this way, it'll be faster on my emergency
56kbps dial up. That's giving me about 48kbps these days.

Rabbit...

Don't forget Plusnet says it takes 10 to 14 days for your router to train,
so it will go up and down till it finds it's stable rate. Mind you mine
hasn't found it in a month, it's still liable to a crawl now and again but
rebooting the router usually gets a better speed.

Flyiñg Ñuñ 2°°6 +...

Currently download speed is 2559.6 Kbps
I shall now reboot my router and try it again.
And now it's 2140.6 Kbps :(

that?