They Have upgraded me to 4Megs

[Soul Assassin]

MrSmith you switched your up and down speeds.

 

[RuneFire]

mine's also on 4mbit, but it's still limited to 108KB/sec... *bleh*

 

[Gambit]

Oh great Bwana please assist me in getting this calc to work as i enter 1024 and attenuation=45 & SNR=5 i get exactly what i put in = 1024 or if i put 3000 i get 3000 ??

I have been for awhile on 1mb and am less than 1.5km away however i must check this to be absolutely sure and getting disconnected frequently so maybe there is a way to reduce attenuation [i know not completely but a little helps]?

Thanks for your time & assistance and btw i was pushed with the upgrade after 2pm yesterday and atm on 2336kbps line speed but offcourse no ISP speed upgrade yet.

again thanks and look forward to any help.

Yuu

attenuation=45 & SNR=5 are very very bad figures. your line probably only supports max 1024. with an attenuation of 45, you are probably a lot further from your exchange than you think. More like 4 - 5 km (wire length and not "as the crow flies"). Also most people reckon you need a snr of at least 10 to have a stable line. But with an attenuation of 45 you should get at least 2megs or slightly more so there must be issues with your line to have such a low snr. Is your line hissing or crackling? maybe you should call telkom out to fix it.

edit:
Forgot to mention that the faster the line goes the more the snr drops so when you put in a speed of 3000 then you were actually inflating you snr ratio however with such a low snr of 5 that calc page is going to tell you whatever speed you are getting is the fastest your line is going to go.

 

[bwana]

. . please assist me in getting this calc to work as i enter 1024 and attenuation=45 & SNR=5 i get exactly what i put in = 1024 or if i put 3000 i get 3000 ??

I think thats because you've put in the numbers from after your "upgrade" to max level.

Do you have the old numbers from before the change?

 

[Scooby_Doo]

So this is what i got... Is it pretty good?


Downstream Margin: 21 db
Upstream Margin: 24 db

Downstream Line Attenuation: 34
Upstream Line Attenuation: 20

 

[Gambit]

So this is what i got... Is it pretty good?


Downstream Margin: 21 db
Upstream Margin: 24 db

Downstream Line Attenuation: 34
Upstream Line Attenuation: 20

Your line attenuation is slightly high but good. I can't say if your signal to noise ration is good because you havn't supplied your current sync speed. The higher your sync speed the more the SNR drops so if you were sync'ed at 4096 then its very very good.

 

[bwana]

@Gambit

My turn, my turn
4096 (Kbps.)

Noise Margin 12 dB
Attenuation 37 dB

 

[dualmeister]

Have you tested what your line should be capable of? http://212.23.23.177/calc.htm

Haha. I just did this calc and I got.

A crude estimate of what your line is capable of is 8192kbps

 

[bwana]

Haha. I just did this calc and I got.

Sweet - Whats your current sync speed?

 

[Inertia]

Syncing at 640kbps down and 384 up.

relative capacity occupation: 43%
noise margin downstream: 17.0 db
output power upstream: 4.0 dbm
attenuation downstream: 61.0 db

I'm not really sure what means what. What is my SNR? Are these good or bad values?

 

[bwana]

Syncing at 640kbps down and 384 up.

relative capacity occupation: 43%
noise margin downstream: 17.0 db
output power upstream: 4.0 dbm
attenuation downstream: 61.0 db

I'm not really sure what means what. What is my SNR? Are these good or bad values?

Your SNR is aka noise margin.

 

[Inertia]

Your SNR is aka noise margin.

Thought so

A crude estimate of what your line is capable of is 1202kbps (kilo bits per second)

Guess i won't be upgrading to 1 meg for 4 megs

 

[Gambit]

@Gambit

My turn, my turn
4096 (Kbps.)

Noise Margin 12 dB
Attenuation 37 dB

the attenuation is also slightly high but still good however the snr is almost at the safe limit of 10 db so you don't have much bandwidth left on your line. If you do the calc on http://212.23.23.177/calc.htm you will see it guestimates 5241 kb/s. You can sometimes improve your SNR (especially if you have multiple extensions in your house), there are guides on the net. Of coarse all these speeds and calculations fall flat when a better standard is used like adsl 2 and adsl2+. If telkom upgraded their dslams (most should be capable already) to one of these newer standards then you should see your potential line speed increase drastically.

 

[Gambit]

Syncing at 640kbps down and 384 up.

relative capacity occupation: 43%
noise margin downstream: 17.0 db
output power upstream: 4.0 dbm
attenuation downstream: 61.0 db

I'm not really sure what means what. What is my SNR? Are these good or bad values?

Your line attenuation is very high. There is nothing you can do about this other than moving closer to your exchange or hoping telkom setup a road side mini dslam near you. (good luck with that happening )

 

[dualmeister]

Sweet - Whats your current sync speed?

Downstream
Connection Speed = 4096 kbps
Line Attenuation = 24 db
Noise Margin = 19 db

Upstream
Connection Speed = 384 kbps
Line Attenuation = 6 db
Noise Margin = 18 db

Is this good ?

 

[Yuu]

I think thats because you've put in the numbers from after your "upgrade" to max level.

Do you have the old numbers from before the change?

Yes i do

Before sync increase
Attenuation=45
SNR or Noise Margin=7

note i tested the line speed from the link in the Main thread about TK upgrading so it was some time before they started yesterdays upgrades.

Yeah i think i will phone tk but only after the 1st as i am trying to finish some downloads and don't want them to cut me off.

Forgot to mention that the faster the line goes the more the snr drops so when you put in a speed of 3000 then you were actually inflating you snr ratio however with such a low snr of 5 that calc page is going to tell you whatever speed you are getting is the fastest your line is going to go.

It makes total sense

current stats on router

ADSL Link Downstream Upstream
Connection Speed 2368 kbps 384 kbps
Line Attenuation 45 db 13 db
Noise Margin 2 db 12 db

it does resync @ the lowest i seen 1600kbps

2 on the noise is the lowest i witnessed

thanks once again for helping guys.

Yuu

 

[Gambit]

Downstream
Connection Speed = 4096 kbps
Line Attenuation = 24 db
Noise Margin = 19 db

Upstream
Connection Speed = 384 kbps
Line Attenuation = 6 db
Noise Margin = 18 db

Is this good ?

Yeah, your line attenuation is very low and your noise margin at 4megs is high. Hence the calculation you posted earlier of showed the maximum speed that adsl 1 supports of 8megs.

 

[thedoc!]

A crude estimate of what your line is capable of is 8192kbps (kilo bits per second).



SNR Margin 28.3 12.0 dB
Line Attenuation 27.3 14.5 dB

Data Rate 4096 384 kbps
Latency FAST FAST

 

[bwana]

the attenuation is also slightly high but still good however the snr is almost at the safe limit of 10 db so you don't have much bandwidth left on your line. If you do the calc on http://212.23.23.177/calc.htm you will see it guestimates 5241 kb/s. You can sometimes improve your SNR (especially if you have multiple extensions in your house), there are guides on the net. Of coarse all these speeds and calculations fall flat when a better standard is used like adsl 2 and adsl2+. If telkom upgraded their dslams (most should be capable already) to one of these newer standards then you should see your potential line speed increase drastically.

The other day when I tested it they guestimated 6144 so its a bit of a crap shoot it seems

Not that I expected too much - when telkom installed they said I'm between 5-6km away from the dslam. They did say 6mb+ was theoretically possible at the time.

 

[mamacosjd]

Is this good or bad results:

SNR Margin: 27.7 downstream , 12.0 upstream
Line Attenuation: 30.6 downstream, 16.5 upstream
Data rate: 4096 down, 384 up

What you think?