Ned 24Mb ADSL2+ only doing 15.5Mb

ubersonic

ubersonic

ubersonic

Soldato
Joined
26 May 2009
Posts
22,184
I know "up to" is self explanatory but im wondering if this sounds off to anybody, when our village only had 2Mb we got the whole whack and the same when we had 8Mb but our exchange was upgraded to 24Mb yesterday and were only getting 15.5Mb, despite being about 500 feet from the exchange (as crow flies, think cables run ~1000 feet) so losing 30%+ of the speed over that distance doesn't seem right to me.

Oh yeah im with Talktalk >.> (never moved after C&W bought Bulldog DSL)
 
FrenchTart said:
Your post doesn't make much sense. When your village only had 24mbit you got the full whack? What do you mean by that?
Click to expand...

It says 2mbit not 24mbit.

--------------------

Line stats:

Connection Speed | 15281 kbps | 1017 kbps
Line Attenuation | 14.5 db | 5.6 db
Noise Margin | 14.9 db | 12.3 db

Its a Netgear DG834gt running latest firmware
 
ubersonic said:
It says 2mbit not 24mbit.

--------------------

Line stats:

Connection Speed | 15281 kbps | 1017 kbps
Line Attenuation | 14.5 db | 5.6 db
Noise Margin | 14.9 db | 12.3 db

Its a Netgear DG834gt running latest firmware
Click to expand...

Your noise margin is too high. Should be around 6dB. Try the test socket to make sure it's not causing noise.

Attenuation of 14.5dB and 6dB noise margin would/should give you pretty much top speed.

Also, you should use/try DGTeam firmware.
 
Swifty55 said:
Your noise margin is too high. Should be around 6dB. Try the test socket to make sure it's not causing noise.

Attenuation of 14.5dB and 6dB noise margin would/should give you pretty much top speed.

Also, you should use/try DGTeam firmware.
Click to expand...

K ill try plugging it straight into the master socket and see if that improves things.
 
ubersonic said:
It says 2mbit not 24mbit.

--------------------

Line stats:

Connection Speed | 15281 kbps | 1017 kbps
Line Attenuation | 14.5 db | 5.6 db
Noise Margin | 14.9 db | 12.3 db

Its a Netgear DG834gt running latest firmware
Click to expand...

You're right. I clearly suck at reading, sorry.
 
Swifty55 said:
Your noise margin is too high. Should be around 6dB. Try the test socket to make sure it's not causing noise.

Attenuation of 14.5dB and 6dB noise margin would/should give you pretty much top speed.

Also, you should use/try DGTeam firmware.
Click to expand...

Now I have:

Connection Speed | 17907 kbps | 1020 kbps
Line Attenuation | 14.0 db | 5.5 db
Noise Margin | 12.0 db | 12.5 db

Guess the wiring in between here and the exchange just sucks :(
 
Margin is still too high, but even then at 14.0dB line attenuation your line doesn't suck at all, there is something else not right here.
 
Well this is literally as pure as I can set up the router, its plugged straight into the main socket (well into a filter into the main socket). Ill bring home the DGN2000 from work and see if that makes any difference, actually ill try swapping the filtrer and the filter-router cable too.
 
ubersonic said:
Now I have:

Connection Speed | 17907 kbps | 1020 kbps
Line Attenuation | 14.0 db | 5.5 db
Noise Margin | 12.0 db | 12.5 db

Guess the wiring in between here and the exchange just sucks :(
Click to expand...

Is that the test socket or just the master?

original


The test socket is behind the front plate of the master socket.
 
You were only upgraded yesterday, just let it settle for a few days, the noise margin should go down on it own accord. Providing you dont keep disconnecting, I'd say see how it is in a few days to a weeks time.
 
Swifty55 said:
Do you have extensions installed?
Click to expand...

Basically the house has a phone socket on the wall next to the front door (near the ceiling) which Telecom installed in the early 80's iirc, this socket has no other sockets wired off form it, into this socket is plugged the microfilter, when I did the 17Mbit test the filter had just a 1m RJ11 cable connected straight into the router which was sat on a ladder.

Under normal circumstances the RJ11 cable would go into a twin RJ45 socket next to the aforementioned BT socket which is wired via Cat5e to another twin socket in the converted attic then another RJ11 cable runs from that to the router.

Seing how we are losing 2.6Mbit just so my dad can have the router on his desk (he likes to see the lights) im considering just mounting it onto the wall by the main phone socket lol.



V_R said:
You were only upgraded yesterday, just let it settle for a few days, the noise margin should go down on it own accord. Providing you dont keep disconnecting, I'd say see how it is in a few days to a weeks time.
Click to expand...

Good point, tbh im not that fussed if I cannot improve it as even at 24Mbit it would only be 3x as fast as 8Mbit, I haven't really noticed a difference going from 8Mbit to 15Mbit apart form a few big downloads as its hardly the quadruple speed increase that 2Mbit to 8Mbit was and certainly nothing like 56Kbit to 2Mbit.
 
The 0.5 dB difference between original setup and test socket suggests there's no real problem with your wiring so I'd leave it as it was and wait a few days.

A high Noise Margin could be down to your ISP running different tests on your line to establish the best possible speed. Replugging it may just have caused a different test speed. I'm not wholly sure what ISP do and check for when they run line tests but most ISPs will probably check for errors and stuff as they adjust the speed. Most lines will go down to around 6-7dB Noise Margin and judging by the shift from 15 something to 17 something and a drop of 3dB on the margin you should go up to 20 Mbit at least, provided Talk Talk don't try and limit your sync.
 
SNR is too high, possibly because its adjusted the profile to help stablise your connection which could have been dropping, pro's of higher SNR is that is can help a connection thats dropping, downside is it will bring your speed down to help stablise the connection.

1) Find out if your connection was dropping
2) If it was, diagnose and try and fix this issue
3) Get your ISP to reset your SNR profile to a standard 6db profile and monitor for drops
4) If it stays stable on 6db, ask your ISP if they have the ability to put it on a FastPath 3db profile, your connection "may" hold this fine, giving you better speed, and not drop, if it does, excellent
5) If it stays stable on 3db, use the DGTeam firmware on the netgear to further tweak your SNR margin.

6) Remove the bell wire from the BT master socket, this seen me go from 13.5mb/s to 17mb/s at home.

If however the above don't work, and your line still drops its connection, your SNR will just go up again.
 
Today the power company turned our street on/off while doing work and afterwards: Ka-Pow!

Connection Speed | 19852 kbps | 1020 kbps
Line Attenuation | 14.0 db | 5.6 db
Noise Margin | 8.4 db | 11.5 db

This is better but is it good? assuming my home wiring is still losing 2.6Mbit thats 22.45Mbit at the main socket, which sounds good.

Im happy with ~20Mbit though :)
 
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