Getting the very most out of my connection (672 Kbps ADSL)

I've just moved to a new property and unfortunately the broadband performance is very very slow

BT have sent an engineer out but the upshot was that the line is as good as it's going to get and theres nothing that can be done beyond an infrastructure improvement (scheduled for the next couple of years so not a lost cause!). The engineer mentioned that interleaving is off and that the connection has no CRC errors (i.e. is very stable albeit slow).

Because of this I'm now trying to eek every last byte out of the connection that I possibly can.

Current Stats:
Link Rate - 672 Kbps (Down) / 416 Kbps (Up)
Line Attenuation - 63.5 dB (Down) / 31.5 dB (Up)
Noise Margin - 6.0 dB (Down) / 5.0 dB (Up)

Line:
I'm connected to this exchange - https://www.samknows.com/broadband/exchange/EASTM - which is an approximate 6.13KM (straight line) distance away.

Current hardware:
New BT master socket
ADSL Nation XTE2005 filtered faceplate (I also have a new Openreach MK3 faceplate I could use instead)
0.5m Tandy "ADSL Nation Pro+" twisted pair RJ11 cable
New Netgear modem router (think something like the Nighthawk).

My current modem doesn't support SNR adjustment (i've tried using telnet but it kills the connection no matter what).

I've just bought a Billion 8800NL based on the fact that it looks to be the best (or at least joint, with the same modem chip as the 7800NXL) modem I can buy, and that it supports SNR adjustment.

Is there *anything* else I can do?

Edited by deleted (Sat 11-Apr-15 09:49:55)

The line attenuation figures look the wrong way around since upstream attenuation is usually less than downstream due to the very different frequencies used.

At 6km straight line you might might be 8km of cable or 12 km so yes are probably the best you will get.

With 5dB noise margin on the downstream there is no much scope for noise margin adjustment.

D'oh, I completely messed the figures up - I've revised them in the first post.

I know that with such a long line it's going to be very difficult to get a large improvement - but even 5% would be a start.

Pushing down to a 3dB may be OK - the key will be whether the 6dB is stable, i.e. does it vary at all between day and night?

If you PM your postcode can see assess likely actual line length, since if its close to 8km chances of improving are probably higher, but if 12 km I'd not waste the time.

I would have suggested buying an unused 2wire 2700HGV from ebay.

Experience has shon them to be excellent on very long lines and they will train down to 3dB if the line is seen to be stable. They will also hold the line at 1 or2 dB which helps with overnight changes.

When I installed one on a friends 9++++ km line we managed to get the initial 900kbps downstream up to near 1.5Mbps.

In reply to a post by MHC:

I would have suggested buying an unused 2wire 2700HGV from ebay.

I've got one sitting in a cupboard if Jakg would like to PM me.

See my reply to MHC - I have a 2700HGV if you'd like it for the cost of postage.

Ok perfect - I've just picked one up on eBay for a fiver.

EDIT - Apologies - just seen the above posts! Thanks for the offer but I've just bought one.

Edited by deleted (Sat 11-Apr-15 19:07:41)

In reply to a post by Jakg:

EDIT - Apologies - just seen the above posts! Thanks for the offer but I've just bought one.

Back in the cupboard it goes then, not worth selling it for five quid less all the fees!

If you are not on BT and need to add a username and password for your connection.....use the PAGE=HURL13 method....http://bt2700hgv.tripod.com/063.htm

Ian