What determines sync speed

I moved to ADSL2 with AA last October (previously on ADSL1 with Newnet).

I live very close to the exchange. I would guess in the hundreds of meters range - the line goes out the kitchen wall and I can walk it to the exchange.

I had always syched at 8mbit on ADSL1 and had assumed I'd see a high sync speed on ADSL2.

Just what is considered high / what should I expect?

From the control panel I see I'm currently synced at 14752K / adsl13000 /13000K.

Speedtest.net show 13Mb/1Mb up/down.

TBH I'm perfectly happy with the speed though I did expect it to be higher.

My router currently shows:

Downstream Upstream
Interleaver Depth 1 1
Line Attenuation(LATN) 7.9 dB 4.9 dB
Signal Attenuation(SATN) 7.3 dB 4.9 dB
Signal-to-Noise Ratio Margin(SNRM) 13.5 dB 6.7 dB
Actual Aggregate Transmit Power (ACATP) 18.6 dB 12.8 dB

I'm a bit more bothered about the line reliability.

Prior to switching to AA last year I've not actually had an always-on router here, so have no comparison for this address. However, a few years ago at a different address I had an ADSL1 always-on line.

From memory, the old ADSL1 line stayed up for weeks if not months at a time.

My current line is lucky to see a few days before the router reports a ping fail and drops/reconnects.

What should I be expecting with ADSL2 (am I mis-remembering ADSL1)?

BTW, I guess it may be pertinent - I'd consider the internal line between the BT master socket and the router to be a bit ropey. It's the standard BT round cable, however it's snakes round the wood work quite a long way (I'd guess 10-15m). I currently redocorating and may replace this cable in the process, as it has no need to be as long as it currently is.

Oo, no, scrub that - I misread your stats, they have a line I've not seen before. What modem are you using?

Edited by deleted (Sun 13-Mar-11 20:05:31)

It's a pci based router with an infineon chipset

http://linitx.com/viewproduct.php?prodid=12181

FYI, I've temporarily replaced the dodgy cable with a bit of cat5 to see if it had any effect, answer: not much...

Downstream Upstream
Interleaver Depth 1 1
Line Attenuation(LATN) 7.0 dB 4.8 dB
Signal Attenuation(SATN) 6.9 dB 4.8 dB
Signal-to-Noise Ratio Margin(SNRM) 13.8 dB 6.5 dB
Actual Aggregate Transmit Power (ACATP) 19.0 dB 12.8 dB

Same sync speed.

Edited by deleted (Sun 13-Mar-11 22:37:09)

Can you post your Sync Speeds exactly as shown by router. I don't understand how you posted. Also ADSL/Line Mode.

Are you on ADSL2 or ADSL2+?

Here's the router status exactly as reported http://www.upsilon.org.uk/router_status.JPG

It's set for ADSL2+

The main determinant is line length and quality; reflected by Attenuation.

You are so near exchange that you should get the max. ADSL2+ Sync of 24 Meg., but your NM is a bit high.