Just brought myself a brand new Netgear DGND3700 Wireless-N600 Dual Band Gigabit ADSL2+ Wireless Modem Router and I was very impressed with the highest sync rate, thanks to this high performance router.

Before on ADSL:

ADSL Link Downstream Upstream
Connection Speed 8128 kbps 448 kbps
Line Attenuation 30.5 db 16.1 db
Noise Margin 6.2 db 9.3 db

Now on ADSL2+:

ADSL Link Downstream Upstream
Connection Speed 18739 kbps 1279 kbps
Line Attenuation 32.5 db 17.4 db
Noise Margin 3.3 db 6.3 db

http://www.speedtest.net/result/1724403220.png

Hi Robert,

You do mean the test socket inside the master? Not the normal external socket.

Yes, the test socket inside the master socket.

Are you using any phone extension cables to reach the sockets, and have you tried different filters?

There is only one extension (upstairs) and that is wired in properly to the back of the master socket downstairs. I'm then using a standard RJ11 cable from the router to this socket.

If you remove the master faceplate, do all extensions stop working?

Yes.

Have you got a phone-connected burglar alarm?

No. Haven't got Sky either. Just two phones (one per extension) and the broadband. All filtered using ADSLNation filters (no faceplates). Tried replacement filters and other brands but still the same.

Edit: I have also done the quiet line test (17070) from both the test socket and the extension and it's fine - no noise. I have a feeling this is just the way it's going to be.

Edited by aquilla (Mon 23-Jan-12 20:14:54)

In reply to a post by aquilla:

Q: Can anyone offer any insight into why I am only getting 10Mbps on a line with 34.0dB attenuation? At the moment I'm connected to the upstairs extension but I get the same reading (and same sync speed) in the test socket. Tried different filters and routers but get the same. If that's the way it is then fine.

That's the way it is. To get max sync -12Mbps? - you need a Broadcom-based router.

Hi Batboy,

As I thought. So long as the Cisco box remains stable and happy then I'm happy. I would replace the Cisco but I'm a Cisco engineer so I like to use what I work with.

Ask Xilo to put you on the Service-Profile 20 (INP1) which is for none broadcom chipsets.

Edited by deleted (Tue 24-Jan-12 20:36:03)

In reply to a post by HighBeta:

Ask Xilo to put you on the Service-Profile 20 (INP1) which is for none broadcom chipsets.

@HighBeta,

What exactly is "Service-Profile 20" and how will it affect the connection (advantages / disadvantages)?

In reply to a post by HighBeta:

Ask Xilo to put you on the Service-Profile 20 (INP1) which is for none broadcom chipsets.

I'm pretty sure the Cisco supports extended INP No real need to switch it off.

http://www.support.draytek.co.uk/kb_vigor_inp.html

Adding to what BatBoy says, there is an extension to INP that is implemented by Broadcom, which is why a Broadcom-chipped router is best, (apart from one poster's experience), on Be which has Broadcom line cards and defaults to use that extension.

What is being said here is that, (I don't know but it looks logical), the Service Profile 20 does not activate the extension, so routers that don't support that extension may work better than if it is activated.

Thank goodness for Broadcom routers, I just moved in to a new property and signed up for Xilo Be 16. My Netgear DG834GT reports 60.5db downstream attenuation but with a DGTeam firmware and the noise margin tweaked to 50% of default I'm getting a stable 4.5Mb.