Just got the email from Zen to say that the BB connection has successfully been upgraded to "up to 16Mbps" this morning.

Joy!

Have got a Vigor 2020n router, have installed the firmware recommended for ADSL2+ Annex M lines, and have changed the modulation to G.992.5 as directed by Zen's email.

Seems to be working and the speed test now shows a download of 6663 kbps (up from 5389) and 731 upload (up from 368). Better figures, which will hopefully improve during the 10 day training period.

Other stats say:
Up speed 888,888 - PREVIOUSLY 448,000
Down speed 7,695,464 - PREVIOUSLY 6,752,000
SNR 15 - PREVIOUSLY 14
Loop Att 33 - PREVIOUSLY 35

The WAN Internet Access settings say:
Multi-PVC channel > Channel 1
VPI > 0
VCI > 38
Encapsulating Type > VC MUX
Protocol > PPPoA
Modulation > ADSL2+ (G.992.5)
WAN Connection Detection > ARP Direct
Ping IP > (BLANK)
TTL > (BLANK)
MTU > 1442 This setting has a note beside it saying Max 1492, which I assume means the MTU number can be manually changed.


I *think* everything is running as it should be, but if anyone has any suggestions for tweaks, I'd be very happy to have some advice.

Cheers

Finn

Not sure about using the special firmware for Annex M - Zen don't offer Annex M - but I would leave as is during the training period.

If your line is stable BT systems may reduce your target SNR giving a corresponding increase in speed - if it does not decrease the target SNR over the next few weeks I would contact support and ask for it to be reduced.

Many thanks for the tips and advice.

I *believe* the firmware does both ADLS2+ and Annex M, so I think it is okay. Or maybe I have misunderstood that?!?

Has been rock solid reliable today.

http://www.draytek.co.uk/support/download/readme_v28...

Will keep an eye on the SNR as you recommend and contact Zen in a couple of weeks if need be.

Cheers

Finn

Edited by deleted (Thu 27-Sep-12 18:08:48)

Hi Mick

Got the line updated today - seamless Zen reliability.

I have got a Vigor 2820n router, for which the firmware notes say:

++++++++++++++++++++++++++++++++++++++++++++++++++++++
Release Notes for Vigor2820 series

Firmware Version : 3.3.7.2 (Release)
Release Date : 19th June 2012
Build Date : 23rd May 2012
Applicable Models : Vigor2820, Vigor2820n, Vigor2820Vn, Vigor2820Vsn
ADSL Modem Code : 232201
Locale : UK Only / Annex A Only (inc UK Annex M)

NOTE: ADSL Modem Codes
For general purpose usage on UK lines, modem code 232201 is recommened
For ADSL2+ Annex M lines, the latest modem code 2471201 is suggested

http://www.draytek.co.uk/support/download/readme_v28...
++++++++++++++++++++++++++++++++++++++++++++++++++++++

If I am now on an ADSL2+ line, do you know if I should use (1) the "general purpose" code or (2) the "ADSL2+ Annex M" code?

The Annex M bit is making me have doubts about using the second option of the firmware.

With thanks in advance

Finn

Hi

You should use the general purpose" code as we dont use Annex M

Your line is running slow. Should be getting about 13 Meg @ 6 dB NM or possibly 11 Meg @ 15 dB NM that you are currently on.

Surprised your attenuation (Loop Att) decreased; usually in increases by 3 dB when going from ADSL to ADSL2+. Could be due to using diff routers.

Forget Annex M. Your ISP don't supply it and with other ISPs it's usually a chargeable extra. It probably won't benefit you anyway.

Hi Mick

Many thanks for the advice. Am now using the general purpose code. My misreading of the Vigor help file.

Many thanks, XRaySpeX. It only switched to ADSL2+ on Thur 27 Sept, so I guess the line is in the training period. Haven't been in for a couple of days, but the router has been on over the weekend and the stats have crept up:

Up speed 1,117,530 - PRE ADSL2+ 448,000
Down speed 9,144,888 - PRE ADSL2+ 6,752,000
SNR 12 - PRE ADSL2+ 14
Loop Att 38 - PRE ADSL2+ 35

So the Loop Att has gone up by 3 dB exactly as you predicted. Possibly/Probably because I had the wrong firmware.

Appreciate all the help everyone on the forum has given. Definitely looks as though things are improving. Can notice the faster download speed.

Over the last couple of years, the speed on my line (connected to the master socket) has gradually dropped:

OCTOBER 2012
Up speed 1,117,530 - PRE ADSL2+ 448,000
Down speed 9,144,888 - PRE ADSL2+ 6,752,000
SNR 12 - PRE ADSL2+ 14
Loop Att 38 - PRE ADSL2+ 35

JULY 2014
Up speed 1,171,805
Down speed 5,272,000
SNR 15
Loop Att 39

Router and wiring still the same. No line noise when completing a BT quiet test.

Anyone have any suggestions?

With thanks

Finn

The rise in target noise margin from 12 to 15 accounts for the drop in speed probably i.e. DLM has kicked in and slowed you down for a reason (exact reason unknown)

couldnt finn123 ask for the DLM to be rest on hes connection?