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Vigor 2750n Slow Upload Speed

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21 Apr 2013 20:53 #75908 by babis3g
Replied by babis3g on topic Re: Vigor 2750n Slow Upload Speed

Lorian wrote: My 2750 has remained in its box due to the crippled upload speed. I presume it's because the firmware seems to incorrectly be Annex A.

I will set fire to it next time I burn some rubbish. Given the months of issues I had with the 2800 I should have known better.

One problem is they are no advertising a 2760 "Annex B" device..... Soon be time to waste another £150+ in the hope it might work? I might buy one and try it and send it back under DSR. If I do I'll post up if it works better than the 2750.....


There is Annex B firmware for the 2760
ftp://ftp.draytek.com/Vigor2760/Firmware/

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23 Apr 2013 16:38 #75928 by suprawez
Replied by suprawez on topic Re: Vigor 2750n Slow Upload Speed
The 2750 is supposed to support Annex B, this is from the Draytek website :-


VDSL Standard Support:
ITU-T VDSL2 G.993.2
ITU-T G.993.1, G.997.1
Band Plan: G.998, G.997
Annex A, Annex B, Annex C
VDSL2 Profile: 8a, 8b, 8c, 8d, 12a, 12b, 17a, 30a
OLR Supported
UPBO, DPBO Supported
US0 Supported
Loop Diagnostic Mode
Configurable SNR, INP, Rate Limit
Draytek 2750n on Zen Broadband

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23 Apr 2013 19:49 #75929 by lorian
Replied by lorian on topic Re: Vigor 2750n Slow Upload Speed
So where is the Annex B firmware, I only managed to find annex A......

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23 Apr 2013 22:15 #75932 by suprawez
Replied by suprawez on topic Re: Vigor 2750n Slow Upload Speed

Lorian wrote: So where is the Annex B firmware, I only managed to find annex A......



I've asked Draytek support and awaiting response, will keep you posted.
Draytek 2750n on Zen Broadband

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24 Apr 2013 12:39 #75935 by suprawez
Replied by suprawez on topic Re: Vigor 2750n Slow Upload Speed
Looks like the 2750 supplied in the UK is Annex A only, here is the response from Draytek :-

There is no Annex B firmware for the 2750. The routers that we supply in the UK are only Annex A routers. We have not been informed by BT or any other ISP about Annex B lines or relative requirements for the FTTC connections. The 2760 has not yet been released so I do not have any information on the product relating to anything discussed on the forum. The information available for the 2760 can be found here http://www.draytek.co.uk/products/vigor2760.html . For your reported problem I do not have any further updates yet.

Draytek 2750n on Zen Broadband

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24 Apr 2013 15:16 #75936 by lorian
Replied by lorian on topic Re: Vigor 2750n Slow Upload Speed
I did only a small amount of research:

It's defined in BT's SIN298 Issue 4.3 Section 3.2.2 under R.VDSL2.5

"The modem shall support 17MHz operation using band plan B8-11 (i.e. plan 998ADE17) as defined in Annex B of G.993.2[4]."

http://www.sinet.bt.com/498v4p3.pdf

Some good visualisation of this on bottom of Page 7 here:

http://www.elsinco.hu/szeminarium/pdf/manage_your_todays_and%20future_copper_access_network.pdf

Regards,

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