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[les-70]

  I sent a copy of the 039  adsl_phy.bin file from the ZyXEL VMG8324-B10A firmware to Luiz in Brazil who has a Sagemcom F@st 5350 GV.

   He obtained a good improvement in the attainable rates.  Here is his reply.   I though it would be of interest and he said I could post it. (note that it contains a useful reference re adsl_phy's)

"My ISP GVT give me this modem "Fast 5350GV", you can view teardown here http://www.tripleoxygen.net/wp/2013/10/sagemcom-fst-5350-gv-teardown/ ,sorry in Portuguese."

and

"Hi Les,
Thank you!!! Tested and works fine here
First impression in my long line, is about 1100 meters from DSLAM.
Max. down rate raise in more 10mbps, my band plan is lock to 2600Kbps UP and 27500Kbps DOWN.

BLOB A2pv6F038f2
Code: [Select]
xdslctl info --pbParams
Max: Upstream rate = 2749 Kbps, Downstream rate = 33412 Kbps
Bearer: 0, Upstream rate = 2595 Kbps, Downstream rate = 27495 Kbps

Discovery Phase (Initial) Band Plan
US: (32,63) (882,1193) (1984,2770)
DS: (65,857) (1218,1959) (2795,4083)
Medley Phase (Final) Band Plan
US: (32,63) (882,1193)
DS: (73,857) (1218,1915)
VDSL Port Details Upstream Downstream
Attainable Net Data Rate: 2749 kbps 33412 kbps
Actual Aggregate Tx Power: 7.3 dBm 13.0 dBm
====================================================================================
VDSL Band Status U0 U1 U2 U3 U4 D1 D2 D3
Line Attenuation(dB): 12.9 53.1 60.6 N/A N/A 25.6 65.1 90.3
Signal Attenuation(dB): 12.9 51.9 N/A N/A N/A 25.6 65.0 N/A
SNR Margin(dB): 6.8 6.9 N/A N/A N/A 14.8 14.8 N/A
TX Power(dBm): 2.3 5.6 N/A N/A N/A 11.8 6.7 N/A


And BLOB A2pv6F039g1
Code: [Select]
xdslctl info --pbParams
Max: Upstream rate = 2754 Kbps, Downstream rate = 44708 Kbps
Bearer: 0, Upstream rate = 2598 Kbps, Downstream rate = 27495 Kbps

Discovery Phase (Initial) Band Plan
US: (32,63) (882,1193) (1984,2770)
DS: (65,857) (1218,1959) (2795,4083)
Medley Phase (Final) Band Plan
US: (32,63) (882,1193)
DS: (73,857) (1218,1935)
VDSL Port Details Upstream Downstream
Attainable Net Data Rate: 2754 kbps 44708 kbps
Actual Aggregate Tx Power: 7.4 dBm 13.1 dBm
====================================================================================
VDSL Band Status U0 U1 U2 U3 U4 D1 D2 D3
Line Attenuation(dB): 12.6 52.1 60.6 N/A N/A 25.2 63.9 91.6
Signal Attenuation(dB): 12.6 51.3 N/A N/A N/A 25.3 63.8 N/A
SNR Margin(dB): 6.7 6.5 N/A N/A N/A 14.8 14.8 N/A
TX Power(dBm): 2.3 5.7 N/A N/A N/A 11.9 6.9 N/A


Another change is BitSwaps, I have about 25 swaps/min, now have about 3 swaps/min.
Well, I need more run time to see what happen with other parameters.

Interesting link about adsl_phy  http://bcm63xx.sipsolutions.net/AdslPhy
I think you need A2pv6C0xx for SoC 6368 and A2pv6F0xx to 63168."

[kitz]

Im afraid I know zilch when it comes to router firmwares and adsl phys, but if I read what you are saying correctly...

afaik adsl_phy is the part of the router firmware that does the DMT modulation at the physical layer (ok Im on familiar ground again if youre talking modulation & DMT & bit loading). 
So can I therefore conclude that  the adsl_phy is the group of functions & all the algorithms in the code that handles DMT, bit loading, error handling, bit swap  etc - basically its the heart of any router firmware responsible for controlling a good stable dsl connection.


So by stripping out the adsl_phy from the Zyxel VMG8324-B10A firmware and using it to replace the adsl_phy in another router firmware, then it has improved a fairly long line by 10Mbps. 

If so thats some going. 
I know I saw an improvement of 3.5Mbps on a short line, but I wasnt sure how it would affect performance on longer lines.
As a few more people have bought a VMG8324 recently so Im hoping to see results trickle through soon.

[les-70]

   I think your your interpretation is correct.  As you say it is an impressive change.   

I wasted $30 inc postage on an vector supporting HG630 from China, supplied unpacked to reduce postage.  It gave me a 1.5Mb/s improvement but is now in the tip recycling bin.  I have the USA firmware file (it was already running that in fact) for the device so I was able to extract the files in it from the firmware.  It had an 037 adsl_phy and like the zyxel uses the 63168 BCM chip. Unfortunately it was not running either telnet or ssh even though they are in the firmware. I tried to solder up a serial connection with header pins, I have done that successfully quite a few times before on other devices.  However one hole remained blocked and I tried a 1mm drill to clear it.  The drill caught the pcb strip and lifted it ouch!!    effectively destroying the router before I could try any adsl_phy swapping.  I will be very reluctant to use a drill to clear a hole like that again!!!

[kitz]

oooh  ouch indeed 

[RJM]

  I sent a copy of the 039  adsl_phy.bin file from the ZyXEL VMG8324-B10A firmware to Luiz in Brazil who has a Sagemcom F@st 5350 GV.

Hi Les-70,
I also do have this modem Sagemcom 5350 GV,
and wanting to use it for a different ISP Operator. Therefor I do need to change the VCI from 35 to 33.
Do you know if there is a possibility for me to change this VCI into 33 ?
Or do I need to use this "dsl_phy.bin file from the ZyXEL VMG8324-B10A firmware" which you send to Luiz in Brazil ?

Regards RJM.

[les-70]

 The dsl-phy.bin should have no relevance at all to your issue.  Indeed you may not be starting with the same version. 

  I have never used a Sagemon and can't really help.  Usually that setting would be available under the basic connection settings and unless the firmware is ISP specific I would have expected the Sagemon GUI to allow you just change the VCI.  However as I said it might have firmware locked to the original ISP.   

[RJM]

Thanks for your f@st reply Les-70,
indeed it is a specific ISP, GVT, Firmware, and the VCI isn´t shown in the GUI.
Do you know if there is a possibility to upload a free/open firmware?

Regards, RJM.

[les-70]

  I don't know of any.  You could try an internet search.

[RJM]

Thanks. After a very long time searching on the internet, this topic, is the most closest to it.
Do you still have a contact possibility with Luiz in Brazil ?

[les-70]

  No but he is/was lucas-10 on this forum and you may be able to pm him.

[RJM]

Thanks again for your F@st reply,
did send a pm to Luiz/lucas-10.
Regards, RJM.