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[William Grimsley]

I've been told by mlmclaren that G.INP will increase my line rate!

[S.Stephenson]

I've been told by mlmclaren that G.INP will increase my line rate!

You won't really know until it actually happens....

Staring at it isn't going to make G.INP activate quicker, it will just make it drag on and on.

Best thing to do is just wait for the e-mail from DSLWS, in fact if you were to benefit in real terms from G.INP then you'd notice it being activated and wouldn't have to watch it constantly.

[William Grimsley]

I'm not watching MDWS constantly!

[kitz]

G.INP can not improve the line rate on a line which does not have INP, Interleaving or FEC.
G.INP can only give back any overheads taken from FEC and Interleaving.
G.INP can stablise a line experiencing errors, by reducing the error rate. 

Your line is now on an open profile, no INP, no Interleaving, no FEC overhead.   There's no where it can get any additional speed from unless your SNRm is slightly better. 

The reason I said last week that G.INP would help you, is because at that time, you were banded at 35k... and had Interleaving, INP & FEC applied.

[William Grimsley]

But, why? Like I've said interleaved ADSL lines have increased line rates, whereas fastpath ADSL lines have lower line rates...

I may have been banded at 35 Mbps but without the banding, my line would have probably been syncing at around 40 Mbps, so when G.INP activated, the line rate would increase further.


Admin note - This is NOT the case.   FEC overheads will reduce line rate in 99% of cases.
You are correct that without banding the line would sync at 40Mbps. - But it wont with Interleaving and FEC/INP.
See below for proof

[kitz]

Heres the proof when you had interleaving.

18/04/2016 - Full Line stats immediately after product upgrade.
   Note: Cap still in place. G.INP removed and Interleaving and Forward Error Correction applied.  Overheads from FEC redundancy reduce line rate.

xDSL
Mode   VDSL2
Traffic Type   PTM
Status   Up
Link Power State   L0
Downstream   Upstream
Line Coding (Trellis)   On   On
SNR Margin (dB)   6.6   6.3
Attenuation (dB)   25.8   0.0
Output Power (dBm)   12.0   5.8
Attainable Rate (Kbps)   45458   8015
Rate (Kbps)   34999   8015
B (# of bytes in Mux Data Frame)   47   239
M (# of Mux Data Frames in an RS codeword)   1   1
T (# of Mux Data Frames in an OH sub-frame)   64   42
R (# of redundancy bytes in the RS codeword)   14   0
S (# of data symbols over which the RS code word spans)   0.0436   0.9514
L (# of bits transmitted in each data symbol)   11368   2018
D (interleaver depth)   743   1
I (interleaver block size in bytes)   62   120
N (RS codeword size)   62   240
Delay (msec)   8   0

Note only 6.6db.    Interleaving/INP/FEC eat into your SNR Margin.
Its your SNRM that dictates your sync speed, but those overheads also artificially inflate max attainable on some routers.
Thats why I said a few days back I estimated you'd get ~42 Mbps.   That is why I also put that note on there for passing to the engineer.
I had a strong suspicion that your router was artificially inflating your max attainable due to FEC overheads.

[kitz]

Now compare to these - when you werent interleaved

02/02/16 - Line stats with new router

              Downstream   Upstream
   Line attenuation (dB):     25.8      0.0
   Signal attenuation (dB):   Not monitored     
   Connection speed (kbps):   35000      8493
   SNR margin (dB):           9.7      6.7
   Power (dBm):               12.0      5.8
   Interleave depth:          8      2
   INP:                       54.00      53.00
   G.INP:                     Enabled
   Attainable Rate (Kbps)     44479   8897     

   RSCorr/RS (%):             0.0001      0.0010
   RSUnCorr/RS (%):           0.0000      0.0000
   ES/hour:                   0      0

See now how your SNRM was 9.7dB?   That means you had far more available sync speed, because INP wasnt eating into anything,  but you were being capped.

G.INP can give back what INP takes away, but it cant magic more speed from nowhere.
You may get a little bit more if the framing params change..  and a bit more if your SNRm is different...  but it wont be that much.

[kitz]

Like I've said interleaved ADSL lines have increased line rates, whereas fastpath ADSL lines have lower line rates...

Im sorry, but Ive read that sentence about 6 times, and Im not sure what you are trying to say.

[William Grimsley]

Fair enough. What I'm trying to say is on ADSL the line rate is normally higher when the line is in an intereleaved state rather than a fastpath state.

I'm not trying to be rude here, but I still think as other like mlmclaren have pointed out that when G.INP activates, my line rate will go up by 4 - 5 Mbps...


Admin note:  [here you obviously disagree when I said G.INP can't magic up 4/5 Mbps on a line which is on open profile]

[roseway]

Then you'll have to wait to find out. You've been given the best advice available, and if you choose not to believe it, that's up to you. But wishful thinking won't achieve anything.

[William Grimsley]

I'm not saying a definite answer, I'm just trying to discuss this interesting possibility.

[NewtronStar]

William when your line was banded at 35000 kbps the SNRm will increase, just like manually capping your sync on the HG612 or 8800nl the SNRm will increase but with less sync rate

The Banding of your circuit from 40000 kbps to 35000 kbps causd the SNRm to be much higher than the 6dB target margin

Now do you understand

[Dray]

I've been told by mlmclaren that G.INP will increase my line rate!

Did he say how G.INP will increase your line rate?

[tbailey2]

IMHO, I think you will LOSE some sync speed, maybe 1-2mbps.

G.INP is an error correction protocol and needs bandwidth to perform that. You don't have any spare b/width now as you are not interleaved (and you already gained 5mbps or so from being unbanded) so I doubt it can magic up some for Bearer 1 to do its job and sort your current horrendous errors. So that bandwidth surely has to be stolen from the existing amount available.....

Feel free to correct me if I'm wrong.

[burakkucat]

. . . but I still think as other like mlmclaren have pointed out that when G.INP activates, my line rate will go up by 4 - 5 Mbps...

Unfortunately that is just not correct.