G.INP on long lines to fibre

I have read recently that G.INP has been added to help improve fibre connections

Firstly is there a speed improvement?

Secondly my cabinet has only been activated in the last few days. Can I assume that G.INP will available on this cabinet.

I am currently on ADSL+ LLU and am wondering if upgrading to fibre will be worth the extra cost.

How far are you from the cabinet and what does the checker result say?

G.INP is not some kind of 'turbo' feature. It's just one of the mechanisms that FTTC DLM can use to deal with noisy lines. If your line is noisy then G.INP is a better solution than interleaving or cutting the connection speed. G.INP doesn't increase speed really - it just avoids the speed having to be reduced.

What it comes down to is that if you don't currently have fibre there's no need to concern yourself with G.INP. It shouldn't affect your decision whether to upgrade or not and it's entirely possible your line may not need it anyway.

Edited by Andrue (Sat 19-Sep-15 22:08:57)

In reply to a post by gdavid:

I have read recently that G.INP has been added to help improve fibre connections

Firstly is there a speed improvement?

Secondly my cabinet has only been activated in the last few days. Can I assume that G.INP will available on this cabinet.

I am currently on ADSL+ LLU and am wondering if upgrading to fibre will be worth the extra cost.

Depends on which cabinet you also have, if it Hauwei, then G.INP will become active, if you on a ECI cabinet then G.INP isn't availble yet.

Check at https://www.dslchecker.bt.com/ to see what speed you can get.

Edited by Nightglow (Sat 19-Sep-15 23:15:55)

The only increase in speed that you get from g.inp is where interleaving is taken off. THat can steal several mbps. It doesn't increase the basic speed the line is capable of bu, perhaps, makes it a bit more likely that it can be achieved and remain stable.

Thanks for all the replies.

The DSLChecker is not up to date. Only BT are showing that fibre is available and quoting 6 to 10 Mb/s, but being an LLU line cannot be exact.

I am on the Midhurst, Sussex exchange and cabinet 6. Don't know how to check the equipment in it. I am 1.38Km from the cabinet and is all copper.

Speed test
http://www.thinkbroadband.com/speedtest/results.html...

The router specs are as follows:-
These of course are back to the exchange.

Status
xDSL
xDSL
Mode ADSL_G.dmt
Traffic Type ATM
Status Up
Link Power State L0
Downstream Upstream
Line Coding (Trellis) On On
SNR Margin (dB) 5.3 12.0
Attenuation (dB) 59.0 31.5
Output Power (dBm) 17.1 12.5
Attainable Rate (Kbps) 2708 624
Rate (Kbps) 2432 480
K (number of bytes in DMT frame) 77 16
R (number of check bytes in RS code word) 8 8
S (RS code word size in DMT frame) 2.00 2.00
D (interleaver depth) 32 2
Delay (msec) 16.00 4.00
INP (DMT symbol) 0.79 0.04
Super Frames 37738818 37738818
Super Frame Errors 13659 1438
RS Words 1283119779 320781551
RS Correctable Errors 1172142 2020
RS Uncorrectable Errors 201064 0
HEC Errors 109056 900
OCD Errors 173 0
LCD Errors 173 0
Total Cells 3679632320 0
Data Cells 207311861 0
Bit Errors 0 0
Total ES 3642 0
Total SES 98 0
Total UAS 26 26

Edited by deleted (Sun 20-Sep-15 14:49:55)

If you have found the cabinet, pictures here.

LLU makes no difference to connection speed on FTTC. It's strange that the DSL checker isn't up-to-date. Did you use the full address option? Where and how did you get the BT estimate?

Edited by RobertoS (Sun 20-Sep-15 15:30:48)

I think the OP means he can't do the telephone number check because he's currently on LLU, so assume he did an address check (as opposed to postcode check - the postcode check doesn't show the cabinet always).

Edited by mlp (Sun 20-Sep-15 16:02:40)

Cab6 on midhurst is Huawei, so capable of G.INP - cab was enabled 21st August, so other providers should have the information. Not sure, but because of the low predicted speed, some providers might not allow you to order FTTC (don't quote me on that, probably OK with BT or plus net)

Thanks - I found the details here

http://www.dslchecker.bt.com/pls/adsl/ADSLChecker.Ad...

I'll have a look at the cabinet tomorrow when I drive by it.