HG612 stats analysis

Hi All,

Having had FTTC for over 6 years now with various different ISPs (BT, Plusnet, Aquiss amongst others) I have noticed a deterioration of my download speed which once used to be around 72Mbps but with my last ISP (BT) it was around 62Mbps and today I have just switched to Origin broadband (Vodafone) and it is 55Mbps or there abouts.
I suspect over the years that the number of people connected to my local cab has increased somewhat and crosstalk could explain there being a drop. As my speed has dropped from 62Mbps to 55Mbps overnight since my switch from BT to Origin I thought I would unlock my HG612 modem to extract the stats.

Based on the stats below can anyone help explain the reason for the drop in the download speed overnight? (I was under the impression that the 10 day training period was a myth!). Also does anyone know realistically what the max my line should be able to achieve?

Thanks

xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Last initialization procedure status: 0
Max: Upstream rate = 19244 Kbps, Downstream rate = 60400 Kbps
Bearer: 0, Upstream rate = 19244 Kbps, Downstream rate = 60628 Kbps

Link Power State: L0
Mode: VDSL2 Annex B
VDSL2 Profile: Profile 17a
TPS-TC: PTM Mode(0x0)
Trellis: U:ON /D:ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 6.3 6.0
Attn(dB): 16.7 0.0
Pwr(dBm): 12.5 7.3
VDSL2 framing
Bearer 0
MSGc: 18 19
B: 239 239
M: 1 1
T: 64 64
R: 0 14
S: 0.1260 0.3969
L: 15240 5120
D: 1 1
I: 240 127
N: 240 254
Counters
Bearer 0
OHF: 436840 139116
OHFErr: 8 7
RS: 0 309594
RSCorr: 0 11
RSUnCorr: 0 0

Bearer 0
HEC: 9 0
OCD: 0 0
LCD: 0 0
Total Cells: 102983936 0
Data Cells: 708658 0
Drop Cells: 0
Bit Errors: 0 0

ES: 5 6
SES: 0 0
UAS: 25 25
AS: 885

Bearer 0
INP: 0.00 0.00
INPRein: 0.00 0.00
delay: 0 0
PER: 2.02 6.37
OR: 94.87 31.37
AgR: 60722.80 19275.88

Bitswap: 23/24 16/16

Total time = 15 min 10 sec
FEC: 0 11
CRC: 8 7
ES: 5 6
SES: 0 0
UAS: 25 25
LOS: 0 0
LOF: 0 0
LOM: 0 0
Latest 15 minutes time = 10 sec
FEC: 0 0
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Previous 15 minutes time = 15 min 0 sec
FEC: 0 11
CRC: 8 7
ES: 5 6
SES: 0 0
UAS: 25 25
LOS: 0 0
LOF: 0 0
LOM: 0 0
Latest 1 day time = 15 min 10 sec
FEC: 0 11
CRC: 8 7
ES: 5 6
SES: 0 0
UAS: 25 25
LOS: 0 0
LOF: 0 0
LOM: 0 0
Previous 1 day time = 0 sec
FEC: 0 0
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Since Link time = 14 min 43 sec
FEC: 0 11
CRC: 8 7
ES: 5 6
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
#

Looks like you're suffering from G.INP being removed.

When talking about line issues, it is always better to talk about what kind of speed you are referring to. 72, 62 and 55 what? Sync speed? Or throughput?

If talking about line stats, it is almost always best to refer to sync speeds. Right now you are at 60.6Mbps.

When changing ISP, there is always a chance of a DLM reset happening. You currently have no error correction process running, so it is plausible that, overnight, retransmission was turned off. If so, it might turn back on in a couple of days.

Activation of G.INP can come with a small amount of speed improvement.

In reply to a post by WWWombat:

When talking about line issues, it is always better to talk about what kind of speed you are referring to. 72, 62 and 55 what? Sync speed? Or throughput?

If talking about line stats, it is almost always best to refer to sync speeds. Right now you are at 60.6Mbps.

When changing ISP, there is always a chance of a DLM reset happening. You currently have no error correction process running, so it is plausible that, overnight, retransmission was turned off. If so, it might turn back on in a couple of days.

Activation of G.INP can come with a small amount of speed improvement.

Apologies - the speeds indicated are throughput. Having only just unlocked my modem I can't provide any previous sync speed values.

It is probably best as you say to wait a few more days and see if G.INP activates.

When you unlocked it you did use the B030 firmware that supports G.INP?

Edited by smouty (Mon 13-Jun-16 14:55:11)

In reply to a post by smouty:

When you unlocked it you did use the B030 firmware that supports G.INP?

Yes I used B030SP08 which supports G.INP.

Here are my stats 10 days on:

# xdslcmd info --stats
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Last initialization procedure status: 0
Max: Upstream rate = 19217 Kbps, Downstream rate = 60960 Kbps
Bearer: 0, Upstream rate = 19221 Kbps, Downstream rate = 61645 Kbps

Link Power State: L0
Mode: VDSL2 Annex B
VDSL2 Profile: Profile 17a
TPS-TC: PTM Mode(0x0)
Trellis: U:ON /D:ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 6.1 5.9
Attn(dB): 16.7 0.0
Pwr(dBm): 12.6 7.4
VDSL2 framing
Bearer 0
MSGc: 18 20
B: 239 239
M: 1 1
T: 21 64
R: 0 14
S: 0.1239 0.3973
L: 15496 5114
D: 1 1
I: 240 127
N: 240 254
Counters
Bearer 0
OHF: 176033896 1467203
OHFErr: 6041 3200
RS: 0 1118634
RSCorr: 0 11619
RSUnCorr: 0 0

Bearer 0
HEC: 22266 0
OCD: 670 0
LCD: 670 0
Total Cells: 2207056397 0
Data Cells: 923406883 0
Drop Cells: 0
Bit Errors: 0 0

ES: 3868 2791
SES: 1 0
UAS: 23 23
AS: 344870

Bearer 0
INP: 0.00 0.00
INPRein: 0.00 0.00
delay: 0 0
PER: 1.95 6.38
OR: 98.00 32.59
AgR: 61742.81 19253.29

Bitswap: 144922/144922 10939/10942

Total time = 1 days 23 hours 48 min 13 sec
FEC: 0 11619
CRC: 6041 3200
ES: 3868 2791
SES: 1 0
UAS: 23 23
LOS: 0 0
LOF: 0 0
LOM: 0 0
Latest 15 minutes time = 3 min 13 sec
FEC: 0 4
CRC: 3 3
ES: 3 3
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Previous 15 minutes time = 15 min 0 sec
FEC: 0 44
CRC: 61 19
ES: 22 9
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Latest 1 day time = 23 hours 48 min 13 sec
FEC: 0 2456
CRC: 1499 895
ES: 935 755
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Previous 1 day time = 24 hours 0 sec
FEC: 0 4663
CRC: 1794 787
ES: 939 689
SES: 1 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Since Link time = 3 days 23 hours 47 min 49 sec
FEC: 0 11619
CRC: 6041 3200
ES: 3868 2791
SES: 1 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
#
ATP>

My Sync speed looks to be slightly higher at 61.6Mbps - can anyone tell me if G.INP is still deactivated?

In the above data there is only a reference to "Bearer: 0" --

Bearer: 0, Upstream rate = 19221 Kbps, Downstream rate = 61645 Kbps

Hence we can deduce by the absence of "Bearer: 1" that G.Inp is not active on your circuit.

Thanks for that - looks like I will be waiting a little longer for it to be re-activated.

I wonder if you're connected to an ECI cabinet or a Huawei?

ES on the high side.

DLM may intervene downward again.

Ian

In reply to a post by BatBoy:

I wonder if you're connected to an ECI cabinet or a Huawei?

I checked my cab on this site https://www.telecom-tariffs.co.uk/ and it says it is a Huawei cabinet.

It's just looks like you're on fast path which I usually associate with ECI

In reply to a post by maniac886:

I checked my cab on this site https://www.telecom-tariffs.co.uk/ and it says it is a Huawei cabinet.

As you are using a Huawei HG612 as the modem, if you were to establish telnet acess to it and invoke the Busybox shell, then the output produced by the following command will clarify matters --

xdslcmd info --vendor

In the output there will be a line referencing "ChipSet Vendor Id". Following that string will be an identifier. If the identifier begins with BDCM (i.e. Broadcom) then the cabinet is Huawei equipped. If the identifier begins with IFTN (i.e. Infineon) then the cabinet is ECI equipped.

In reply to a post by burakkucat:

In reply to a post by maniac886:

I checked my cab on this site https://www.telecom-tariffs.co.uk/ and it says it is a Huawei cabinet.

As you are using a Huawei HG612 as the modem, if you were to establish telnet acess to it and invoke the Busybox shell, then the output produced by the following command will clarify matters --

xdslcmd info --vendor

In the output there will be a line referencing "ChipSet Vendor Id". Following that string will be an identifier. If the identifier begins with BDCM (i.e. Broadcom) then the cabinet is Huawei equipped. If the identifier begins with IFTN (i.e. Infineon) then the cabinet is ECI equipped.

Just done that and the output is BDCM:0xa48c.

In reply to a post by maniac886:

Just done that and the output is BDCM:0xa48c.

So you have confirmed that you are, indeed, connected via a Huawei equipped cabinet.

Just to provide an update to this thread - in the last day or so G.INP was re-activated and I now have a 6Mbps increase on my downstream sync rate. The speed overall is faster than when I was with BT. I believe its taken over 2 months to re-activate on the line.

That's good news.

There's something interesting about all this. In general I at least, and I think perhaps others, have seen G.INP as being something implemented to improve things when DLM has already put significant interleaving on the line, with a minimum 8ms delay added to latency alongside that interleaving.

In your case there was no interleaving and no "Delay" setting. G.INP has simply improved the sync. I wonder why it didn't do it on Day 3?

Please could you post the current stats?

Edited by RobertoS (Sun 14-Aug-16 10:54:33)

In reply to a post by RobertoS:

That's good news.

There's something interesting about all this. In general I at least, and I think perhaps others, have seen G.INP as being something implemented to improve things when DLM has already put significant interleaving on the line, with a minimum 8ms delay added to latency alongside that interleaving.

In your case there was no interleaving and no "Delay" setting. G.INP has simply improved the sync. I wonder why it didn't do it on Day 3?

Please could you post the current stats?

I had almost given up it ever being activated again. Click the link below to see before and after stats.

Before and after stats

Thanks for the stats .

They tie in with what I said in the post. Interesting.

I thought so http://forums.thinkbroadband.com/fibre/t/4486507-hg6...