TTB to BT Infinity 2 Speed Drop

I was with TTB and was seeing around 71Mbps and have recently (2 weeks) switched to BT Infinity 2 and I am only getting around 64Mbps which does appear to be in line with the checker on the low end of a clean line. I am pretty close to the cabinet (can see it from my Window).

The cabinet is an Huawei cabinet so I recently switched to a HG612 (was using a Vigor 130) the speeds where the same on both btw, I didn't expect it to so anything other than I've read its best to use a Broadcom chip with the Huawei cabinets.

Please find my line stats below. Anything looks out of the ordinary? thanks in advance. It may just be the way of things but I *might* go back to TTB if the price rises affect me from BT since I only signed up two weeks ago!

# xdslcmd info --pbParams
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Last initialization procedure status: 0
Max: Upstream rate = 27682 Kbps, Downstream rate = 69708 Kbps
Bearer: 0, Upstream rate = 20000 Kbps, Downstream rate = 69256 Kbps

Discovery Phase (Initial) Band Plan
US: (7,32) (871,1205) (1972,2782)
DS: (33,859) (1216,1961) (2793,3959)
Medley Phase (Final) Band Plan
US: (7,32) (871,1205) (1972,2782)
DS: (33,859) (1216,1961) (2793,3959)
VDSL Port Details Upstream Downstream
Attainable Net Data Rate: 27682 kbps 69708 kbps
Actual Aggregate Tx Power: 1.1 dBm 12.4 dBm
====================================================================================
VDSL Band Status U0 U1 U2 U3 U4 D1 D2 D3
Line Attenuation(dB): 5.1 15.1 21.1 N/A N/A 7.8 17.2 25.5
Signal Attenuation(dB): 5.1 14.5 20.6 N/A N/A 10.1 17.0 25.5
SNR Margin(dB): 10.4 10.7 10.7 N/A N/A 6.3 6.3 6.3
TX Power(dBm): -14.0 -28.5 1.0 N/A N/A 8.2 7.8 7.0


xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Last initialization procedure status: 0
Max: Upstream rate = 27682 Kbps, Downstream rate = 69708 Kbps
Bearer: 0, Upstream rate = 20000 Kbps, Downstream rate = 69256 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 10.7
Attn(dB): 12.5 0.0
Pwr(dBm): 12.4 1.1
VDSL2 framing
Bearer 0
MSGc: 18 20
B: 239 239
M: 1 1
T: 22 64
R: 0 0
S: 0.1103 0.3819
L: 17408 5028
D: 1 1
I: 240 120
N: 240 240
Counters
Bearer 0
OHF: 46560909 192972
OHFErr: 419 192
RS: 0 1997854
RSCorr: 0 0
RSUnCorr: 0 0

Bearer 0
HEC: 2682 0
OCD: 85 0
LCD: 85 0
Total Cells: 2734157353 0
Data Cells: 210634870 0
Drop Cells: 0
Bit Errors: 0 0

ES: 332 182
SES: 0 0
UAS: 26 26
AS: 85066

Bearer 0
INP: 0.00 0.00
INPRein: 0.00 0.00
delay: 0 0
PER: 1.82 6.13
OR: 105.09 33.91
AgR: 69361.05 20033.74

Bitswap: 16554/16554 1/1

Total time = 23 hours 38 min 12 sec
FEC: 0 0
CRC: 419 192
ES: 332 182
SES: 0 0
UAS: 26 26
LOS: 0 0
LOF: 0 0
LOM: 0 0
Latest 15 minutes time = 8 min 12 sec
FEC: 0 0
CRC: 1 1
ES: 1 1
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 0
CRC: 0 1
ES: 0 1
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Latest 1 day time = 23 hours 38 min 12 sec
FEC: 0 0
CRC: 419 192
ES: 332 182
SES: 0 0
UAS: 26 26
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 = 23 hours 37 min 45 sec
FEC: 0 0
CRC: 419 192
ES: 332 182
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0

Do you have a set of stats with you having the higher speed please? I'm particularly interested in the SNR margin.

It could be that the sync-time figure had been reduced to 5, 4 or even 3dB by the Openreach DLM, and has been reset on the migration. That would account for the drop, and it should self-correct in a while if that is what has happened.

In reply to a post by RobertoS:

Do you have a set of stats with you having the higher speed please? I'm particularly interested in the SNR margin.

It could be that the sync-time figure had been reduced to 5, 4 or even 3dB by the Openreach DLM, and has been reset on the migration. That would account for the drop, and it should self-correct in a while if that is what has happened.

Sorry I am afraid I don't because I only recently switched back to the OR modem

That's one of the things they don't tell you when you sign up with a new service provider is that it might take a few months to get the optimal speed you were getting before

Thanks for that. Maybe just stick with BT for a couple of months see what happens.

Just an aside - It looks like your sig is at least two ISPs out of date .

In reply to a post by RobertoS:

Just an aside - It looks like your sig is at least two ISPs out of date .

Thanks for pointing that out I have updated it now.

In reply to a post by RobertoS:

Do you have a set of stats with you having the higher speed please? I'm particularly interested in the SNR margin.

It could be that the sync-time figure had been reduced to 5, 4 or even 3dB by the Openreach DLM, and has been reset on the migration. That would account for the drop, and it should self-correct in a while if that is what has happened.

Can you have a look over my graph how is it looking? BT Infinity 2 Connection I am interpreting the results as pretty good (if I am right )

Edited by deleted (Thu 16-Nov-17 09:57:48)

The reason for your speed drop is due to G.INP not being enabled yet on your line.

hmm ok, should I ask BT to enable that? or....?

Actually looks like DLM has to reactivate it on its own.

Edited by deleted (Thu 16-Nov-17 10:20:13)

No, just wait. It will come on automatically, providing your modem is running firmware B030SP08 which supports G.INP

In reply to a post by BatBoy:

No, just wait. It will come on automatically, providing your modem is running firmware B030SP08 which supports G.INP

Yes running correct version.

Firmware

Edited by deleted (Thu 16-Nov-17 10:32:45)

Lost G.INP on my line with an ISP move came back a few weeks later, and then also gained a bit more as xDB trial kicked in - 29 Mbps on 1.2km of copper with 33 Mbps sync

Alas an ISP regrade has reset DLM again it seems so back to 24 Mbps for a while

Assuming you were busy using connection from 10pm to 2am that looks good. The spike every 20 minutes or so, maybe some software doing an upload/sync/download with a timer

In reply to a post by ansam:

I was with TTB and was seeing around 71Mbps
switched to BT Infinity 2 and I am only getting around 64Mbps
in line with the checker on the low end of a clean line

Bearer: 0, Upstream rate = 20000 Kbps, Downstream rate = 69256 Kbps

Note that the checker provides estimates in the form of "line speed", which is the same as the sync speed, not the download speed.

Thus you are currently getting 69Mbps, not 64Mbps.

That spike every 20minutes is an oddity. I suffered it for quite a while and then it suddenly disappeared. It was there even when there was just a modem and router installed with nothing else connected. I have seen it in a few other places too, but could never get to the reason.

I used to get similar spikes, though not quite that frequently.

Nowadays, the only ones I see are the ones triggered by my SamKnows box running its tests.

Mine were usually about 22minutes, but sometimes they would widen to 30 or 40 minutes. I have not had it here for a couple of years though.

From 2014

http://tinypic.com/r/33pdi87/9

Edited by MHC (Thu 16-Nov-17 13:41:24)