Soldato
- Joined
- 20 Oct 2008
- Posts
- 12,082
Doesn't this mean the connection is effectively no longer running over twisted pair? You've just got two parallel wires (that are twice as thick).
Post your FTTC line stats & unlocking info
- Thread starter Locky
- Start date
Doesn't this mean the connection is effectively no longer running over twisted pair? You've just got two parallel wires (that are twice as thick).
No it's still running on the Ethernet twisted pair but A is running over a whole twisted pair and B is doing the same but yes it would be twice the thickness. Doing the above without Ethernet cable will kill your speed if you double up the BT cable as it is pants. Does that make any sense?
Last edited:
Soldato
- Joined
- 20 Oct 2008
- Posts
- 12,082
Or have you done something different?
Nope it is the same as the lower pic but that is still twisted. I thought i would get some extra by joining a pair from the outside BT wire that only has a few twists in it and it sapped 2000kbps out of the connection.
The Ethernet cable seems completely different. I'm replacing the one on the outside with external cat6 Ethernet cable later this week i'll be doing the same to that too.
Soldato
- Joined
- 20 Oct 2008
- Posts
- 12,082
If you've connected it as in the picture then, from an electrical point-of-view, you haven't got a twisted pair cable.
Yep that is true as the twisted pair are suppose to cancel out the noise from the other leg but Cat6/Cat6a the pairs are separated down the length of the line that might be the reason for no speed loss as their is a physical barrier between each pair.
I replaced the cable from the point the wire comes out the ground and is crimped into this cheap crappy white cable and gained about 500kps but it was only about a meters worth and it was alu.
That backs up the figures that i got good to know it can be duplicated, So your line in your house is optimized its just BT's side that isn't
, That's what i am trying to get the last thing is the cable outside that connects the house then thats it i can't do anymore tweaking wiring wise.I'll post again when my line has stabilized after the alteration.
That backs up the figures that i got good to know it can be duplicated, So your line in your house is optimized its just BT's side that isn't
I'll post again when my line has stabilized after the alteration.
tbh my attainable rate is over 100mbit as I can see the cab out of the window
but I wasn't keen on the last meter with Alu in it.This estate is only 5 years old so it was a bit ***** of BT to install Alu into the house when the D-side is .5 copper. It may have been a contractor that did this though.
@cjd78
So basically, there's no longer a need for a copper run going from the PCP back to the exchange? Is that correct? Oh and who is "we"?
Your employer?
Assuming 80Mb/s for each line, that's a total demand of 7.68Gb/s. Wouldn't an 8Gb/s or 10Gb/s line be better? Or are you gambling on not that many people watching YouTube HD or torrenting?
So basically, there's no longer a need for a copper run going from the PCP back to the exchange? Is that correct? Oh and who is "we"?
Your employer?Assuming 80Mb/s for each line, that's a total demand of 7.68Gb/s. Wouldn't an 8Gb/s or 10Gb/s line be better? Or are you gambling on not that many people watching YouTube HD or torrenting?
Just had Infinity installed in the new house. Luckily I had an old Infinity modem from the old house, so I could hack that one
New House..
(with QoS off....)
Old House :*(
btw, where do you get the short DSL BT cables to replace the long one you get with the modem? Ours is behind the settee, so it can be as short as humanly possible.
Code:
# xdslcmd info --show
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Max: Upstream rate = 25450 Kbps, Downstream rate = 54784 Kbps
Path: 0, Upstream rate = 20000 Kbps, Downstream rate = 54410 Kbps
Link Power State: L0
Mode: VDSL2 Annex B
VDSL2 Profile: Profile 17a
TPS-TC: PTM Mode
Trellis: U:ON /D:ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 6.1 9.3
Attn(dB): 0.0 0.0
Pwr(dBm): 11.2 6.6
VDSL2 framing
Path 0
B: 239 236
M: 1 1
T: 64 5
R: 0 16
S: 0.1404 0.3771
L: 13677 5410
D: 1 1
I: 240 255
N: 240 255
Counters
Path 0
OHF: 296246 109237
OHFErr: 7 0
RS: 0 2801964
RSCorr: 0 7
RSUnCorr: 0 0
Path 0
HEC: 110 0
OCD: 0 0
LCD: 0 0
Total Cells: 69855346 0
Data Cells: 1054462 0
Drop Cells: 0
Bit Errors: 0 0
ES: 6 0
SES: 0 0
UAS: 31 31
AS: 669
Path 0
INP: 0.00 0.00
PER: 2.24 6.12
delay: 0.00 0.00
OR: 85.48 203.67
Bitswap: 66 0
Code:
# xdslcmd info --pbParams
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Max: Upstream rate = 25436 Kbps, Downstream rate = 54660 Kbps
Path: 0, Upstream rate = 20000 Kbps, Downstream rate = 54410 Kbps
Discovery Phase (Initial) Band Plan
US: (0,95) (880,1195) (1984,2771)
DS: (32,859) (1216,1959) (2792,4083)
Medley Phase (Final) Band Plan
US: (0,95) (880,1195) (1984,2771)
DS: (32,859) (1216,1959) (2792,4083)
VDSL Port Details Upstream Downstream
Attainable Net Data Rate: 25436 kbps 54660 kbps
Actual Aggregate Tx Power: 6.6 dBm 11.2 dBm
============================================================================
VDSL Band Status U0 U1 U2 U3 D1 D2 D3
Line Attenuation(dB): 3.6 31.2 47.3 N/A 16.9 42.0 62.8
Signal Attenuation(dB): 3.6 31.1 47.2 N/A 16.9 42.0 62.8
SNR Margin(dB): 10.4 9.3 9.3 N/A 6.1 5.9 6.1
TX Power(dBm): -5.1 -11.2 6.3 N/A 8.6 7.4 -1.8New House..
(with QoS off....)
Old House :*(
btw, where do you get the short DSL BT cables to replace the long one you get with the modem? Ours is behind the settee, so it can be as short as humanly possible.
Last edited:
You get them from Tandy online.
Well i done the external cat6 outside and removed the 3 meters of BT crap outside. I have an Retraining code of 8000 does anyone know what this means? I managed to get a bit more out of my connection now my house is maxed out i'm going to try a reboot early in the morning and see what happens after that i guess i just have to wait for vectoring here are the stats
xdslcmd info --pbParams
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 8000
Max: Upstream rate = 8533 Kbps, Downstream rate = 53444 Kbps
Path: 0, Upstream rate = 8495 Kbps, Downstream rate = 45713 Kbps
Discovery Phase (Initial) Band Plan
US: (0,95) (868,1207) (1972,2783)
DS: (32,859) (1216,1963) (2792,3959)
Medley Phase (Final) Band Plan
US: (0,95) (868,1207) (1972,2783)
DS: (32,859) (1216,1963)
VDSL Port Details Upstream Downstream
Attainable Net Data Rate: 8533 kbps 53444 kbps
Actual Aggregate Tx Power: 1.1 dBm 11.0 dBm
============================================================================
VDSL Band Status U0 U1 U2 U3 D1 D2 D3
Line Attenuation(dB): 7.4 37.7 57.9 N/A 17.7 46.4 72.1
Signal Attenuation(dB): 7.4 37.0 52.4 N/A 17.7 46.4 N/A
SNR Margin(dB): 6.2 6.2 6.3 N/A 6.1 6.2 N/A
TX Power(dBm): -4.5 -5.2 -2.4 N/A 8.1 7.9 N/A
here are the stats xdslcmd info --pbParams
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 8000
Max: Upstream rate = 8533 Kbps, Downstream rate = 53444 Kbps
Path: 0, Upstream rate = 8495 Kbps, Downstream rate = 45713 Kbps
Discovery Phase (Initial) Band Plan
US: (0,95) (868,1207) (1972,2783)
DS: (32,859) (1216,1963) (2792,3959)
Medley Phase (Final) Band Plan
US: (0,95) (868,1207) (1972,2783)
DS: (32,859) (1216,1963)
VDSL Port Details Upstream Downstream
Attainable Net Data Rate: 8533 kbps 53444 kbps
Actual Aggregate Tx Power: 1.1 dBm 11.0 dBm
============================================================================
VDSL Band Status U0 U1 U2 U3 D1 D2 D3
Line Attenuation(dB): 7.4 37.7 57.9 N/A 17.7 46.4 72.1
Signal Attenuation(dB): 7.4 37.0 52.4 N/A 17.7 46.4 N/A
SNR Margin(dB): 6.2 6.2 6.3 N/A 6.1 6.2 N/A
TX Power(dBm): -4.5 -5.2 -2.4 N/A 8.1 7.9 N/A
Associate
Checked my modem stats and noticed I am getting a lower upload sync speed than a couple of weeks ago.
Previously I was getting 20000kbps, then it dropped to 17000kbps and something. After turning the modem off today at around 13:40, it's now at 18094 kbps. I really want it back to 20000kbps. What, if anything, can I do to achieve that nice sync speed I was previously getting?
I usually lose around 2mb when comparing sync speed to actual so I have come down from 18mb up, to 16mb all because I unplugged my modem
As for d/l, that never seems to change.
A lot of those stats I'm not even sure about (are they good, average?). I've seen people mentioning attenuation quite a lot.
Previously I was getting 20000kbps, then it dropped to 17000kbps and something. After turning the modem off today at around 13:40, it's now at 18094 kbps. I really want it back to 20000kbps. What, if anything, can I do to achieve that nice sync speed I was previously getting?
I usually lose around 2mb when comparing sync speed to actual so I have come down from 18mb up, to 16mb all because I unplugged my modem
As for d/l, that never seems to change.
Code:
# xdslcmd tool --pbParams
xdslcmd: invalid command
# xdslcmd info --pbParams
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Max: Upstream rate = 18094 Kbps, Downstream rate = 90652 Kbps
Path: 0, Upstream rate = 18282 Kbps, Downstream rate = 79987 Kbps
Discovery Phase (Initial) Band Plan
US: (0,95) (868,1207) (1972,2783)
DS: (32,859) (1216,1963) (2792,3959)
Medley Phase (Final) Band Plan
US: (0,95) (868,1207) (1972,2783)
DS: (32,859) (1216,1963) (2792,3959)
VDSL Port Details Upstream Downstream
Attainable Net Data Rate: 18094 kbps 90652 kbps
Actual Aggregate Tx Power: - 5.7 dBm 13.0 dBm
============================================================================
VDSL Band Status U0 U1 U2 U3 D1 D2 D3
Line Attenuation(dB): 2.1 9.6 25.3 N/A 5.3 14.7 21.5
Signal Attenuation(dB): 2.1 8.7 24.2 N/A 5.3 14.7 21.5
SNR Margin(dB): 5.8 5.9 5.8 N/A 8.9 8.9 9.0
TX Power(dBm): -19.7 -33.2 -5.9 N/A 9.5 7.7 7.0A lot of those stats I'm not even sure about (are they good, average?). I've seen people mentioning attenuation quite a lot.
Last edited:
feedback on strange behaviour of my FTTC w/ Sky
hi there guys,
I'd like to hear your opinion on my FTTC line stats, just to give you a bit of background...
Had the service installed on Jun 12th, started perfect, i have the 40/10 w/ Sky, 39996/9996 sync, ping 12ms, happy. Then on sunday 16th connection went down for like 10 mins and when it came back DLM kicked in and lowered the speed to 27400 / 9996.
....long story short, i had a BT engineer check the line on the following wed, said everything is OK, he checked the sync with his tool and it shown 35000 and during these past weeks connection improved, speed changed a bit, I have restarted it maybe just once (so it was up for 28 days which i thought was the logging period as the BT guy said b4 they reset stats...) first ping changed, then download speed a bit, then upload, then right now it seems to be stuck on the following 35000 / 9996 and 13ms ping which is actually good and very stable, solid.
However, i'd like to understand why i am not getting the 39996 i had before, some people said sometimes DLM recovers in UP TO 6 weeks, but is that a myth or is really like that?
Interestingly, i am 150mts walking distance from the nearest BT fibre cabinet, no strange plugs or extensions and the BT engineer also told me "you should get good speed indeed", and i often walk past it just behind the corner
BTW i removed QoS as someone suggested here and had a nice boost in the upload, nice trick!!!! Is there any drawback by doing so?
here are my stats:
# xdslcmd info --stats
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Max: Upstream rate = 10908 Kbps, Downstream rate = 46704 Kbps
Path: 0, Upstream rate = 9995 Kbps, Downstream rate = 35000 Kbps
Link Power State: L0
Mode: VDSL2 Annex B
VDSL2 Profile: Profile 17a
TPS-TC: PTM Mode
Trellis: U:ON /D:ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 8.5 6.4
Attn(dB): 0.0 0.0
Pwr(dBm): 12.0 -6.6
VDSL2 framing
Path 0
B: 239 235
M: 1 1
T: 64 7
R: 0 16
S: 0.2182 0.7508
L: 8799 2717
D: 1 1
I: 240 255
N: 240 255
Counters
Path 0
OHF: 1474773 437016
OHFErr: 40 17
RS: 0 1756802
RSCorr: 0 80
RSUnCorr: 0 0
Path 0
HEC: 9 0
OCD: 0 0
LCD: 0 0
Total Cells: 347593607 0
Data Cells: 4759952 0
Drop Cells: 0
Bit Errors: 0 0
ES: 28 16
SES: 0 0
UAS: 215 215
AS: 5169
Path 0
INP: 0.00 0.00
PER: 3.49 11.82
delay: 0.00 0.00
OR: 59.57 152.21
Bitswap: 4 1
Total time = 1 hours 30 min 44 sec
FEC: 0 0
CRC: 40 0
ES: 28 16
SES: 0 0
UAS: 215 215
LOS: 0 0
LOF: 0 0
Latest 15 minutes time = 44 sec
FEC: 0 0
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
Previous 15 minutes time = 15 min 0 sec
FEC: 0 0
CRC: 4 0
ES: 2 3
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
Latest 1 day time = 1 hours 30 min 44 sec
FEC: 0 0
CRC: 40 0
ES: 28 16
SES: 0 0
UAS: 215 215
LOS: 0 0
LOF: 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
Since Link time = 1 hours 26 min 7 sec
FEC: 0 80
CRC: 40 17
ES: 28 16
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
#
# xdslcmd info --pbParams
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Max: Upstream rate = 10924 Kbps, Downstream rate = 46704 Kbps
Path: 0, Upstream rate = 9995 Kbps, Downstream rate = 35000 Kbps
Discovery Phase (Initial) Band Plan
US: (0,95) (880,1195) (1984,2771)
DS: (32,859) (1216,1959) (2792,4083)
Medley Phase (Final) Band Plan
US: (0,95) (880,1195) (1984,2771)
DS: (32,859) (1216,1959) (2792,4083)
VDSL Port Details Upstream Downstream
Attainable Net Data Rate: 10924 kbps 46704 kbps
Actual Aggregate Tx Power: - 6.6 dBm 12.0 dBm
============================================================================
VDSL Band Status U0 U1 U2 U3 D1 D2 D3
Line Attenuation(dB): 0.1 7.3 10.5 N/A 4.5 10.3 18.4
Signal Attenuation(dB): 0.1 7.3 10.4 N/A 4.5 10.3 18.4
SNR Margin(dB): 6.8 6.9 6.1 N/A 8.6 8.5 8.4
TX Power(dBm): -11.3 -128.0 -8.4 N/A 9.9 7.4 0.8 7.4 0.8
when i look at the MAX speed the line supports, it doesn't look great since im so close to the cabinet, what is your diagnosis? bad cables?
- these stats are from this morning, i just rechecked them now and this is what i get, apparently showing that is going up slowly?
Max: Upstream rate = 10978 Kbps, Downstream rate = 46852 Kbps
Path: 0, Upstream rate = 9995 Kbps, Downstream rate = 35000 Kbps
- as you can see from the stats, i had restarted the BTO modem this morning
- since the last engineer visit on june 19 (he went to the cabinet, he did "something", DSL light and phone went down like 5 minutes), i have restarted it just a few days ago (so it stayed up like 4 weeks), i just did a "reset" with the button to see if things would change but no
thanks a lot guys!
Gabrio
hi there guys,
I'd like to hear your opinion on my FTTC line stats, just to give you a bit of background...
Had the service installed on Jun 12th, started perfect, i have the 40/10 w/ Sky, 39996/9996 sync, ping 12ms, happy. Then on sunday 16th connection went down for like 10 mins and when it came back DLM kicked in and lowered the speed to 27400 / 9996.
....long story short, i had a BT engineer check the line on the following wed, said everything is OK, he checked the sync with his tool and it shown 35000 and during these past weeks connection improved, speed changed a bit, I have restarted it maybe just once (so it was up for 28 days which i thought was the logging period as the BT guy said b4 they reset stats...) first ping changed, then download speed a bit, then upload, then right now it seems to be stuck on the following 35000 / 9996 and 13ms ping which is actually good and very stable, solid.
However, i'd like to understand why i am not getting the 39996 i had before, some people said sometimes DLM recovers in UP TO 6 weeks, but is that a myth or is really like that?
Interestingly, i am 150mts walking distance from the nearest BT fibre cabinet, no strange plugs or extensions and the BT engineer also told me "you should get good speed indeed", and i often walk past it just behind the corner
BTW i removed QoS as someone suggested here and had a nice boost in the upload, nice trick!!!! Is there any drawback by doing so?
here are my stats:
# xdslcmd info --stats
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Max: Upstream rate = 10908 Kbps, Downstream rate = 46704 Kbps
Path: 0, Upstream rate = 9995 Kbps, Downstream rate = 35000 Kbps
Link Power State: L0
Mode: VDSL2 Annex B
VDSL2 Profile: Profile 17a
TPS-TC: PTM Mode
Trellis: U:ON /D:ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 8.5 6.4
Attn(dB): 0.0 0.0
Pwr(dBm): 12.0 -6.6
VDSL2 framing
Path 0
B: 239 235
M: 1 1
T: 64 7
R: 0 16
S: 0.2182 0.7508
L: 8799 2717
D: 1 1
I: 240 255
N: 240 255
Counters
Path 0
OHF: 1474773 437016
OHFErr: 40 17
RS: 0 1756802
RSCorr: 0 80
RSUnCorr: 0 0
Path 0
HEC: 9 0
OCD: 0 0
LCD: 0 0
Total Cells: 347593607 0
Data Cells: 4759952 0
Drop Cells: 0
Bit Errors: 0 0
ES: 28 16
SES: 0 0
UAS: 215 215
AS: 5169
Path 0
INP: 0.00 0.00
PER: 3.49 11.82
delay: 0.00 0.00
OR: 59.57 152.21
Bitswap: 4 1
Total time = 1 hours 30 min 44 sec
FEC: 0 0
CRC: 40 0
ES: 28 16
SES: 0 0
UAS: 215 215
LOS: 0 0
LOF: 0 0
Latest 15 minutes time = 44 sec
FEC: 0 0
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
Previous 15 minutes time = 15 min 0 sec
FEC: 0 0
CRC: 4 0
ES: 2 3
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
Latest 1 day time = 1 hours 30 min 44 sec
FEC: 0 0
CRC: 40 0
ES: 28 16
SES: 0 0
UAS: 215 215
LOS: 0 0
LOF: 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
Since Link time = 1 hours 26 min 7 sec
FEC: 0 80
CRC: 40 17
ES: 28 16
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
#
# xdslcmd info --pbParams
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Max: Upstream rate = 10924 Kbps, Downstream rate = 46704 Kbps
Path: 0, Upstream rate = 9995 Kbps, Downstream rate = 35000 Kbps
Discovery Phase (Initial) Band Plan
US: (0,95) (880,1195) (1984,2771)
DS: (32,859) (1216,1959) (2792,4083)
Medley Phase (Final) Band Plan
US: (0,95) (880,1195) (1984,2771)
DS: (32,859) (1216,1959) (2792,4083)
VDSL Port Details Upstream Downstream
Attainable Net Data Rate: 10924 kbps 46704 kbps
Actual Aggregate Tx Power: - 6.6 dBm 12.0 dBm
============================================================================
VDSL Band Status U0 U1 U2 U3 D1 D2 D3
Line Attenuation(dB): 0.1 7.3 10.5 N/A 4.5 10.3 18.4
Signal Attenuation(dB): 0.1 7.3 10.4 N/A 4.5 10.3 18.4
SNR Margin(dB): 6.8 6.9 6.1 N/A 8.6 8.5 8.4
TX Power(dBm): -11.3 -128.0 -8.4 N/A 9.9 7.4 0.8 7.4 0.8
when i look at the MAX speed the line supports, it doesn't look great since im so close to the cabinet, what is your diagnosis? bad cables?
- these stats are from this morning, i just rechecked them now and this is what i get, apparently showing that is going up slowly?
Max: Upstream rate = 10978 Kbps, Downstream rate = 46852 Kbps
Path: 0, Upstream rate = 9995 Kbps, Downstream rate = 35000 Kbps
- as you can see from the stats, i had restarted the BTO modem this morning
- since the last engineer visit on june 19 (he went to the cabinet, he did "something", DSL light and phone went down like 5 minutes), i have restarted it just a few days ago (so it stayed up like 4 weeks), i just did a "reset" with the button to see if things would change but no
thanks a lot guys!
Gabrio
Last edited:
Soldato
http://www.thinkbroadband.com/news/5929-reminder-about-the-reality-of-dlm-on-openreach-fttc.html could be worth a read. I don't know anything about FTTC stats though... as they still haven't turned my shiny new FTTC cabinet on yet .
.
With your line attenuation as low as it is across all the bands I'm surprised by the low sync. I would say your D side (line) is no more than 200 meters in length and should be up for a bit more.
You have 8.5dB SNR margin which is a big higher than expected and should be around 6.
I would say the engineer you had was one of the many useless ones that BT employ and doesn't have a clue, I would bagger sky for a resolution.
hi Locky,
Thanks for the feedback, hmhm in all honestly yeah the cabinet's so close i am surprised myself when i saw these values just today. On the other hand, i refreshed stats a few times since this morning and the MAX attainable rate is growing, wouldn't it be wise to say that when it reaches a certain level, given that is still going up, then the sync will go back to 39996 ? It might end up for 6 weeks...sloowwwwwww
I'm trying to understand what is the correlation though. Now is 46856 > Sync 35000 that's a 10.000 gap more or less...wouldn't make some sense that if it goes to say 50000 then it will sync me back to 39996? Just a theory....
I might give Sky a call but i don't think they will send a BT engineer just for a small difference, in all honestly is going very well this line right now.
i'm trying to understand all values in the FTTC stats, is there a glossary or something?
Gab
Is all the wiring in your offerent correct, the modem is not on an extension or anything like that?