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I have no problem with down sync speed but the on the up I do

Luzern
Seasoned Pro
Posts: 3,165
Thanks: 305
Fixes: 2
Registered: 31-07-2007

I have no problem with down sync speed but the on the up I do

Do the  following data look odd?
DSLStats Monitor shows up sync 571 kbps
BTw speed test reads " Upstream Rate IP profile on your line is - 0.83 Mbps".
All the stats for downstream are pretty well what would be expected. Explanation why this discrepancy  exists will be welcome.
No one has to agree with my opinion, but in the time I have left a miracle would be nice.
9 REPLIES
Community Veteran
Posts: 5,094
Thanks: 454
Fixes: 17
Registered: 10-06-2010

Re: I have no problem with down sync speed but the on the up I do

Can you post your full ADSL stats please?
Luzern
Seasoned Pro
Posts: 3,165
Thanks: 305
Fixes: 2
Registered: 31-07-2007

Re: I have no problem with down sync speed but the on the up I do


Is this what is needed?
adsl info --stats
adsl: ADSL driver and PHY status
Status: Showtime
Last Retrain Reason:    8000
Last initialization procedure status:  0
Max:    Upstream rate = 676 Kbps, Downstream rate = 9040 Kbps
Bearer: 0, Upstream rate = 571 Kbps, Downstream rate = 8253 Kbps
Link Power State:      L0
Mode:                  ADSL2+ Annex A
TPS-TC:                ATM Mode(0x0)
Trellis:                U:ON /D:ON
Line Status:            No Defect
Training Status:        Showtime
                Down            Up
SNR (dB):        3.2            11.5
Attn(dB):        46.0            26.4
Pwr(dBm):        0.0            12.8
                        ADSL2 framing
                        Bearer 0
MSGc:          59              12
B:              128            17
M:              1              4
T:              2              4
R:              10              12
S:              0.4982          3.9763
L:              2232            169
D:              64              8
                        Counters
                        Bearer 0
SF:            58398988                346946
SFErr:          12060          296
RS:            3296900925              1272068
RSCorr:        7091077        20759
RSUnCorr:      420623          0
                        Bearer 0
HEC:            295441          750
OCD:            463            0
LCD:            463            0
Total Cells:    1226684946              1272325806
Data Cells:    201354492              13153660
Drop Cells:    0
Bit Errors:    17818618                47971
ES:            11912          576
SES:            181            4
UAS:            688            353
AS:            945463
                        Bearer 0
INP:            1.00            2.00
INPRein:        0.00            0.00
delay:          8              8
PER:            16.19          17.89
OR:            32.11          8.04
AgR:            8253.45 577.17
Bitswap:        338351/338383          930/943
Total time = 22 days 23 hours 24 min 6 sec
FEC:            17057772                137818
CRC:            28158          1373
ES:            11912          576
SES:            181            4
UAS:            688            353
LOS:            3              0
LOF:            26              0
LOM:            37              0
Latest 15 minutes time = 9 min 6 sec
FEC:            12362          23
CRC:            2              0
ES:            2              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:            12035          33
CRC:            8              0
ES:            5              0
SES:            0              0
UAS:            0              0
LOS:            0              0
LOF:            0              0
LOM:            0              0
Latest 1 day time = 23 hours 24 min 6 sec
FEC:            760696          835
CRC:            1552            11
ES:            493            6
SES:            13              0
UAS:            256            0
LOS:            0              0
LOF:            0              0
LOM:            5              0
Previous 1 day time = 24 hours 0 sec
FEC:            600528          750
CRC:            857            21
ES:            458            11
SES:            3              0
UAS:            0              0
LOS:            0              0
LOF:            0              0
LOM:            0              0
Since Link time = 10 days 22 hours 42 min 11 sec
FEC:            7091077        20759
CRC:            12060          296
ES:            5557            133
SES:            53              1
UAS:            268            16
LOS:            0              0
LOF:            0              0
LOM:            12              0
>
No one has to agree with my opinion, but in the time I have left a miracle would be nice.
Community Veteran
Posts: 38,460
Thanks: 1,027
Fixes: 62
Registered: 15-06-2007

Re: I have no problem with down sync speed but the on the up I do

Your upstream attenuation is rather higher than I would have expected and the noise margin is elevated
As a comparison this is from my connection which more or less matches/explains your numbers
Noise Margin:  9.5    dB
Bandwidth:    888    kbps
Attenuation:  26.4  dB
Except this is my downstream which is way lower/worse than yours
Noise Margin:  6.0    dB
Bandwidth:    3927  kbps
Attenuation:  49.5  dB
One thing to try is the test socket as it just may be something in your house such as a filter giving problems
Luzern
Seasoned Pro
Posts: 3,165
Thanks: 305
Fixes: 2
Registered: 31-07-2007

Re: I have no problem with down sync speed but the on the up I do

@OJ
Are you on  2 or 2+? I'm on 2+ with a ~ 3 dB target margin downstream, so with the attenuation I couldn't have a complaint. You say my upstream margin is high, so what would you reckon it ought to be? Just curious. TBH I'm thinking, if the reduction in up sync (which doesn't tie in with BTw) could have happened when I had some problems needing sorting out via Mwbytes gurus. All was Ok then, but DSLStats data has been time wiped.
Would a gateway hop be useful or a resync? With the controversy over slow downs....?
No one has to agree with my opinion, but in the time I have left a miracle would be nice.
Community Veteran
Posts: 38,460
Thanks: 1,027
Fixes: 62
Registered: 15-06-2007

Re: I have no problem with down sync speed but the on the up I do

Just 2
Normally I would expect 6db or 9dB but with an 888kbps limit because it is interleaved
Gateway hop wouldn't help as it is your sync rate which is the problem
You could ask for a reset to 6dB upstream noise margin
Luzern
Seasoned Pro
Posts: 3,165
Thanks: 305
Fixes: 2
Registered: 31-07-2007

Re: I have no problem with down sync speed but the on the up I do

As I tried to say above the 3dB margin has hardly, if ever ,resulted in problems. TBH I cannot see why with the upstream being the problem I need increase the downstream target margin.
No one has to agree with my opinion, but in the time I have left a miracle would be nice.
Community Veteran
Posts: 38,460
Thanks: 1,027
Fixes: 62
Registered: 15-06-2007

Re: I have no problem with down sync speed but the on the up I do

You misunderstood my comment
I was referring to the upstream noise margin only - nothing to do with the downstream margin
Luzern
Seasoned Pro
Posts: 3,165
Thanks: 305
Fixes: 2
Registered: 31-07-2007

Re: I have no problem with down sync speed but the on the up I do

Sorry! It seems age brings thickness to the brain as well as the waist! Grin
Bullet bitten and router has been restarted and now have
SNR (dB):        2.9            9.4
Attn(dB):        46.0            26.4
Thanks!
No one has to agree with my opinion, but in the time I have left a miracle would be nice.
Superuser
Superuser
Posts: 11,562
Thanks: 2,979
Fixes: 22
Registered: 22-08-2007

Re: I have no problem with down sync speed but the on the up I do