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Author Topic: Stable connection despire very low SNR margin-puzzle  (Read 4634 times)

konrado5

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Stable connection despire very low SNR margin-puzzle
« on: April 03, 2014, 06:23:22 PM »

From 5 days I have SNR margin 0.4-0.9 dB because I have tweaked my SNR margin. I am surprised I haven't got any disconnections and not very much CRC errors and ES on fast path without Impulse Noise Protection. I have about 100-200 errored seconds and slight more CRC errors. How is it possible?

Best regards
konrado5
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konrado5

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Re: Stable connection despire very low SNR margin-puzzle
« Reply #1 on: April 03, 2014, 06:28:32 PM »

Followint there are CRC graphs.
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konrado5

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Re: Stable connection despire very low SNR margin-puzzle
« Reply #2 on: April 03, 2014, 09:47:32 PM »

My SNR margin has just raised to 1.1 dB.
Code: [Select]
adsl info --stats
adsl: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 8000
Max:    Upstream rate = 1244 Kbps, Downstream rate = 20560 Kbps
Path:   0, Upstream rate = 1233 Kbps, Downstream rate = 17835 Kbps

Link Power State:       L0
Mode:                   ADSL2+
Trellis:                U:ON /D:ON
Line Status:            No Defect
Training Status:        Showtime
                Down            Up
SNR (dB):       1.2             6.8
Attn(dB):       24.5            14.6
Pwr(dBm):       18.5            12.2
                        ADSL2 framing
MSGc:           51              16
B:              211             37
M:              1               1
T:              3               3
R:              0               0
S:              0.3797          0.9774
L:              4466            311
D:              1               1
                        Counters
SF:             31394831                395195
SFErr:          14907           0
RS:             0               0
RSCorr:         0               0
RSUnCorr:       0               0

HEC:            6391            0
OCD:            194             0
LCD:            0               0
Total Cells:    4260441931              2782487094
Data Cells:     219127906               256798841
Drop Cells:     0
Bit Errors:     0               10403

ES:             14413           184
SES:            1               0
UAS:            107             785
AS:             509690

INP:            0.00            0.00
PER:            16.23           16.12
delay:          0.09            0.24
OR:             28.08           10.91

Bitswap:        121176          21

Best regards
konrado5
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burakkucat

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Re: Stable connection despire very low SNR margin-puzzle
« Reply #3 on: April 03, 2014, 10:34:39 PM »

There is very little to be said . . . other than "Thank you for showing us the graphs."

You are clearly blessed with a very stable circuit.  :)  I don't think anyone in the UK would be able to use a broadband circuit with the target SNRM set as low as 1 dB.  :-\
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konrado5

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Re: Stable connection despire very low SNR margin-puzzle
« Reply #4 on: April 03, 2014, 10:39:54 PM »

It is surprising it is such stable despire poor Hlog.
Best regards
konrado5
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konrado5

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Re: Stable connection despire very low SNR margin-puzzle
« Reply #5 on: April 04, 2014, 08:46:05 PM »

I've just tweaked my SNR margin slight more and I have 0.0-0.1 dB and about 1000 ES per hour.

Best regards
konrado5
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konrado5

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Re: Stable connection despire very low SNR margin-puzzle
« Reply #6 on: April 05, 2014, 01:54:51 PM »

BER test at SNR margin 0.1 dB:
Code: [Select]
Test Time (sec):    360
Total Transferred Bits:    0x00000001611FB100
Total Error Bits:    0x0000000000000C18
Error Ratio:    5.23e-07

Best regards
konrado5
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kitz

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Re: Stable connection despire very low SNR margin-puzzle
« Reply #7 on: April 06, 2014, 03:19:34 PM »

I've just tweaked my SNR margin slight more and I have 0.0-0.1 dB and about 1000 ES per hour.


*speechless*

Why on earth have you done that?   :-\
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konrado5

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Re: Stable connection despire very low SNR margin-puzzle
« Reply #8 on: April 06, 2014, 03:41:07 PM »

I've just tweaked my SNR margin slight more and I have 0.0-0.1 dB and about 1000 ES per hour.


*speechless*

Why on earth have you done that?   :-\
To test.
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Black Sheep

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Re: Stable connection despire very low SNR margin-puzzle
« Reply #9 on: April 06, 2014, 04:13:46 PM »

I've just tweaked my SNR margin slight more and I have 0.0-0.1 dB and about 1000 ES per hour.


*speechless*

Why on earth have you done that?   :-\

Konrado ...... although you are 'barking', you do put a smile on my face. I think you also make Kitz consume TWO bottles of plonk a day, rather than the obligatory one !!. Keep experimenting.  ;) ;D ;D ;D
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neilius

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Re: Stable connection despire very low SNR margin-puzzle
« Reply #10 on: April 06, 2014, 06:54:48 PM »

Good man, rules are made to be broken.   >:D
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GigabitEthernet

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Re: Stable connection despire very low SNR margin-puzzle
« Reply #11 on: April 06, 2014, 08:22:04 PM »

Oh Konrado, you do make me laugh :D.

If I'm feeling sad, I just open a Konrado thread and I can't help but laugh :lol:.

Thanks buddy ;).
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GigabitEthernet

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Re: Stable connection despire very low SNR margin-puzzle
« Reply #12 on: April 06, 2014, 08:22:38 PM »

*speechless*

Why on earth have you done that?   :-\

LOL. I just laughed very hard :D.

 :lol: :lol: :lol: :lol: :lol:
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