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Author Topic: New line, upstream power is negative?  (Read 1714 times)

GigabitEthernet

  • Kitizen
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  • Posts: 2243
New line, upstream power is negative?
« on: March 31, 2018, 11:57:07 AM »

Had a new line "installed" (reactivated) on Tuesday.

Current stats:

Code: [Select]
Max: Upstream rate = 8665 Kbps, Downstream rate = 60160 Kbps
Bearer: 0, Upstream rate = 8665 Kbps, Downstream rate = 58314 Kbps
Bearer: 1, Upstream rate = 0 Kbps, Downstream rate = 0 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): 7.5 5.9
Attn(dB): 23.0 0.0
Pwr(dBm): 12.1 -1.5
VDSL2 framing
Bearer 0
MSGc: -6 26
B: 243 239
M: 1 1
T: 0 47
R: 10 0
S: 0.1332 0.8803
L: 15251 2181
D: 8 1
I: 254 120
N: 254 240
Q: 8 0
V: 0 0
RxQueue: 45 0
TxQueue: 15 0
G.INP Framing: 18 0
G.INP lookback: 15 0
RRC bits: 0 24
Bearer 1
MSGc: 122 -6
B: 0 0
M: 2 0
T: 2 0
R: 16 0
S: 8.0000 0.0000
L: 32 0
D: 1 0
I: 32 0
N: 32 0
Q: 0 0
V: 0 0
RxQueue: 0 0
TxQueue: 0 0
G.INP Framing: 0 0
G.INP lookback: 0 0
RRC bits: 0 0
Counters
Bearer 0
OHF: 0 1491078
OHFErr: 32 500
RS: 1183389648 3328468
RSCorr: 8561003 0
RSUnCorr: 0 0
Bearer 1
OHF: 11405073 0
OHFErr: 0 0
RS: 91240093 0
RSCorr: 274 0
RSUnCorr: 0 0


Retransmit Counters
rtx_tx: 28082 0
rtx_c: 21502 0
rtx_uc: 67 0


G.INP Counters
LEFTRS: 260 0
minEFTR: 58292 0
errFreeBits: 162903945 0


Bearer 0
HEC: 0 0
OCD: 0 0
LCD: 0 0
Total Cells: 3363206573 0
Data Cells: 862407379 0
Drop Cells: 0
Bit Errors: 0 0


Bearer 1
HEC: 0 0
OCD: 0 0
LCD: 0 0
Total Cells: 0 0
Data Cells: 0 0
Drop Cells: 0
Bit Errors: 0 0


ES: 3855 333
SES: 149 2
UAS: 957 900
AS: 183196


Bearer 0
INP: 46.00 0.00
INPRein: 0.00 0.00
delay: 0 0
PER: 0.00 10.38
OR: 0.01 24.65
AgR: 58374.24 8690.05


Bearer 1
INP: 2.00 0.00
INPRein: 2.00 0.00
delay: 0 0
PER: 16.06 0.01
OR: 63.75 0.01
AgR: 63.75 0.01


Bitswap: 78022/83350 156/160


Total time = 1 days 18 hours 44 min 42 sec
FEC: 8561003 0
CRC: 32 500
ES: 3855 333
SES: 149 2
UAS: 957 900
LOS: 3 0
LOF: 7 0
LOM: 0 0
Latest 15 minutes time = 14 min 42 sec
FEC: 6362 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: 546 0
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Latest 1 day time = 18 hours 44 min 42 sec
FEC: 5242311 0
CRC: 5 58
ES: 4 47
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Previous 1 day time = 24 hours 0 sec
FEC: 3081881 0
CRC: 24 409
ES: 11 118
SES: 0 2
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Since Link time = 2 days 2 hours 53 min 15 sec
FEC: 8561003 0
CRC: 32 500
ES: 18 197
SES: 0 2
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
 

The upstream power appears to be negative. The line seems fine, I'm just wondering why the power is like this when my other line has power at 5dB+.
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roseway

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  • Posts: 43568
  • Penguins CAN fly
    • DSLstats
Re: New line, upstream power is negative?
« Reply #1 on: March 31, 2018, 12:44:23 PM »

The upstream power isn't negative. The units are dBm (dB relative to 1 milliwatt). A negative value means that the power is less than 1 mW.
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  Eric

GigabitEthernet

  • Kitizen
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  • Posts: 2243
Re: New line, upstream power is negative?
« Reply #2 on: March 31, 2018, 01:42:07 PM »

So what's the power then and why is it so much lower than my other line, just curious as all
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kitz

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  • Senior Kitizen
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  • Posts: 33883
  • Trinity: Most guys do.
    • http://www.kitz.co.uk
Re: New line, upstream power is negative?
« Reply #3 on: March 31, 2018, 01:48:08 PM »

You may be best comparing power levels from pbParams rather than the aggregate figure which can sometimes be wrong.   

Code: [Select]
============================================================================
      VDSL Band Status    U0      U1      U2      U3      D1      D2      D3
  Line Attenuation(dB):  0.5    17.6    26.7     N/A    10.6    23.4    36.8   
Signal Attenuation(dB):  0.4    17.4    26.7     N/A    10.4    23.2    36.8   
        SNR Margin(dB): 13.3    12.8    11.9     N/A     6.3     6.3     6.3   
   Transmit Power(dBm):- 4.7   -26.6     6.5     N/A    11.9     7.4     7.4   
============================================================================

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