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[SamBGB]

Hello,

I have noticed the last couple of days that my line seems to be dropping or at least thats the symptom, when I check the modem it still says Showtime. The internal network all seems to be working fine from what I can tell. Please could you take a look at my stats.

Do you see anything that could be concerning etc?

To be honest I am convinced it was a BT issue but just want to start ruling things out.

Code: [Select]


====================================================================================
    VDSL Training Status:   Showtime
                    Mode:   VDSL2 Annex B
            VDSL Profile:   Profile 17a
                G.Vector:   Disable
            Traffic Type:   PTM Mode
             Link Uptime:   0 day: 0 hour: 25 minutes
====================================================================================
       VDSL Port Details       Upstream         Downstream
               Line Rate:     20.033 Mbps       74.728 Mbps
    Actual Net Data Rate:     20.000 Mbps       74.729 Mbps
          Trellis Coding:         ON                ON
              SNR Margin:       11.2 dB            6.5 dB
            Actual Delay:          0 ms              0 ms
          Transmit Power:        2.1 dBm          12.4 dBm
           Receive Power:      -16.3 dBm          -1.0 dBm
              Actual INP:        0.0 symbols      49.0 symbols
       Total Attenuation:        0.0 dB          12.5 dB
Attainable Net Data Rate:     28.676 Mbps       76.954 Mbps
====================================================================================
  VDSL Band Status        U0      U1      U2      U3      U4      D1      D2      D3
  Line Attenuation(dB): 5.6 15.3 22.1   N/A   N/A 7.8 16.8 25.8
Signal Attenuation(dB): 5.6 14.8 21.7   N/A   N/A 10.0 16.6 25.8
        SNR Margin(dB): 10.9 11.0 11.3   N/A   N/A 6.4 6.5 6.5
         TX Power(dBm): -13.3 -28.4 1.9   N/A   N/A 8.1 7.8 7.1
====================================================================================

            VDSL Counters

           Downstream        Upstream
Since Link time = 25 min 55 sec
FEC: 97 0
CRC: 0 1
ES: 0 1
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Latest 15 minutes time = 11 min 24 sec
FEC: 26 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: 71 0
CRC: 0 1
ES: 0 1
SES: 0 0
UAS: 28 28
LOS: 0 0
LOF: 0 0
LOM: 0 0
Latest 1 day time = 26 min 24 sec
FEC: 97 0
CRC: 0 1
ES: 0 1
SES: 0 0
UAS: 28 28
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
Total time = 26 min 24 sec
FEC: 97 0
CRC: 0 1
ES: 0 1
SES: 0 0
UAS: 28 28
LOS: 0 0
LOF: 0 0
LOM: 0 0
====================================================================================
 
Thanks
Sam

[burakkucat]

Hello Sam. Welcome to the Kitz forum.

Link Uptime:   0 day: 0 hour: 25 minutes

At the time you harvested those statistic, the ITU-T G.993.2 (a.k.a VDSL2) link had been up for 25 minutes.

Previous 15 minutes time = 15 min 0 sec
FEC:      71      0
CRC:      0       1
ES:       0       1
SES:      0       0
UAS:      28      28
LOS:      0       0
LOF:      0       0
LOM:      0       0

In the 15 minute period prior to the then current period there were 28 UAS (unavailable seconds) recorded. I suspect that those unavailable seconds were the result of the modem undergoing a re-train.

There's not much else that I can see.

[Edited to clarify the statement about the 28 UAS.]

[kitz]

Cant see anything wrong with the actual line stats.   Sync speed seems about right for the attenuation.    Line has G.INP.


Line has been up for 25 mins caused by a sync lasting 28 secs... but there is insufficient data there to know what caused the [re]sync. 
However I note there is no previous days data which indicates a full power cycle of the modem, thus unlikely to be caused by anything at BT/Openreaches end.  A standard resync doesn't usually clear all the counters.       

You may be best monitoring with DSLstats to see if you can see anything going on with the SNRMargin as I notice its at 6.5db so gone up .2 db since sync.   That in itself isn't a problem, but indicates that your SNRM may vary slightly.


--
ETA -  My post crossed with b*cats.
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