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Forum Discussion

greeno's avatar
greeno
Apprentice
Apr 27, 2019

cm600 xfinity T3 error then bufferbloat

Hi, i have blast pro (250down/10up) with xfinity in 94550.  the cm600, firmware version shows V1.01.18,  is connected to a ubiquiti edgerouter-x running latest 1.10.9 firmware.  i use the smart que...
greeno's avatar
greeno
Apprentice
Apr 27, 2019

there's a splitter infront of the cm600 to feed the xfinity digital voice.  i've removed that splitter and the levels are instantly better:

 

<tabindex=-1>Downstream Bonded Channels</tabindex=-1>
Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables
1 Locked QAM256 22 597000000 Hz -4.9 dBmV 38.5 dB 0 0
2 Locked QAM256 1 465000000 Hz -2.3 dBmV 40.0 dB 0 0
3 Locked QAM256 2 471000000 Hz -2.7 dBmV 39.9 dB 0 0
4 Locked QAM256 3 477000000 Hz -2.7 dBmV 39.9 dB 0 0
5 Locked QAM256 4 483000000 Hz -2.7 dBmV 39.9 dB 0 0
6 Locked QAM256 5 489000000 Hz -2.8 dBmV 39.9 dB 0 0
7 Locked QAM256 6 495000000 Hz -2.9 dBmV 39.9 dB 0 0
8 Locked QAM256 15 555000000 Hz -4.5 dBmV 38.9 dB 0 0
9 Locked QAM256 16 561000000 Hz -4.6 dBmV 38.7 dB 0 0
10 Locked QAM256 17 567000000 Hz -4.8 dBmV 38.7 dB 0 0
11 Locked QAM256 18 573000000 Hz -4.8 dBmV 38.7 dB 0 0
12 Locked QAM256 19 579000000 Hz -4.8 dBmV 38.6 dB 0 0
13 Locked QAM256 20 585000000 Hz -4.6 dBmV 38.8 dB 0 0
14 Locked QAM256 21 591000000 Hz -4.7 dBmV 38.6 dB 0 0
15 Locked QAM256 23 603000000 Hz -4.9 dBmV 38.5 dB 0 0
16 Locked QAM256 24 609000000 Hz -4.7 dBmV 38.6 dB 0 0
17 Locked QAM256 25 615000000 Hz -4.7 dBmV 38.5 dB 0 0
18 Locked QAM256 26 621000000 Hz -4.9 dBmV 38.2 dB 0 0
19 Locked QAM256 27 627000000 Hz -5.2 dBmV 37.9 dB 0 0
20 Locked QAM256 28 633000000 Hz -5.3 dBmV 37.8 dB 0 0
21 Locked QAM256 29 639000000 Hz -5.4 dBmV 37.8 dB 0 0
22 Locked QAM256 30 645000000 Hz -5.5 dBmV 37.5 dB 0 0
23 Locked QAM256 31 651000000 Hz -5.5 dBmV 37.6 dB 0 0
24 Locked QAM256 32 657000000 Hz -5.6 dBmV 37.5 dB 0 0
 
<tabindex=-1>Upstream Bonded Channels</tabindex=-1>
Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power
1 Locked ATDMA 2 5120 Ksym/sec 23700000 Hz 47.3 dBmV
2 Locked ATDMA 1 5120 Ksym/sec 17300000 Hz 47.0 dBmV
3 Locked ATDMA 3 5120 Ksym/sec 30300000 Hz 48.0 dBmV
4 Locked ATDMA 4 5120 Ksym/sec 36700000 Hz 49.3 dBmV
5 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
6 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
7 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
8 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV

 

i'm not sure what to do about this... so next text is disconnect the voice modem and reintroduce the splitter...

plemans's avatar
plemans
Guru - Experienced User
Apr 27, 2019

Is this at the point where it enters the house? 

  • greeno's avatar
    greeno
    Apprentice
    Apr 27, 2019

    yep.  it's a 1682g.  i think there's a etma only modem that's approved by xfinity.  might that help?

    • plemans's avatar
      plemans
      Guru - Experienced User
      Apr 27, 2019

      I would have to believe after seeing all this info that the modem is fine and its the signal coming in.  If that's right where it comes into the housee, I'd contact xfinity (if thats who you use) and have a discussion about power/signal levels and having them check it. 

      • greeno's avatar
        greeno
        Apprentice
        Apr 27, 2019

        thanks.  i'll post back...