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SoNic67's avatar
SoNic67
New Contributor

Internet and voice problems

I have Cox triple play in Hampton Roads area. This is achieved via a Cisco DPQ3212 DOCSIS 3.0 2-PORT Voice Modem, with software revision "d3200-P10-5-c1000r5593-150324a-COX". Since I have installed the Cox service I keep having internet connection drop-outs, at random times. Initially I thought that it was my router, but replacing three of them didn't solve the issue. I have replaced the Cox modem and for a while seemed that helped, but now I have again problems. Even my phone conversations sometimes suffer. The only recurring thing that I can see is that on the 192.168.100.1 page, the "Upstream Channels" have Power levels of 0dBmV on two or three channles whan the internet is out. When I reboot the modem (unplug the cord and the internal battery), problem gets fixed and all the Upstream channels work (around 42dBmV). The downstream channels show around -9dBmV (+/-1dBmV). Any idea what can I do to fix this?
connection issues disconnect

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  • AllenP's avatar
    AllenP
    Valued Contributor

    Sounds like a signal problem.  Have you checked all connectors on the cable?  Make sure each one is secure and tight.  Are there any splitters in the line?  If so, can you bypass them?  You may need a tech visit to check the wiring.

  • SoNic67's avatar
    SoNic67
    New Contributor

    I have a 3-way splitter only. One goes to the Cable Modem, second to the Tuning Adapter and third to my Cable Tuner (SiliconDust Prime).

    I did replaced it with a 2-way splitter, but that means that the Cable Tuner needs to be hooked to the output of the TA. For now I have Downstream signal at -5dB dBmV and Upstream signal 35-38 dBmV. But the signal level to my Cable Tuner dropped to 80%.

     We'll see... 

  • grymwulf's avatar
    grymwulf
    Contributor II

    Upstream channels going to 0 dBmV usually indicate a timeout of some sort, basically the modem lost the link on that channel and is trying to recover it.

    Normal modem operating ranges can be found here: http://www.dslreports.com/faq/3692

    If your modem is disconnecting that often, or the call quality suffers that much, call in and talk to a phone guy; complain of your voice quality.

  • SoNic67's avatar
    SoNic67
    New Contributor

    I have replaced the cable modem and I have still experienced disconnections. The modem operational ranges are almost perfect.

    This is today's disconnection:

    And after pressing the "Reset" button on the modem:

  • grymwulf's avatar
    grymwulf
    Contributor II

    You are definitely having some sort of issue on the upstream, you shouldn't have channels dropping to 0 - again, that is usually a t4 timeout, and will cause hiccups and retrains.  Call in and have them check if your t3/t4 timeouts are accumulating more than 2 or 3 a day - ie jumps of 10+ in any given 2 hr period can be a cause for concern.