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Jdoog23's avatar
Jdoog23
Aspirant
Feb 06, 2020

CM700 Modem keeps dropping and speeds are super slow

As of the begining of this week my cable modem keeps dropping service and is having horrible speed problem. I have COX with the 300mbps plan and I am barely pulling 30mbps on a good day. I have looked at the modem logs and noticed a lot of timeouts and partial service. Along with horrible power levels on the upstream. Please help advise if its the modem or provider. Here is my log and connection results.

 

3 Replies

  • FURRYe38's avatar
    FURRYe38
    Guru - Experienced User
    Feb 06, 2020

    Have the ISP check the signal and line quality UP to the modem. 
    Be sure there are not coax cable line splitters in the between the modem and ISP service box. 
    Be sure your using good quality RG6 coax cable up to the modem. 

    Be sure to test speeds directly connected to the modem with a wired LAN cable PC. Test with a different PC to compare results.

  • plemans's avatar
    plemans
    Guru - Experienced User
    Feb 07, 2020

    do what FURRYe38 recommended. 

    check your lines/connectors/splitters/amplifiers. Your downstream channels 13-22 are way out of spec on power and its giving you a bunch of errors. You should be ideally between -7dbmv and +7dbmv. Those channels are more than -20dbmv. 

    so check the coax line yourself within your home and if it stays the same, your isp needs to check your lines.