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Forum Discussion

dman97's avatar
dman97
Tutor
Nov 29, 2021

CM2000 Flashing Upstream Light

I  just installed a  CM2000 modem and the upstream light is constatnly flashing.  It  is working fine, I am getting my plan speeds (900/20 Mbps).   Is this something I should to contact Xfinity about...
dman97's avatar
dman97
Tutor
Nov 30, 2021

Is the ISP service box where the cable enters my house?  I have a MoCA splitter there with a POE filter.    Would that be the cause of the errors?

FURRYe38's avatar
FURRYe38
Guru - Experienced User
Nov 30, 2021

Could be. A test you can try, temporarily remove this connector and directly connect the cable to the other side for a more direct connection with the modem. See if the Uplink LED continues to blink or not.