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.
Disable LAG on the CM modem,
Try a different brand/model modem to see if the problem continues or not. If not, then the problem maybe the modem.
Seems like if you have tried two 1200s and they both do same thing, seems like the issue maybe ISP signal.
@Cust1234 wrote:
Have had 4 cases over the last few weeks on the same issue without resolution or appropriate follow up. Stay on hold for hours with no escalation provided and was even hung up on by the last rep. Why should anybody use these products with this level of support?
Issue - Upstream light blinking green constantly
Symptom - Numerous devices (especially VOIP) experiencing sporadic packet loss with eventual loss of upstream service.
ISP - Spectrum
Par for the course, Spectrum blames Netgear and Netgear blames Spectrum. I have had multiple technician visits by Spectrum who can't find any issues with my coax or anything I am responsible for (except the Netgear CM1200 which I own). Not using their issued DOCSIS 3.1 Hitron modem due to Puma chipset which is what led me to the CM1200 in the first place (it is on the Spectrum approved list). I ruled out defective Netgear equipment as I received a second CM1200, both exhibiting the same symptoms. I do not believe this is a Netgear device problem however I need Netgear Engineering to work with me to align Spectrum that it is their problem. I have tried all of the standard remedies (reboots, device resets, connected modem to Spectrum feed into my house, replaced modem, etc.).
What I have asked for is Netgear Engineering on the phone with Spectrum Engineering as I believe it is some configuration on the Spectrum server side but Spectrum will not move on anything without Netgear. Is there a phone number for escalation within Netgear, specifically to Engineering? Anybody else having similar issues with the CM1200 and/or Spectrum?
Any help is greatly appreciated, especially if folks from Netgear monitor this forum. At the end of my rope and about to call it quits with Netgear unless as a company, they are willing to help me stand behind THEIR product!
