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CAX30 Poor Downstream Connection / Partial help
I've had this CAX30 router/modem for about 10-11months. Pro installed by Cox (1gig) I had issues with stability in the past, but it seemed fine for months and now all of a suden back to stability...
Just took a second look at your latest cable data. It appears Cox has enabled mid-split in your area. I can see your OFDM channel 2 is running at 918 MHz and the power level is way below specification. There is a good chance Cox did that in the past year.
Whether you only use one connection or not, there could be a splitter in your coax connection. Many old splitters are rated for 5-860 MHz and cause a significant signal loss above that frequency range. The splitter needs to be replaced.
Your power levels are still way out of spec.
All the channels would be within 3.5dbmv of each other. And for optimal speeds, they should be from -7.5dbmv to 7.5dbmv. You're wayout out side of the power window and your channels are way further apart than 3.5.
the reason your still getting speeds with be the ofdma channels. They allow the higher throughput. But when there's issues/congestions on those channels, it uses the standard channels. And I"m betting you have issues of the ofdma channels as well but we don't have as much to compare with.
So while your speeds are back, its probably not going to stay stable
Appreciate this info! Makes sense to me.
So I had this installed by a Cox tech less than a year ago, and I haven't moved anything/changed anything wires wise that they put in place. I actually don't use cable for TV, so I have no boxes or any other devices using the signal. If I call Cox to have them fix this --- are they going to try to charge me? I'm assuming yes?
I rent my place, so I can't really do too much myself as the wires/connections are only partly accessible by me. I just am not sure what I can really do other than have them get involved - but I don't see why I should be on the hook for it as I didn't set it up - and it seems they "Got me connected" and said good enough.
Oiiii
Thanks again you guys! Will followup. -DD
Being in a rental situation, there are limits as to what you can access and check. Are you in a single family unit or do you have some close neighbors that could be experiencing the same issues?
You still pay Cox a monthly fee to deliver a service. A lot of things can change/deteriorate in a year that are the responsibility of Cox and you are the only one being affected. It is not unusual to have to push a service provider to deliver reliable consistent service. If you do not push, no one else will and they are happy to collect the monthly fee and go on down the road.
Here is a link to some details that might help you. Clearly some do not apply. Look for the details that may resolve your issue.
https://www.duckware.com/tech/solving-intermittent-cable-modem-issues.html
Agree with plemans, your power levels are still a long way out of specification.
Just took a second look at your latest cable data. It appears Cox has enabled mid-split in your area. I can see your OFDM channel 2 is running at 918 MHz and the power level is way below specification. There is a good chance Cox did that in the past year.
Whether you only use one connection or not, there could be a splitter in your coax connection. Many old splitters are rated for 5-860 MHz and cause a significant signal loss above that frequency range. The splitter needs to be replaced.