I recently started using Elisa’s broadband cable internet subscription in my apartment. I have a Fritz!Box 6660 cable modem connected to TV/Data splitter/filter which is connected to a TV cable wall outlet. For a couple weeks now, the connection has been sub-optimal, so I started looking into what may be going wrong. After quite a bit of research, I came to the conclusion that my power level numbers are not at all where they should be for both Downstream and Upstream.
I’ve contacted Elisa customer support and they said that my numbers are in fact bad but my neighbors’ numbers are perfectly fine, so it must be an issue on my end. I told them I was using a different TV/Data splitter/filter than Elisa provides, so they suggested getting one directly from Elisa. Once I did that, I expected my power levels to go back to normal, but alas, they are exactly the same as with the other TV/Data splitter/filter.
I’ve also tried connecting the cable modem directly to the TV cable wall outlet without using any splitters/filters and, to my surprise, the power levels got better. I was noticing minimum power levels of -15.5 dBmV as opposed to -18.0 dBmV when using the splitter/filter, although the Upstream power levels stayed the same at 51 dBmV.
At this point I’ve tried 2 different TV/Data splitters/filters, 3 different coax cables and a direct outlet-to-modem connection.
I’ve attached screenshots of the power levels seen using Elisa’s own provided cable and TV/Data splitter/filter (correctable error counts are from ~45 mins of uptime). Any help is greatly appreciated!
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