I have been having problems with CL service on and off for a few months. A field tech finally narrowed down that my low SNR and high number of CRC errors and modem retrains is likely a problem with the wiring at my apartment complex. He said my modem was fine (C1000A) for a connection speed of 40 Mbps, and speed tests usually show me 37 Mbps, which is what I should expect. The instability is most likely a wiring issue.
Where I live, CL sends their service to the main office, then afterwards there are copper cables that go from the office to the individual buildings. So, connections for CL are made first in the office but then travel through these lines, and my building is 200 - 300 feet away. A repairperson with CL said he could tell the problem was not at the office because there was a strong SNR there (something like 20 db). He also tested the wiring in the building from the outside to my wall jack, and no issues there. After he swapped a copper line at the office that was available coming to my building, the SNR at my modem indicated an improvement (16 db). But what happened twice now is a couple weeks after the repair tech leaves I'm watching the SNR slip. Right now downstream SNR is only 6 dB. But the service is up and running.
So, the problem is possible degraded wiring. However, there are unused phone lines coming to this building. I was already swapped twice, and as I said the signal is good after a repairperson leaves but over time the SNR starts slipping, as it is now. Should I ask the phone line company to use two of these available phone lines to create a "bonded pair" so that hopefully the problem goes away, or is there more to creating a bonded pair than just using two phone lines instead of only one?
I can get the management here to call the phone line company again to make a change to my connection, but I doubt they'll agree to dig up the lines and install new wiring.
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