·Time Warner Cable
As jimk pointed out you have upstream bonding, with an ATDMA 5120 wide upstream channel even which needs an SNR of 30 or else it could cause random dropouts or other issues. The only way to read that SNR of the upstream channels are at the CMTS and even then its an average. Ever ask to talk to Tier 3? Although they can only do so much they are far better then Roadrunner National Help Desk, which on occasional has made me say ugh.