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nighthawk c7100v
I'm having problems with upstream bonded channels. Locked ATDMA 3 5120 Ksym/sec 29200000 Hz 57.0 dBmV locked atdma 3 5120 Ksym/sec 29200000Hz 57.0dBmV can get only one locked chann...
Would suggest you talk with Comcast support. They control the cable side which is what you are talking about.
You might get better and quicker replies, and find other answers, over in the appropriate section for your device. That's probably here:
Cable Modems & Routers