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CM700 Slow Download speeds
Hi, I have had a Netgear CM400 for several years. I upgraded my modem from CM400 to CM700 as my CM400 is older and occasionally resets/drops signal. My speed test of the CM400 prior to switching was...
Have the ISP check the signal and line quality UP to the modem.
Be sure there are not coax cable line splitters in the between the modem and ISP service box.
Be sure your using good quality RG6 coax cable up to the modem.FYI, the CM700 is a puma chip set modem, has a known problem;
The CM1000,1100, and 1200 are broadcome based modems that you might concider over the CM700.
Thanks for the heads up on the CM700 chip set issues. Update. I decided to take the CM700 back and upgraded to a CM1000. I checked the CM400 before the swap today and was at 120mbs, when the CM1000 was connected, the speed read 33mbs again, the same as the three other previous new modems I tried to connect. I had the Xfinity tech re-enable the CM400 again until they can send a technician out to check the line coming to the house after this whole Covid thing settles down. I am reading 120mbs again with the CM400. The only thing I can think of is that there is something to do with the Coax line and the newer modems… it’s odd that I’m limited to 1/3rd of the speed I should be getting when using the newer modems, but the older modem works fine (for speed anyway). It still power cycles about 1x to 2x per day. The COAX input post is a little shorter on the CM400 than any of the other new modems I’ve tried … could the wire not be seating deep enough? I’ve tried a couple different cables, with the same result and plugging the modem directly to the line outside of the house so that there are no splitters with the same result.
Have the tech check everying when they get there.