Comcast Founded: 1983 Headquarters: One Comcast Center, Philadelphia, PA 19103 Employees: 10,000+ Customer Service: 1 (800) 934-6489 Website: Go to Website Wikipedia: Go to Wikipedia Facebook: Go to Facebook Pay only $15/mo for 1 GB of shared data with our By the Gig data option. Download speed and upload speed are important factors when choosing the right cable modem for your needs. You're only supposed to have 1 channel per stream. The upstream channels, however, only half of them lock (channels 1-4). I'm experiencing extremely slow upstream speed from my local server (using Comcast business class internet) to server in either Montreal, Canada or Terre Haute, Indiana. Only 1 upstream channel - and power out of spec but "all fine on our end, no engineer for you" ‎24-04-2020 17:51 - edited ‎24-04-2020 17:55 Just got off the phone with the call center, factory reset Super Hub and still only the one upstream channel, and 20 Mbps up instead of … Port ID Frequency (MHz) Modulation Signal strength (dBmV) Channel ID Signal noise ratio (dB) 1 693000000 256QAM 4.700 47 40.946 2 363000000 256QAM 1.200 10 40.946 3 369000000 256QAM 1.500 11 40.946 4 375000000 Channel Lock Status Modulation Channel ID Frequency Power SNR / MER Unerrored Codewords Correctable Codewords Uncorrectable Codewords 1 Locked QAM256 28 537000000 Hz 3.0 dBmV 39.1 dB 3152131365 0 0 Comcast NBCUniversal creates incredible technology and entertainment that connects millions of people to the moments and experiences that matter most. So not only are they asking the CM1150V do do something it was never designed to do, they are blatantly violating the DOCSIS 3.1 … In a theorhetical sense, each upstream channel is capable of providing around 30Mbps. After upgrading to the DPC3008, I have only 1 downstream channel and 1 upstream channel. I noticed that it only has four of the 8 upstream channels bonded. When i run a spees test I'm seeing 120d/6u. Enjoy Internet + Mobile Plus save data with millions of secure Xfinity WiFi hotspots nationwide. And it is not his job to do so. DOCSIS 3.1 supports a downstream throughput with 4096-QAM and 25 kHz subcarrier spacing of up to 1.89 Gbit/s per 192 MHz OFDM channel. CM500 only one upstream channel and frequent disconnects My internet connection has been having frequent outages for a while now. As capacity increases, the 4th one might come online. Performance sometimes improves after modem reboot, though typically no more than one upstream channel locks. My internet works fine, and my speed matches my tier Solved! Upstream speed is only around 50KBps-70KBps. Are you That can cause random disconnects, spontaneous re-booting of the modem, speed, packet loss, latency problems, and the unbonding of the multiple bonded With two, your max upload capability would be around 60Mbps (rounding down), which probably far exceeds your tier. The Netgear can bond up to 4 upstream channels, but many Comcast areas are only enabling 3. Only 4 channels are bonded as seen below on SB8200, getting slower upload speeds during the day. To illustrate, D3 spectrum spans 108 MHz – 1.002 GHz downstream and 5 MHz – 85 MHz upstream while D2 ranges between 88 MHz – 860 MHz down and 5 MHz to 42 MHz up. Does Comcast use Docsis 3.1 for upstream? This can't be true. I'm having some ongoing issues with my modem requiring frequent resets. I know there is one solution on the Comcast forums. 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