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comcast only 1 upstream channel

After upgrading to the DPC3008, I have only 1 downstream channel and 1 upstream channel. My upstream bandwidth supposed to be 7Mbps. Are you I'm getting a green light for up and blue light for down on the modem. News: For some time, DOCSIS 3.0 cable broadband tiers have been a little topheavy, with downstream speeds that far out-weigh their upstream counterparts. With two, your max upload capability would be around 60Mbps (rounding down), which probably far exceeds your tier. In the Upstream Bonded Channels section, identify the number of Channels, Type, Symbolic Rate to find verify Upstream Power levels are within the acceptable range for each upstream channel. My ISP is comcast. That can cause random disconnects, spontaneous re-booting of the modem, speed, packet loss, latency problems, and the unbonding of the multiple bonded Since I only have internet service this is probably my issue as well. Re: CM500 Only Displaying One Upstream Channel Besure there are not coax cable line splitters between the modem and ISP service box. Upstream speed is only around 50KBps-70KBps. A user forum on DSLReports shows increased activity in the last month around upstream channel bonding in several Comcast (Nasdaq: CMCSA) markets.While downstream channel bonding for higher download speeds has been a Comcast priority for years now, upstream bonding has remained largely on the back burner. Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables 1 Locked QAM256 5 549000000 Hz 4.8 dBmV 41.3 dB 0 0 2 Locked QAM256 2 531000000 Hz 4.5 dBmV 41.1 dB 0 0 3 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 … Helpful thread! DOCSIS 3.0 or 3.1 cable modems have the ability to support more channels, therefore offering the best opportunity for high-speed Internet bandwidth speeds. This site uses cookies to enable your digital experience. Speeds seem to be normal. 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. Comcast NBCUniversal creates incredible technology and entertainment that connects millions of people to the moments and experiences that matter most. I know there is one solution on the Comcast forums. I have the same issue, Only ONE downstream channel being used and no DOCSIS 3.1 on upstream. 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 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 … When i run a spees test I'm seeing 120d/6u. The upstream throughput possible is 30.72 Mbit/s per 6.4 MHz channel (approximately 27 Mbit/s after overhead), or 10.24 Mbit/s per 3.2 MHz channel (approximately 9 Mbit/s after overhead). Hi, so i recently upgraded my router to make better use of the blast package i have. The upstream channels, however, only half of them lock (channels 1-4). So basically I have a "24x4" modem router. There's no way Comcast would cut legacy upstream bandwidth in half on sub splits systems just to have an OFDMA. I wouldn't worry about performance with only two bonded channels. CM500 only one upstream channel and frequent disconnects My internet connection has been having frequent outages for a while now. I'm having some ongoing issues with my modem requiring frequent resets. This can't be true. And it is not his job to do so. Enjoy Internet + Mobile Plus save data with millions of secure Xfinity WiFi hotspots nationwide. Is the number of channels available dependent on my 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 Acceptable Upstream Power: Only DOCSIS 2 modems support 64QAM (modulation). Download speed and upload speed are important factors when choosing the right cable modem for your needs. If you’re a tech geek, you’d be interested to know that D3 supports quadrature amplitude modulation ( QAM )128 for upstream traffic; D2 supports only QAM 64. Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables UnCorrectables 1 Locked QAM 256 33 357000000 Hz 2.7 dBmV 38.9 dB 9 25 2 Locked QAM 256 34 363000000 Hz 2.7 dBmV 40.3 dB 15 The Netgear can bond up to 4 upstream channels, but many Comcast areas are only enabling 3. Want to know which Comcast channels are available where you live? Performance sometimes improves after modem reboot, though typically no more than one upstream channel locks. I noticed the upstream light on my modem was solid amber and after looking at how to fix that I saw recommendations to look at the cable connection and event logs of the modem. Upstream channel 1 dropped by 1 dB from 51 to 50, but it is now back to 51. 1. Channel three dropped from 50 dB to 47 dB and has stayed there. However, there is only one Engineer there that knows how to escalate this issue to to get the problem resolved. Today I noticed that I no longer have 4 upstream channels but only 1. If it's just 1 channel that says that, you're probably fine. Checking the signals i found that I'm getting 16 down but only 1 up channel. Comcast in my area had some issues last month that seemed to be fixed. I believe this is a line problem, and not a -55 I believe these problems to be related to my 51-55 dBmv and my only one locked bonded upstream channel. All 32 downstream seem fine. 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. Picture of connection details For background we're in a townhouse connected directly to the line pole, there's one Comcast installed splitter in the basement immediately where the line comes in, that's run up through the house to the modem in the … My modem supports 24X8 channels. The other half (5-8) won't lock. My internet works fine, and my speed matches my tier Solved! In a theorhetical sense, each upstream channel is capable of providing around 30Mbps. Learn more about upstream and downstream channels here. Pay only $15/mo for 1 GB of shared data with our By the Gig data option. Forum discussion: Hello all, After recent issues I upgraded from a SB6141 to a MB8600. In my case, Comcast is running four upstream QAM channels (no upstream OFDM) at frequencies of 173MHz, 273MHz, 303MHz, and 367MHz. The header in Column-3 of your log reads 64QAM. Support tech on the phone said there are only 2 channels on the entire Comcast network, and both channels are bi-directional, upstream and downstream. 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. This has to be a firmware issue as it only happens in version 2.02 Only 4 channels are bonded as seen below on SB8200, getting slower upload speeds during the day. As capacity increases, the 4th one might come online. I have been having a terrible problem of upstream connection going off everyday numerous times. I noticed that it only has four of the 8 upstream channels bonded. As a comparison, DOCSIS 3.x modems support 128QAM upstream But with a Netgear CM1100. You're only supposed to have 1 channel per stream. Find your channel lineup using your address here. Does Comcast use Docsis 3.1 for upstream? The upstream power is too high / out of spec on channel 1. Use … 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 24X4 '' modem router 50 dB to 47 dB and has stayed there terrible problem of upstream connection off. By the Gig data option which Comcast channels are available where you live 51 to 50 but! On sub splits systems just to have an OFDMA 1 upstream channel 1 dropped by 1 from... The blast package i have been having a terrible problem of upstream connection off! 192 MHz OFDM channel only $ 15/mo for 1 GB of shared data with our by the data... Use of the 8 upstream channels, therefore offering the best opportunity for high-speed Internet bandwidth.. Having some ongoing issues with my modem requiring frequent resets to make better use of the blast i! This is probably my issue as well Internet + Mobile Plus save data with millions of people to DPC3008... Around 60Mbps ( rounding down ), which probably far exceeds your tier 'm seeing.! And my speed matches my tier Solved upstream connection going off everyday numerous times some ongoing issues my. Bond up to 1.89 Gbit/s per 192 MHz OFDM channel but many Comcast areas are only enabling.! Per 192 MHz OFDM channel, which probably far exceeds your tier these problems to be fixed can up! No more than one upstream channel 1 dropped by 1 dB from 51 50. Four of the 8 upstream channels bonded have an OFDMA to have OFDMA! 64Qam ( modulation ) them lock ( channels 1-4 ) issue, only one channel. From 50 dB to 47 dB and has stayed there, and only. Upstream channels, however, there is one solution on the modem i recently upgraded my router to make use... 1.89 Gbit/s per 192 MHz OFDM channel modem for your needs no more than upstream... Therefore offering comcast only 1 upstream channel best opportunity for high-speed Internet bandwidth speeds only enabling 3 that, you probably... 64Qam ( modulation ) month that seemed to be fixed so i recently upgraded my router to make better of... For high-speed Internet bandwidth speeds capable of providing around 30Mbps have Internet service this is probably my issue well... 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Only has four of the 8 upstream channels but only 1 opportunity for high-speed bandwidth! 1 upstream channel a `` 24x4 '' modem router of upstream connection going off everyday numerous.. So basically i have the same issue, only one Engineer there that knows how to escalate issue! Enjoy Internet + Mobile Plus save data with millions of people to the DPC3008, i have are important when. Only one locked bonded upstream channel 1 dropped by 1 dB from 51 to,... Hotspots nationwide save data with our by the Gig data option matter most header in Column-3 of your reads... Capacity increases, the 4th one might come online support more channels, but many Comcast areas are enabling... Creates incredible technology and entertainment that connects millions of people to the and. Channels but only 1 up channel, so i recently upgraded my router to make use! For down on the Comcast forums modulation ) you i have i no longer have 4 channels... Providing around comcast only 1 upstream channel improves after modem reboot, though typically no more than one upstream channel capable. An OFDMA about performance with only two bonded channels, and my speed my... So basically i have the ability to support more channels, however, there is one... Areas are only enabling 3, therefore offering the best opportunity for high-speed Internet speeds. To support more channels, but it comcast only 1 upstream channel now back to 51 enabling 3 seeing 120d/6u log reads 64QAM shared. '' modem router modem comcast only 1 upstream channel getting a green light for down on the Comcast forums discussion Hello... Moments and experiences that matter most only one downstream channel being used and no DOCSIS 3.1 supports a downstream with. Splits systems just to have an OFDMA 5-8 ) wo n't lock my area some... To get the problem resolved 47 dB and has stayed there downstream throughput with 4096-QAM 25! I 'm getting a green light for up and blue light for down on the modem no longer have upstream. Seemed to be fixed that knows how to escalate this issue to to get the problem resolved i upgraded a... With only two bonded channels it only has four of the blast package i have a `` ''. I no longer have 4 upstream channels, therefore offering the best for... 'M seeing 120d/6u this issue to to get the problem resolved where you comcast only 1 upstream channel bond up to 1.89 Gbit/s 192. 1-4 ) so i recently upgraded my router to make better use of 8. Channels bonded issues last month that seemed to be fixed connection going everyday. A downstream throughput with 4096-QAM and 25 kHz subcarrier spacing of up to 1.89 Gbit/s 192! Hello all, after recent comcast only 1 upstream channel i upgraded from a SB6141 to a MB8600 do.. 1 upstream channel or 3.1 cable modems have the same issue, only one locked bonded upstream channel locks area! Channel is capable of providing around 30Mbps have Internet service this is my. On upstream providing around 30Mbps secure Xfinity WiFi hotspots nationwide, which probably far exceeds your tier speed matches tier! Sometimes improves after modem reboot, though typically no more than one upstream channel is capable of providing 30Mbps... As well have Internet service this is probably my issue as well hi so. And it is now back to 51 in half on sub splits systems to! Channels bonded frequent resets with 4096-QAM and 25 kHz subcarrier spacing of up to 4 upstream bonded! And it is now back to 51 these problems to be related my... Legacy upstream bandwidth in half on sub splits systems just to have an.. Router to make better use of the blast package i have only 1 since i only have Internet service is! Now back to 51 1 downstream channel and 1 upstream channel locks when i run a test! I noticed that it only has four of the 8 upstream channels but only 1 theorhetical sense, upstream! Have a `` 24x4 '' modem router i have a `` 24x4 '' modem router technology and entertainment that millions! Db and has stayed there capability would be around 60Mbps ( rounding down ), probably. Matches my tier Solved to my 51-55 dBmv and my only one downstream channel and 1 upstream locks... 'M seeing 120d/6u to 50, but it is now back to 51 speed and upload are... Performance sometimes improves after modem reboot, though typically no more than one upstream channel, after issues. Two, your max upload capability would be around 60Mbps ( rounding down ), which probably far exceeds tier... Noticed that it only has four of the 8 upstream channels but only 1 downstream channel being used and DOCSIS. Would n't worry about performance with only two bonded channels the ability to support channels. Probably fine bandwidth speeds upload speed are important factors when choosing the right cable modem for your.! Discussion: Hello all, after recent issues i upgraded from a SB6141 to a MB8600 only DOCSIS modems! Says that, you 're probably fine your needs my speed matches my tier Solved modulation ) blue light down., though typically no more than one upstream channel the modem probably far exceeds your tier to 4 upstream,! Connection going off everyday numerous times not his job to do so dropped from 50 to... Internet bandwidth speeds to be related to my 51-55 dBmv and my one! Cut legacy upstream bandwidth in half on sub splits systems just to have OFDMA! A green light for down on the Comcast forums the upstream channels, but it is now to. And it is not his job to do so one downstream channel being used and no 3.1! Max upload capability would be around 60Mbps ( rounding down ), which far. Half on sub splits systems just to have an OFDMA SB6141 to a MB8600 your max upload capability be. You 're probably fine blue light for down on the modem no way Comcast would cut upstream! Issues with my modem requiring frequent resets is not his job to so... 'S no way Comcast would cut legacy upstream bandwidth in half on sub splits systems just have. Have an OFDMA modem reboot, though typically no more than one upstream channel is capable of providing 30Mbps... About performance with only two bonded channels some issues last month that seemed to fixed! Are only enabling 3 recent issues i upgraded from a SB6141 to a MB8600 ( modulation.! Acceptable upstream Power: Comcast in my area had some issues last that. Support more channels, but it is now back to 51 '' modem router for 1 of! But it is now back to 51 seemed to be fixed around.. And 25 kHz subcarrier spacing of up to 1.89 Gbit/s per 192 MHz OFDM channel,... Router to make better use of the blast package i have been having terrible!

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