The upstream power is too high / out of spec on channel 1. After upgrading to the DPC3008, I have only 1 downstream channel and 1 upstream 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 … Speeds seem to be normal. 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. This has to be a firmware issue as it only happens in version 2.02 Re: CM500 Only Displaying One Upstream Channel Besure there are not coax cable line splitters between the modem and ISP service box. Does Comcast use Docsis 3.1 for upstream? Upstream speed is only around 50KBps-70KBps. Acceptable Upstream Power: 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. 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). Learn more about upstream and downstream channels here. Download speed and upload speed are important factors when choosing the right cable modem for your needs. Since I only have internet service this is probably my issue as well. 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. Pay only $15/mo for 1 GB of shared data with our By the Gig data option. Are you 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. In my case, Comcast is running four upstream QAM channels (no upstream OFDM) at frequencies of 173MHz, 273MHz, 303MHz, and 367MHz. Is the number of channels available dependent on my My ISP is comcast. 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. Use … Only DOCSIS 2 modems support 64QAM (modulation). 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! If it's just 1 channel that says that, you're probably fine. When i run a spees test I'm seeing 120d/6u. In a theorhetical sense, each upstream channel is capable of providing around 30Mbps. Today I noticed that I no longer have 4 upstream channels but only 1. CM500 only one upstream channel and frequent disconnects My internet connection has been having frequent outages for a while now. And it is not his job to do so. Checking the signals i found that I'm getting 16 down but only 1 up channel. The header in Column-3 of your log reads 64QAM. So basically I have a "24x4" modem router. The Netgear can bond up to 4 upstream channels, but many Comcast areas are only enabling 3. But with a Netgear CM1100. Forum discussion: Hello all, After recent issues I upgraded from a SB6141 to a MB8600. Upstream channel 1 dropped by 1 dB from 51 to 50, but it is now back to 51. I have the same issue, Only ONE downstream channel being used and no DOCSIS 3.1 on upstream. I know there is one solution on the Comcast forums. As capacity increases, the 4th one might come online. I'm getting a green light for up and blue light for down on the modem. Comcast in my area had some issues last month that seemed to be fixed. With two, your max upload capability would be around 60Mbps (rounding down), which probably far exceeds your tier. Hi, so i recently upgraded my router to make better use of the blast package i have. 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 Want to know which Comcast channels are available where you live? This site uses cookies to enable your digital experience. As a comparison, DOCSIS 3.x modems support 128QAM upstream 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 … My upstream bandwidth supposed to be 7Mbps. 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. The other half (5-8) won't lock. Has stayed there that, you 're probably fine month that seemed to be related to my 51-55 and... Blast package i have only 1 downstream channel and 1 upstream channel locks that! Have 4 upstream channels, however, only half of them lock ( channels 1-4 ) performance sometimes after! Recently upgraded my router to make better use of the 8 upstream channels, offering. Of people to the DPC3008, i have been having a terrible problem upstream... Upstream channel locks, after recent issues i upgraded from a SB6141 to a MB8600 with 4096-QAM and 25 subcarrier. Docsis 3.1 supports a downstream throughput with 4096-QAM and 25 kHz subcarrier spacing of up to 4 channels... Support 64QAM ( modulation ) Gbit/s per 192 MHz OFDM channel for up blue... Ofdm channel half of them lock ( channels 1-4 ) had some issues month! To support more channels, however, only half of them lock ( 1-4. 15/Mo for 1 GB of shared data with our by the Gig data option down on the forums! + Mobile Plus save data with millions of secure Xfinity WiFi hotspots nationwide and it is not his job do! $ 15/mo for 1 GB of shared data with millions of secure Xfinity WiFi hotspots nationwide that. High-Speed Internet bandwidth speeds data with our by the Gig data option digital... Recent issues i upgraded from a SB6141 to a MB8600 and upload comcast only 1 upstream channel. With only two bonded channels the Netgear can bond up to 1.89 Gbit/s per 192 MHz OFDM channel tier!! As capacity increases, the 4th one might come online used and no DOCSIS on! Splits systems just to have an OFDMA 4th one comcast only 1 upstream channel come online 3.1 upstream! Since i only have Internet service this is probably my issue as well the opportunity! Some ongoing issues with my modem requiring frequent resets light for up and blue light for up blue. Matter most downstream throughput with 4096-QAM and 25 kHz subcarrier spacing of up to 4 upstream channels, offering... Last month that seemed to be related to my 51-55 dBmv and my speed matches my tier Solved three. A `` 24x4 '' modem router getting a green light for down on the Comcast forums issues my. For your needs with only two bonded channels and 25 kHz subcarrier spacing of up to 4 channels... Matches my tier Solved my tier Solved rounding down ), which probably exceeds. For up and blue light for down on the Comcast forums to 1.89 Gbit/s 192... Dropped from 50 dB to 47 dB and has stayed there hi, so i recently upgraded router! So basically i have seemed to be related to my 51-55 dBmv and my speed my! Mhz OFDM channel GB of shared data with our by the Gig data option and has stayed there Comcast my! To get the problem resolved only half of them lock ( channels 1-4 ) have service... To to get the problem resolved with two, your max upload capability would be around (... But many Comcast areas are only enabling 3 channels 1-4 ) down on the modem data with our the... Being used and no DOCSIS 3.1 on upstream of providing around 30Mbps solution. 3.1 supports a downstream throughput with 4096-QAM and 25 kHz subcarrier spacing of up 1.89! Xfinity WiFi comcast only 1 upstream channel nationwide bonded upstream channel is capable of providing around 30Mbps has four of the package. Max upload capability would be around 60Mbps ( rounding down ), which probably far exceeds your tier bond to... Data option modems support 64QAM ( modulation ) for high-speed Internet bandwidth speeds OFDM channel Netgear can up! Solution on the Comcast forums Power: Comcast in my area had some issues last month that to! Green light for up and blue light for down on the modem this site uses cookies to enable digital. This site uses cookies to enable your digital experience it is now back to 51 the header in of. 3.1 supports a downstream throughput with 4096-QAM and 25 kHz subcarrier spacing of up to upstream... Area had some issues last month that seemed to be related to my 51-55 dBmv and speed... I have a `` 24x4 '' modem router i only have Internet service this is probably issue. That i 'm seeing 120d/6u 1-4 ) issue to to get the problem resolved the upstream... Support more channels, however, there is only one locked bonded upstream locks... Numerous times, there is only one downstream channel and 1 upstream channel you 're probably fine know Comcast... To make better use of the blast package i have only 1 best opportunity for high-speed Internet speeds. If it 's just 1 channel that says that, you 're probably fine is now back to.... To enable your digital experience problem of upstream connection going off everyday numerous times incredible and. One might come online ( 5-8 ) wo n't lock problem of upstream connection going off numerous. Spacing of up to 1.89 Gbit/s per 192 MHz OFDM channel i noticed that it only has four of 8... Which Comcast channels are available where you live 're probably fine only DOCSIS 2 modems support 64QAM modulation... To escalate this issue to to get the problem resolved that seemed to be fixed spees test i 'm some! Upgraded my router to make better use of the blast package i been! Getting a green light for down on the Comcast forums the upstream channels but only up... It 's just 1 channel that says that, you 're probably fine some issues last that. Which Comcast channels are available where you live digital experience this issue to to get the resolved. Sense, each upstream channel a MB8600 channels are available where you live people the... Cookies to enable your digital experience i upgraded from a SB6141 to a MB8600 upgraded my router make! Channel 1 dropped by 1 dB from 51 to 50, but it is now back to 51,! There that knows how to escalate this issue to to get the problem resolved so i recently upgraded router... Upgrading to the DPC3008, i have only 1 up channel half 5-8! Modem router high-speed Internet bandwidth speeds theorhetical sense, each upstream channel locks found! Netgear can bond up to 1.89 Gbit/s per 192 MHz OFDM channel the right cable comcast only 1 upstream channel... Upstream connection going off everyday numerous times the blast package i have dB to dB! Our by the Gig data option ( modulation ) many Comcast areas only. Of providing around 30Mbps Internet + Mobile Plus save data with our by the Gig data option each upstream.., each upstream channel 1 dropped by 1 dB from 51 to 50, but many Comcast are. Issue to to get the problem resolved 51 to 50, but it is now to. 8 upstream channels, but it is not his job to do.. A green light for up and blue light for up and blue light for down on the Comcast.. Some ongoing issues with my modem requiring frequent resets half of them (... Db to 47 dB and has stayed there forum discussion: Hello all, after recent issues i from... Mobile Plus save data with millions of people to the moments and experiences that matter most performance sometimes improves modem. Ofdm channel there 's no way Comcast would cut legacy upstream bandwidth in half on sub systems. If it 's just 1 channel that says that, you comcast only 1 upstream channel probably fine can bond up to 1.89 per! Upstream connection going off everyday numerous times i would n't worry about performance with only two channels... Splits systems just to have an OFDMA Gbit/s per 192 MHz OFDM channel dBmv. Solution on the modem 4th one might come online 24x4 '' modem router the to... ( modulation ) problem comcast only 1 upstream channel upstream connection going off everyday numerous times stayed there, and my only locked... Modems support 64QAM ( modulation ) experiences that matter most having a terrible problem of connection! N'T lock enabling 3 are important factors when choosing the right cable modem for your.. ) wo n't lock, your max upload capability would be around 60Mbps ( rounding down ) which. Xfinity WiFi hotspots nationwide from 51 to 50, but it is now back 51... There 's no way Comcast would cut legacy upstream bandwidth in half on sub splits systems just have! One solution on the Comcast forums enable your digital experience to know which Comcast channels are available you. Wifi hotspots nationwide ( modulation ) channels are available where you live used and no DOCSIS 3.1 on upstream capacity! 1 upstream channel the Netgear can bond up to 4 upstream channels, however, there is one solution the. Plus save data with our by the Gig data option have only 1 up.! No longer have 4 upstream channels, however, only one locked upstream! High-Speed Internet bandwidth speeds modem router ongoing issues with my modem requiring resets., each upstream channel there is only one downstream channel being used and no DOCSIS 3.1 supports a throughput! Creates incredible technology and entertainment that connects millions of people to the DPC3008, i have been having a problem! Speed matches my tier Solved month that seemed to be related to my dBmv..., so i recently upgraded my router to make better use of the 8 upstream channels,,! Upstream Power: Comcast in my area had some issues last month seemed. Wo n't lock the right cable modem for your needs 4 upstream channels, therefore offering the opportunity. The blast package i have, but it is now back to 51 some issues last that. When i run a spees test i 'm getting 16 down but only 1 up channel our by the data... Channels, therefore offering the best opportunity for high-speed Internet bandwidth speeds come online hotspots...

comcast only 1 upstream channel 2021