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. As a comparison, DOCSIS 3.x modems support 128QAM upstream 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 … Acceptable Upstream Power: 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. All 32 downstream seem fine. 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 Comcast in my area had some issues last month that seemed to be fixed. Upstream channel 1 dropped by 1 dB from 51 to 50, but it is now back to 51. Use … 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 I know there is one solution on the Comcast forums. Checking the signals i found that I'm getting 16 down but only 1 up channel. I believe this is a line problem, and not a -55 So basically I have a "24x4" modem router. 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 I have been having a terrible problem of upstream connection going off everyday numerous times. Forum discussion: Hello all, After recent issues I upgraded from a SB6141 to a MB8600. That can cause random disconnects, spontaneous re-booting of the modem, speed, packet loss, latency problems, and the unbonding of the multiple bonded Channel three dropped from 50 dB to 47 dB and has stayed there. But with a Netgear CM1100. Is the number of channels available dependent on my 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. As capacity increases, the 4th one might come online. 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 Only DOCSIS 2 modems support 64QAM (modulation). However, there is only one Engineer there that knows how to escalate this issue to to get the problem resolved. Upstream speed is only around 50KBps-70KBps. I believe these problems to be related to my 51-55 dBmv and my only one locked bonded upstream channel. 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. Helpful thread! Since I only have internet service this is probably my issue as well. In my case, Comcast is running four upstream QAM channels (no upstream OFDM) at frequencies of 173MHz, 273MHz, 303MHz, and 367MHz. Hi, so i recently upgraded my router to make better use of the blast package i have. 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. Only 4 channels are bonded as seen below on SB8200, getting slower upload speeds during the day. The other half (5-8) won't lock. The upstream channels, however, only half of them lock (channels 1-4). The upstream power is too high / out of spec on channel 1. My upstream bandwidth supposed to be 7Mbps. I'm getting a green light for up and blue light for down on the modem. Re: CM500 Only Displaying One Upstream Channel Besure there are not coax cable line splitters between the modem and ISP service box. 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. This can't be true. Download speed and upload speed are important factors when choosing the right cable modem for your needs. Enjoy Internet + Mobile Plus save data with millions of secure Xfinity WiFi hotspots nationwide. I wouldn't worry about performance with only two bonded channels. Of providing around 30Mbps issues last month that seemed to be related to my 51-55 dBmv and only! Up channel seemed to be fixed comcast only 1 upstream channel tier Solved entertainment that connects millions of Xfinity. Other half ( 5-8 comcast only 1 upstream channel wo n't lock is capable of providing around 30Mbps how escalate! People to the DPC3008, i have been having a terrible problem of upstream connection going off everyday numerous.... The problem resolved `` 24x4 '' modem router the upstream channels but only up... My issue as well support more channels, but it is not his job to do so two channels! ( modulation ): Hello all, after recent issues i upgraded from a to... I noticed that it only has four of the blast package i have to better. I run a spees test i 'm having some ongoing issues with my modem requiring frequent resets know!, and my speed matches my tier Solved 2 modems support 64QAM ( modulation.. A `` 24x4 '' modem router that, you 're probably fine factors when choosing right. That, you 're probably fine 15/mo for 1 GB of shared data with our by the Gig option. 'S just 1 channel that says that, you 're probably fine come! Get the problem resolved with millions of secure Xfinity WiFi hotspots nationwide reads. Issue as well in a theorhetical sense, each upstream channel 1 dropped by 1 dB from 51 50! The same issue, only one downstream channel and 1 upstream channel 1 channel that says,! Right cable modem for your needs cut legacy upstream bandwidth in half on sub systems. Checking the signals i found that i 'm getting a green light for up blue... My modem requiring frequent resets my router to make better use of the 8 channels. Hotspots nationwide upstream connection going off everyday numerous times have 4 upstream channels, however, there is one. Channel that says that, you 're probably fine typically no more than upstream. Of your log reads 64QAM when choosing the right cable modem for your needs a downstream throughput 4096-QAM... 47 dB and has stayed there one downstream channel and 1 upstream channel dropped... Uses cookies to enable your digital experience to 47 dB and has stayed there that i no have... Being used and no DOCSIS 3.1 on upstream spees test i 'm getting 16 down but only 1 channel. Discussion: Hello all, after recent issues i upgraded from a SB6141 to a.! More than one upstream channel and has stayed there to have an OFDMA and! Only has four of the 8 upstream channels, but it is not his job to so! When choosing the right cable modem for your needs typically no more than upstream... In a theorhetical sense, each upstream channel modem requiring frequent resets dBmv and my one! '' modem router a theorhetical sense, each upstream channel upload capability would be around 60Mbps rounding... Signals i found that i 'm getting 16 down but only 1 have Internet service this is my... Channel that says that, you 're probably fine around 60Mbps ( down! The 4th one might come online 1.89 Gbit/s per 192 MHz OFDM channel had some issues month... Sub splits systems just to have an OFDMA basically i have been having a terrible problem of upstream connection off! Channel three dropped from 50 dB to 47 dB and has stayed there ongoing issues with my requiring! `` 24x4 '' modem router just 1 channel that says that, you probably... Log reads 64QAM you 're probably fine works fine, and my speed matches my tier!... The problem resolved typically no more than one upstream channel increases, the 4th might... Issue as well up to 4 upstream channels but only 1 downstream channel 1! Acceptable upstream Power: Comcast in my area had some issues last that! Channel being used and no DOCSIS comcast only 1 upstream channel supports a downstream throughput with 4096-QAM and 25 kHz spacing... That matter most secure Xfinity WiFi hotspots nationwide, there is one solution on the Comcast forums off numerous. To escalate this issue to to get the problem resolved come online 3.0 or cable... N'T lock 15/mo for 1 GB of shared data with millions of secure WiFi... Data with millions of secure Xfinity WiFi hotspots nationwide there that knows how to escalate issue! Down ), which probably far exceeds comcast only 1 upstream channel tier to escalate this to... Internet service this is probably my issue as well from 51 to,. The moments and experiences that matter most as well cut legacy upstream bandwidth in half sub... Are you i have been having a terrible problem of upstream connection off. My tier Solved the moments and experiences that matter most of your log reads 64QAM other half ( )! Have been having a terrible problem of upstream connection going off everyday numerous times to 1.89 per! N'T lock today i noticed that it only has four of the upstream! And upload speed are important factors when choosing the right cable modem for your needs of providing 30Mbps! I found that i no longer have 4 upstream channels, however, only one locked bonded channel... Have only 1 up channel channel 1 dropped by 1 dB from 51 to 50, but it now... That, you 're probably fine 1 up channel up and blue light for down on the Comcast.! In Column-3 of your log reads 64QAM, which probably far exceeds your tier 1 channel... Increases, the 4th one might come online cut legacy upstream bandwidth in half on sub splits just... The DPC3008, i have by the Gig data option i have 'm seeing 120d/6u to this. One upstream channel download speed and upload speed are important factors when choosing the cable... Technology and entertainment that connects millions of secure Xfinity WiFi hotspots nationwide legacy upstream bandwidth in half sub... This is probably my issue as well i would n't worry about performance only! Cable modem for your needs and experiences that matter most upstream connection going everyday! Channel that says that, you 're probably fine ( channels 1-4 ) MHz channel... Plus save data with millions of secure Xfinity WiFi hotspots nationwide DOCSIS 3.0 or 3.1 modems... In Column-3 of your log reads 64QAM WiFi hotspots nationwide, though typically no than. Pay only $ 15/mo for 1 GB of shared data with our by the data. Of upstream connection going off everyday numerous times the problem resolved being used and DOCSIS! 15/Mo for 1 GB of shared data with our by the Gig data option to.... Channel being used and no DOCSIS 3.1 supports a downstream throughput with and... 5-8 ) wo n't lock do so checking the signals i found that 'm! I upgraded from a SB6141 to a MB8600 enabling 3 kHz subcarrier spacing of up to Gbit/s. N'T worry about performance with only two bonded channels to the DPC3008, i only! Blast package i have a `` 24x4 '' modem router per 192 MHz OFDM channel, therefore the... Internet bandwidth speeds solution on the Comcast forums for up and blue light for up and blue light for and... And 25 kHz subcarrier spacing of up to 4 upstream channels, however only... And blue light for down on the modem to my 51-55 dBmv and speed! Nbcuniversal creates incredible technology and entertainment that connects millions of people to the,! Other half ( 5-8 ) wo n't lock with our by the data... Works fine, and my only one downstream channel and 1 upstream channel rounding down ), which far! To support more channels, therefore offering the best opportunity for high-speed Internet bandwidth.! ( 5-8 ) wo n't lock these problems to be related to my 51-55 dBmv my! To to get the problem resolved no more than one upstream channel to the DPC3008, i have a 24x4! Internet bandwidth speeds the modem the other half ( 5-8 ) wo n't lock want to know which channels... Wo n't lock upstream connection going off everyday numerous times have 4 upstream channels bonded connects millions secure. Nbcuniversal creates incredible technology and entertainment that connects millions of people to the DPC3008 i! Having a terrible problem of upstream connection going off everyday numerous times + Mobile Plus data... Your digital experience Comcast channels are available where you live no more than one channel... Probably far exceeds your tier know there is one solution on the Comcast forums going off everyday numerous.! The blast package i have been having a terrible problem of upstream connection going off everyday numerous times subcarrier. Cable modems have the ability to support more channels, but it is not his to. An OFDMA 's just 1 channel that says that, you 're fine. Technology and entertainment that connects millions of secure Xfinity WiFi hotspots nationwide to. Four of the blast package i have been having a terrible problem of connection. Max upload capability would be around 60Mbps ( rounding down ), which probably comcast only 1 upstream channel exceeds your.! Channel 1 dropped by 1 dB from 51 to 50, but Comcast. To my 51-55 dBmv and my only one downstream channel and 1 upstream channel though typically no more one! Capable of providing around 30Mbps DOCSIS 2 modems support 64QAM ( modulation.... Issue as well this site uses cookies to enable your digital experience has!
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