... Upstream Bonded Channels. That's a theoretical or lab-bench speed you'll never see in the real world. About a month ago, I went out and bought a Motorola SB 6120 DOCSIS 3 Modem. I believe these problems to be related to my 51-55 dBmv and my only one locked bonded upstream channel. Regarding resolution of the issue I'm having, Arris points to this minimum requirement and Comcast points to the signal levels as meeting Comcast's specification which leaves me still pointing to the green DOCSIS 3.0 upstream … We used to have much stronger signals. Downstream Bonded Channels … He found a noise block filter at the pole. The upstream section lists the channels you are connect to your ISP with. Automated message stated that it would restart my modem, restart never actually came through - though am confident that it would not resolve the issue, as I have restarted and factory reset my modem countless times now. Upstream Channels Upstream channels refers to the data that your computer sends out to the Internet. Channels bonded can be wired links such as a T-1 or DSL line. I logged into my MB8600 and noticed that I only have two downstream channels bonded, all four upstream are still bonded. In a self troubleshooting effort to try to obtain better connectivity / more wiggle room, check to see if there are there any excess/unneeded coax cable splitters in the line leading to the modem that can be eliminated/re-configured. Nope.. There should be at least three. The upstream light is amber, and I find that I occasionally have connectivity problems. Also, there are no splitters between my coax cable drop and the modem. Using a Motorola MB7621. I just purchased an SB6183 (coming from a SB6121) and it supports 16 downstream channels and 4 upstream channels. After an outage last night (I’m in the Central Valley of California) I logged into my MB8600 and noticed that I only have two downstream channels bonded, all four upstream are still bonded. techs. Also this is a brand new home so all the wiring is new as of March 2008, I realize the fact that its new doesn't mean its not bad. So basically I have a "24x4" modem router. Here, 8 channels are bonded for downstream and 1 channel is used for upstream. Verizon offers standard Internet packages with upstream speeds of 20 and 35 Mbps. I don't believe that Comcast has implemented 8 upstream channels anywhere, it's either 3 channels or 4 channels. Only DOCSIS 2 modems support 64QAM (modulation). How many downstream bonded channels does xfinity use? I'm getting … Motorola MB8600 Modem for Comcast. I know this isn't unique to Xfinity and standard business practice but it has me considering CANCELING Xfinity for another service. I have an account with Comcast and have recently been experiencing frequent slowdowns and disconnects. It has 8 downstream and 4 upstream channels. Channel Channel ID Lock Status US Channel Type Frequency Width Power; 1: 1: Locked: SC-QAM Upstream: 35600000 Hz: 6400000 Hz: 41.0 dBmV: 2: 2: Locked: ... For quite some time I've been meaning to contact Xfinity to try to remove my TV service, as I've never used it and only accepted as a part of a package discount. Using a Motorola MB7621. For enjoying superfast gigabit … My internet works fine, and my speed matches my tier (250 Mbps). The Modem is rated for speeds upwards to 680Mbps per Netgears site. The header in Column-3 of your log reads 64QAM. The current spec available today, DOCSIS 3.0, supports downstream speeds from 170 Megabits per second (Mbps) up to 1 Gigabit per second (Gbps), depending on the number of channels used. The current levels provided by Comcast are 38 - 42 across the 4-upstream channels. You're only supposed to have 1 channel per stream. I tried using Xfinity Chat, as my provider is Comcast/Xfinity, and their "support" was more of redircting me to different phone calls. Tried calling comcast again to see if I could schedule a technician to come out and check out my connection. Yes, the more upstream channels that can be bonded provides more (shared) bandwidth that can be utilized. I have had the same internet service and modem for about 8 months, why would it do that? Comcast XFINITY → [Signals] MB8600 now on two downstream channels bonded. The ARRIS SURFboard SB6190 is a DOCSIS 3.0 cable modem with 32 downstream x 8 upstream bonded channels, making it a perfect addition to your home network. It's not likely they'll be able to fix this remotely, unless dropping to a lower speed tier takes care of the problem. Attempted Solution: Cox tech acknowledged my 51-55 dBmv . See, Downstream power is a bit too high. From looking at other postings, I gather that my downstream channels may not be bonding … My new billing statement started on Feb. 2 - March 1. I just acquired a CM600 cable modem, and activated it on Comcast Xfinity. I just acquired a CM600 cable modem, and activated it on Comcast Xfinity. You have  terrible connection !!! He found a noise block filter at the pole. Power Level. It was not prorated. The other half (5-8) won't lock. However, I have a bill for that time period for the full $80.95. I subscribed to new Xfinity service and the tech came out and ran a new cable from the pole to my house. Approved for use with Xfinity internet & voice service. Upstream SNR levels are read at the CMTS on the upstream data channel, not the modem or the modem diagnostic screens. See "Check your signal levels" in. Using the Genie utility for the product I only see 16 Download Bonded channels and 4 Upload bonded channels. On occasion, it drops to 1 bonded. I canceled my xfinity internet serviced on Feb 3. Am going to install amplifier tomorrow. Downstream and upstream power levels are important when determining if the cable line that is connected to your cable modem or modem router is receiving sufficient power. 4 products in 1: DOCSIS 3. Thank you! On the phone, when I canceled, I was told that it would be prorated to around $3. I am on the "Blast Pro Tier" if that matters. 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. On my Arris SB6190, my Upstream channels usually runs 4 bonded. Upset that a loyal customer is being charged a significantly higher rate than a new one. Previous bonding methodologies resided at lower OSI layers, requiring coordination with telecommunications companies for implementation. In the Upstream Bonded Channels section, identify the number of Channels and Type to find verify Upstream Power levels are within the acceptable range for each upstream channel. Bear in mind that if the premises facing techs can not find or fix a problem at your home, it is they who are responsible for escalating it to their line / network / maintenance dept. However, my upstream Symbol rate was 5.120 Msym/sec for a long time. Also, is there a way to reduce the upstream channel … 0 Cable Modem, AC1750 Wi-Fi Access Point, 4-Port Gigiabit Ethernet Router & Xfinity Telephony Modem. Good Upstream power levels are within 38-48 dBmV. Signal to Noise Ratio (SNR) is not listed on the upstream channels because it is measured at the CMTS. Netgear CM500 - Upstream not channel bonding, Re: Netgear CM500 - Upstream not channel bonding, CM500 is only rated by Comcast for use with plan download speeds "Up to 372 Mbps". I don't believe that Comcast has implemented 8 upstream channels anywhere, it's either 3 channels or 4 channels. I noticed that it only has four of the 8 upstream channels bonded. Also, is there a way to reduce the upstream channel … Acceptable Upstream Power Levels (dBmV): The power level on all downstream appears to be good (1.5-3.3). I have contacted Xfinity's costumers service, and they escalted my case to a higher tier of tech support . I bought the C7000 Nighthawk in hopes to use all 8 Upstream Bonded Channels provided, although as soon as I set everything up, it only uses 3 out of 8 Upstream Bonded Channels. Nope.. This field below allows you to modify the frequency the cable modem start with its scan during initialization and registration. to start at the home. I just purchased an SB6183 (coming from a SB6121) and it supports 16 downstream channels and 4 upstream channels. Call them at the phone number on your bill or 1-800-Comcast, or use one of the options on https://www.xfinity.com/support/contact-us/. I believe this is a line problem, and not a modem problem. Have looked up some posts on the forum and it seems like I am having channel bonding issues. I have a C6300 AC1750 modem & router with firmware version 2.01.20 (I think this is the most current version). Signal to Noise Ratio (SNR) is not listed on the upstream channels because it is measured at the CMTS. Average Power is in low 50s in both cases. I'm having issues with my upload speeds when playing games and voice chat. It is normal to have less upstream channels than downstream. Your cable modem’s upload speed (or upsteam channel) determines how much bandwidth of data your computer can send out to the Internet each second at … I have contacted Xfinity's costumers service, and they escalted my case to a higher tier of tech support . So basically I have a "24x4" modem router. This is a measure of how much power is in the upstream channels. Good Downstream power levels are within -7 to +7 dBmV. Power yours with the SB6190. I bought the C7000 Nighthawk in hopes to use all 8 Upstream Bonded Channels provided, although as soon as I set everything up, it only uses 3 out of 8 Upstream Bonded Channels. Downstream and upstream power levels are important when determining if the cable line that is connected to your cable modem or modem router is receiving sufficient power. I'm stuck right now because I'm not sure if the upstream bonded channels being unlocked is the real issue. Therefore, not only can a D3 modem bond multiple channels, but also double the bandwidth of each channel of a D2 modem. Its 24 downstream channels support data speeds of up to 1 Gbps and 8 upstream channels support data speeds of up to 246 Mbps. Enter the new start frequency and restart the cable modem for it to take effect. I believe these problems to be related to my 51-55 dBmv and my only one locked bonded upstream channel. I don't know if 4 is normal until a certain speed or what. As a comparison, DOCSIS 3.x modems support 128QAM upstream. Call them at the phone number on your bill or 1-800-Comcast, or use one of the options on, https://www.xfinity.com/support/contact-us/. Re: Having internet issues - channel bonding. The XB6 had been in place, running in bridge mode, for 2 months. The SB6190 is best for internet speed plans up to 400 Mbps. Cable modems are the heart of your home network. As the post implies the web page … My question would be: Is it common that not all the channels lock? So I went back to Xfinity and they said they're not able to configure any specific channels and they also confirmed that the install file that was sent down to my modem was for the correct speed. Power yours with the SB6190. The SB6190 is best for internet speed plans up to 400 Mbps. Channel bonding doesn't do anything to increase overall upstream capacity, but it does combine several channels to boost peak upstream speeds. Downstream channel light is Green and upstream channel … So I went back to Xfinity and they said they're not able to configure any specific channels and they also confirmed that the install file that was sent down to my modem was for the correct speed. Once the configuration is complete, all connected smart devices can start using higher data speeds of up to 1 Gbps. Cable had to start paying more attention to its upstream when Verizon rolled out its fiber-to-the-home networks and began promising symmetrical speed tiers. Also this is a brand new home so all the wiring is new as of March 2008, I realize the fact that its new doesn't mean its not bad. The upstream channels be connected for my modem indicates that it would be: is it that... 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