One of my colleagues, Frank Eichenlaub, has seen upstream CNR degraded by as much as 16 dB because of misaligned fiber links! Today I upgraded to a 24x8 channel DOCSIS 3.0 modem (The Motorola MB7621), from the 16x4 channel modem supplied by Spectrum. You can view bonding by logging into the modem.Verifying the Upstream Channel Bonding ConfigurationUse the following show commands to verify the upstream channel bonding configuration:•show cable mac-domain upstream-service-group•show cable fiber … My Motorola MB7420 upstream front panel light is green indicating it is only connected on one channel. Only one channel upstream, how to get more? My issue is that i checked the gateway page for the Netgear AC1900 c7000 we own and i have only 1 upstream channel locked and 7 others which are blank but all 24 downstream channels locked in. Neither Microsoft nor macOS computers can bond two different connections on their own. Instead, they use only one connection at a time. This feature balances the utilization only if there is one upstream channel bonding group configured per MAC domain. Day 3, one more upstream channel dropped and only one upstream channel remained bonded. A 16-QAM 3.2 MHz upstream channel will deliver about 8-9 Mbps net. The SWM-8 uses 2.3Mhz, while your cable modem upstream is 23Mhz+. The modem used to bond to all 4 channels, now it only bonds to 2 channels. The current levels provided by Comcast are 38 - 42 across the 4-upstream channels. Restrictions: This feature is supported only on one upstream bonding group under a MAC domain. Day 2, two upstream channels dropped and only two upstream channels remained bonded. Support. Re: Intermittent connection and only 1 upstream bonded channel on ‎10-04-2020 17:58 Only one upstream channel is not normal it should be four and 5.7 is actually 57 (a bug in the hub 3 puts the decimal point in the wrong place) which is well above the recommend max of 51. Ideally, it should be as close to zero as possible. I've had TWC send "refresh signals" to … Forum discussion: My sb6183 used to bond with 4 upstream channels before I got Maxx upgrade to 200 MB. After taking a look at the modems signals, it shows I only now have 1 upstream bonded channel, when before I had 8; which 4 were active. NOTE 1: A typical setup for Internet access consist of connecting one computer or a Wi-Fi router directly to the cable modem. Please Reload/Refresh this Page for a new reading 5 dBmV . You'll have some downstream channels and also some upstream channels. Channel bonding provides cable operators with a flexible way to significantly increase downstream speeds to a maximum of 160 Mbps, and upstream throughput up to … Channel bonding can increase your internet speed by nearly 50%. Each one has separate power levels and SNR listed for it. Frequency 675000000 Hz. Signal to Noise Ratio 38 dB. I am using an SB6190 Arris. This question is about "Motorola MB7420 upstream channels", with Time Warner Cable internet and apps. ), but only 4 upstream channels, out of the 8 available on my modem. It has 8 downstream and 4 upstream channels. These Quorans are beyond knowledgeable about such things. The modems will connect to the cmts fine and the downstream will bond with 8 downstreams just fine. The status page seems to indicate that I have four upstream bonded channels. For some reason, my Arris SB8200 modem's status page shows only one channel being locked (e.g. See modem teaming . Power Level The Downstream Power Level reading is a snapshot taken at the time this page was requested. I will add my answer only due to an A2A. These are classified into two types, upstream and downstream. To achieve Gigablast or Ultimate speeds, a DOCSIS 3.1 modem is required. (8x4 modems) However, it appears that the modems will only bond with one upstream channel, and that channel will vary from modem to modem so its clear they're all being used. Interestingly, upstream light is green (indicating DOCSIS 3.0 for upstream/send)? Checking with Arris they stated that the SB8200 requires a minimum upstream signal level of 45 dbmv. This means if you have a download speed of up to 6 Mbps, you could potentially get up to 12 Mbps with channel bonding. Screen shot of the channel statistics attached. After upgrading to the DPC3008, I have only 1 downstream channel and 1 upstream channel. Verify all cable connections and try resetting the modem. Channel Bonding. Connecting a Wi-Fi router to the SB8200 is recommended when there are multiple client devices in the home network. Connect your computer to the first DSL line. It allows me to get over 10 Mbps upstream speeds. Older version DOCSIS 2.0 modems can only utilize one downstream and one upstream channel at a time and it’s forced to use the channel the cable company’s headend tells it to use. I used to have Comcast's 105 Mbs service, which uses 4 bonded channels downstream and 2 bonded channels upstream. Forum discussion: 3 channel upstream bonding was enabled in my area a while ago and for a long time it worked great. I'm currently testing both Netgear and SA Docsis 3.0 modems with IOS 12.2.33(SCC3) and I cant seem to get it working right :| I'm seeing modems registering as MTC-modems (/UB) with only one US (with two in the configured bonding group). The other answers here are vastly more complete than I could hope to be. A 64-QAM 6 MHz downstream will deliver about 28 Mbps net throughput. Hello, I have been working on a 16x4 configuration with a uBR10k in a lab using docsis 3.0 modems. Its probably more likely that your area is not congested enough to warrant them opening all 4 upstream channels. Also, the signal to noise ratio is 0 on one of the downstream channels (between 38.3 and 39.0 on all others.) Interestingly, the per-channel reduction doesn’t exactly follow the basic P max – 10*log 10 ( N) relationship. out of my modem's 32 channels?!? Has anybody succeeded in combining Cable Modem steering with Upstream Bonding ? Verify all cable connections and try resetting the modem. I know there is one solution on the Comcast forums. Increasing your internet connection speed would allow for more devices to be connected at once or for better quality online activities, such as streaming or gaming. So, because you're bonded you usually can only max out one line or in speed tests? A 24-channel modem could deliver 912Mbps downstream, and 32 channels … The DOCSIS 3.0 standard for cable modems supports a minimum of four cable channels bonded together to greatly increase subscribers' upstream and downstream speeds. Downstream Modulation QAM256. SBG6580 enables channel bonding of up to eight downstream and four upstream channels – which allows an operator to offer their customers advanced multimedia services, capable of data rates of over 300 Mbps in DOCSIS and 400 Mbps in EuroDOCSIS in the received (downstream) data stream and over 100 Mbps in the send (upstream) data stream. My SNR and power levels are all well within acceptable ranges and I bond to all 4 channels upstream. Downstream power levels should be between -10 dBmV and 10 dBmV. The solution was to add cable mtc-mode under cable 1/0 and cable 1/1. The downstream light does show blue on the front of the modem (indicating that DOCSIS 3.1 is being used for downstream). For ultra-high-definition (UHD) television, only three or four channels would fit on a 36 MHz transponder. And it is not his job to do so. used?) Hello, This is my first post I've been having issues with my internet connection for a while now specificaly packet losses at peak times which would hit 25-30%, and during the day they linger around 5-10%. 24x8 channel bonding. Once the modem was activated, it bonded to all 24 downstream channels (yay! DOCSIS 3.0 gains bandwidth by bonding together 6MHz channels, each of which can carry about 38Mbps. Downstream Bonding Channel Value Channel ID 11. When multiple upstream bonding groups are configured under a MAC domain, the utilization is unfair. If I remove the US attribute masks I can get the modems to Is my modem broken? And then I noticed this when I looked into my Hitron CGN3ACSMR Modem/router, Only one … When downstream DOCSIS channels are bonded, the per-channel maximum power also drops. ... Posted January 25, 2015. The modem indicates 3.1 / blue on the downstream but the upstream is showing 3.0 / green. I've had TWC send "refresh signals" to … None - multiple upstream channel is in use: Blinking Blue: Negotiating multiple upstream bonded channels. You can use either Wi-Fi or Ethernet. Upstream bonding was only working on one channel. The bonding of … Day 2, two upstream channels dropped and only two upstream channels remained bonded. I am not familar with this technology though, so I think the best way to test is to bypass the equipment and see how your signal levels change on the modem. Note: This port is a LAN Gigabit Ethernet port. Day 3, one more upstream channel dropped and only one upstream channel remained bonded. Provides internet access to a single device. Day 1 of activation, all four upstream channels bonded. Now I only get one blue light on my modem and one upstream channel. Day 1 of activation, all four upstream channels bonded. However, there is only one Engineer there that knows how to escalate this issue to to get the problem resolved. Only one port is active at a time. Additionally, it is possible to bond multiple cellular links for an aggregated wireless bonded link. Hello, I just bought a C7000 Nighthawk to replace my SBG 6700ac due to internet drops. What about the CMTS? Solid Green: None - one upstream channel is in use: Blinking Green: Scanning for an upstream channel. My modem is a fairly new Cisco DPC3008. The first step is simple. Broadband bonding is a type of channel bonding that refers to aggregation of multiple channels at OSI layers at level four or above. However, the power level on 1 of the upstream is 0. I have checked the drop line from the street to my house and these are what the values show in the image. The power level on all downstream appears to be good (1.5-3.3). Channels bonded can be wired links such as a T-1 or DSL line . 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