Bonded downstream vs downstream. where as Channel 32 which is the highest frequency 4.

Bonded downstream vs downstream. 04 Mbps. What does it mean? Archived post. 6 dB 678624 264515 Oct 24, 2020 · A bucket truck showed up and fixed an issue where my modem was only showing 9 of the usual 16 downstream channels. 5 . This is why understanding upstream vs. 2 MHz, and 6. So basically I have a "24x4" modem router. 1, since the modulation orders of each subcarrier could be different and different across profiles, estimating the DOCSIS channel capacity is no longer simple. Channel 5 is listed as "Not Locked" with unknown modulation, zero power, and zero SNR/MER. Apr 15, 2022 · Downstream Bonded Channels (Partial Service) Channel Lock Status Modulation Channel ID Frequency Power SNR / MER Unerrored Codewords Correctable Codewords Uncorrectable Codewords So for the Downstream Bonded Channels I have 32 channels and Channel 1 is at a power of 9. In addition, advancements in DSL technology such as vectoring, phantom-mode DSL, and G. It combines multiple incoming network connections to increase the download speed. The downstream power levels are a bit high, but may be OK if your internet connection is stable. My plan is 100mbps, and I’m getting 90 right next to the router. Find out about events or articles by following us If you fail to get expected downstream bandwidth it can be pretty indicative of an OFDM problem. 0 Downstream Bonding feature helps cable operators offer new, more bandwidth-intensive services by adding one or more additional downstream quadrature amplitude modulation (QAM) channels to the standard broadband DOCSIS system. Optimize your hosting performance with expert insights and practical tips. But in D3. SNR range is 33. This indicates that there may be a problem with the signal on this channel, potentially leading to connectivity issues. The upstream power is also high side and it may be intermittently fluctuating even higher to out of spec levels. I pulled up the bonded channels and am trying to understand what exactly is wrong. Figure 1. Here's the rule: Attenuators will increase upstream power levels and decrease downstream power levels. Brady and John will explore all aspects of the DOCSIS 3. Mar 7, 2011 · One big difference between upstream and downstream bonding is channel width. If you are watching this on youtube please hit the subscribe button and let us know what you think. Oil and Gas Upstream, Midstream, and Downstream Explained: A Complete Guide The oil and gas industry is the engine of the modern world, a colossal network that powers our cars, heats our homes, and creates the building blocks for countless products we use every day. When I stated channel bonding allowed four DS channels to be bonded, that indicated this was just a minimum. 0 modems transmitting in QAM (ATDMA) modem. While these two functions rely on each other to be fully successful, they frequently work in parallel – yet Jun 6, 2020 · Modem: Nighthawk CM1100 Router: Nighthawk RAX80 Hi, I have Cox gigbit service but I only get around 630mbps max (sometimes 590mbps). 1 specification, section 7. 5 dBmV where as Channel 32 which is the highest frequency 4. 1 modems can operate in OFDMA mode on the same frequency as DOCSIS 3. 1 dBmV. The Upstream bounded context is independent of the Downstream bounded context. 0 Speed Comparison Chart Note that this chart also shows a DOCSIS 3. The downstream typically suffers from fewer impairments than the upstream. upstream operators The first operator established in the Union is considered the upstream operator. Jul 27, 2016 · DOCSIS 3. I've got a DOCSIS 3. You receive more data at once, making activities like streaming videos or downloading files faster and smoother. Upstream refers to the direction of the fluid entering the flow meter, while downstream indicates the direction of the fluid exiting the flow meter. Cable operators are familiar with characterizing and measuring downstream per-channel RF power, or signal level, for 6 MHz- and 8 MHz-wide analog TV signals and single carrier quadrature amplitude modulation (SC-QAM) signals. What do they mean Security Enabled BPI+ Downstream Bonded Channels Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables 1 Locked 256 QAM 45 429000000 Hz 3. Upstream and downstream channels are what make up your total bandwidth or Internet speed. The Downstream BC accepts models exposed by Upstream BC The next set of patterns are to address the asymmetric relationships. Channel-bonding combines the bandwidth of upstream and downstream channels available to cable modems. Each channel is able to deliver about 38 Mbit/s downstream and 27 Mbit/s upstream, after overhead. Jul 1, 2025 · Downstream processing starts after the cells have made the product. There are two production segments in the manufacturing process Upstream processes focus on sourcing and collecting raw materials while Downstream processes start after production is complete. Idea to leverage these patterns to make the dependencies more manageable. 6 dBmv to and average of 1. Estimating downstream and upstream channel capacity was relatively straightforward for SC-QAM channels. Downstream bonded modems still only use 1 Downstream as a primary and of that primary Downstream goes down or lower MER, the modem will reset. Also see: What is DOCSIS 3 channel bonding? May 25, 2020 · The downstream power level ranges between -5. Channel numbers are often displayed with the number of downstream channels first and then the number of upstream channels. The other half (5-8) won't lock. You should get the techs re-involved, especially if you were told that the problem lies beyond your premises, 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. Cable modems often have a diagnostics web page that can help view the cable signal details (signal strength, upstream/downstream power levels, SNR, etc. Most people download more data than they upload so downstream bandwidth is higher than the upstream bandwidth. I checked it and saw only 3 downstream channels were locked. Usually scientists preferably use a three-stage purification strategy. techs. In a Upstream vs downstream oil and gas, learn the key differences, roles, challenges, and innovations shaping the industry’s value chain. So, without any understanding of how your IPTV works (is it IPTV over internet or something like VDOC. DOCSIS 3 allows for "bonding" 6MHz channels together to increase available bandwidth. 1 downstream OFDM channel can transmit broadcast, multicast, or unicast traffic on the downstream subcarriers to all modems, multiple modems, or a single modem, respectively. OFDM vs OFDMA At a high-level, OFDM is for downstream DOCSIS 3. 36 dB for all the 24 channels (out of 32). 8 dBmV 40. It stayed showing 16 channels for a few days after the tech left, but tonight it is back down to only 9 channels again and also the really slow speeds. 4. For CGN3 you should have 20 channels bonded. So 24 downstream channels gives you 960Mbps, which is equivalent to gigabit Ethernet (after overhead, gigabit Ethernet gets about 943Mbps of real throughput when you use standard-sized frames). 0 Upstream and Downstream Bonding have many Advantages. The focus of this article will be on the mechanics of upstream channel bonding and how it works more from a DOCSIS protocol perspective. from the subscriber (US / upstream). 7 . Any suggestions here would be much appreciated Locked post. Over a month ago, the indicator light that shows if downstream channel is locked is blinking green, which signifies downstream channel is not locked. I thought I read somewhere that ideally you want power level for downstream to be as close to 0 as possible. 4 days ago · Downstream functions also integrate customer-facing elements such as marketing strategies, sales operations, and service delivery—components that directly determine customer satisfaction and retention rates. Aug 8, 2020 · You have signal problems with some of the downstream channels ! The SNR's are too low and there are too many uncorrected bit errors. My ISP is comcast. Feb 6, 2023 · Upstream vs downstream O2 sensor - do you know what differentiates them? If you want to see the answer, click this link right now, as we will reveal them all! Sep 8, 2024 · "32 Locked Downstream Bonded Channels", "6 Locked / 2 Not Locked Upstream Bonded Channels", and "1 Locked / 1 Not Locked Downstream OFDM Channels" are normal for your CM1000v2. In basic electrical we often find the words upstream and downstream. 2Gbps plan I'm paying for. In the Downstream Bonded Channels section, identify the Modulation and Power to verify SNR levels are within the acceptable range for each downstream channel. I can also see the upstream bonded channels of my modem. The DOCSIS 3. And UpStream is normally 36~51 dBmV and with 3 Channels bonded. It involves separating the product from the cells and purifying it. With multiple modulation profiles in use simultaneously, the capacity of the channel as seen by each CM may change The downstream power levels on my cable modem are inversely correlated to outside air temperature [OC] OC Archived post. In the world of business and technology, this river represents the flow of resources and information, where the direction you face—upstream or downstream—can change everything. Essentially, these data sending and receiving channels are how you can upload content or download content. For example: When everything is operating properly, we have great advantages for modem speed and operation at the expense of allocating more spectrum for more DOCSIS channels. We always appreciate your feedback. Learn more. . 1. These channels are known as upstream and downstream channels. The key steps Apr 30, 2022 · It was working fine for the last four months. 0 modem and when on the web console, there's 20+ upstream and downstream channels saying "LOCKED" with an SnR and power and whatnot. -3. 1 and higher modems. Oct 6, 2025 · Ever wondered what “upstream” and “downstream” really mean in your HVAC system? Here’s a simple breakdown: **Upstream** refers to the section **before** a component—where air or water is approaching it—while **downstream** is the section **after** the component—where air or water has already passed through. As you can see, my modem has 24 downstream channels. The downstream values are good. Recommendations on nodes with more than four channel bonding should be lowered on the high end to a maximum transmit power of 47 dBmV. The simplest concepts in data engineering can cause the most complicated problems. 0943-5]. Understanding the differences between these two types of insurance is crucial for businesses operating in the energy industry to ensure they have Jun 6, 2025 · Upstream and downstream oil and gas production refer to a company’s location in the supply chain. Nov 20, 2024 · Explore the key differences between upstream vs downstream processes in supply chain management, focusing on their roles, functions, and impacts on production Feb 19, 2025 · Learn the difference between Upstream, Midstream, and Downstream and what are the roles of each of them to Oil&Gas. The upstream channels, however, only half of them lock (channels 1-4). Sep 11, 2024 · Upstream vs. In order to enable multiple upstream channels in a cable modem, a special mode is turned on in the cable called Multiple Transmit Channel mode (MTC mode). 1? Also I'm not getting the download speeds of 1. 7 dB 675375 344015 3 Locked 256 QAM 13 855000000 Hz 8. Traditionally, bioprocess development is split into “upstream” and “downstream” functional groups. Capture intermediate purification, polishing and purification. Subsequently, question is, what is a good dBmV? Generally speaking the signal should be for DownStream between - 10 dBmV to + 10 dBmV . The main purpose of downstream processing is to make a product that is clean, safe to use, and good in qualit y. Mar 21, 2024 · I do agree with you that I have multiple downstream QAM bonded channels. My internet works fine, and my speed matches my tier (250 Mbps). Jul 7, 2014 · Channel bonding is a method by which smaller bandwidth upstream channels are bonded together to create a larger upstream bonding group in the MAC domain. Upstream vs Midstream vs Downstream: What's the Real Difference? The oil and gas industry is a complex and interconnected network, often categorized into three main sectors: upstream, midstream, and downstream. 0 and NOT 3. 0 standard for cable modems supports a minimum of four cable channels bonded together to greatly increase subscribers' upstream and downstream speeds. Analog TV channel signal level in most cases refers to the visual carrier’s peak envelope power (PEP). 50. Oct 12, 2009 · DOCSIS 3. The problem may Feb 12, 2024 · Upstream Channel Bonding in DOCSIS 3. Jun 17, 2025 · Upstream and downstream energy insurance are distinct categories within the broader energy insurance sector, each addressing the unique risks associated with different stages of the oil and gas (and sometimes other energy sources) value chain. The job of a cable modem is to directly communicate with your Internet service provider (ISP) to make this happen. 1 dB 2997525 6169974 2 Locked 256 QAM 5 807000000 Hz 6. Contact the cable provider for details. ). What is upstream bonded channels? Like downstream channel bonding, upstream bonding consists of two or more channels active as an Upstream Bonding Group (UBG). Jul 31, 2014 · DOCSIS 3. The result is ultra fast internet connection. Note: EuroDOCSIS uses wider 8MHz downstream channels, capable of ~50 Mbit/s per downstream channel. 4 dBmV. For example, when air flows through a heating coil, the air **before Jul 9, 2021 · Arris sb8200 modem, 1200 mbps service - Up until recently (about a week now), my correctables and uncorrectables were always close to zero. Mar 25, 2024 · Upstream vs. Oct 2, 2025 · Don't get turned upside down in confusion about the key differences between upstream and downstream oil and gas operations. Mar 26, 2021 · The results are that the Upstream Bonded Channels Power increased from 37 dBmv to 40 dBmv and that the Downstream Bonded Channel power changed from an average of 4. Dec 5, 2018 · The event log might have more details. 7 dB but the uncorrectable are almost 24% of the corrected packets at one of the downstream channels. On my modem, this is detailed in the Cable Connection section: In this section, I can see the downstream bonded channels of my modem. My modem has 8 upstream channels. Apr 25, 2022 · Speed is the channel rate of the connection to the DSLAM. How come I’m getting the same speed as yesterday, when I had all the downstream channels locked? Jun 18, 2014 · DOCSIS Channel Bonding with a focus on Upstream (US), Downstream (DS), Partial mode, Band Width allocation, and Service Group sizing. 1 plant PHY (physical layer) specification so that you can get more comfortable on how the downstream OFDM channels are configured. 5 dBmV, and SNR between 34. I'm not sure what is good or acceptable because I noticed I see different answers all over the place lol. Jun 6, 2020 · What is downstream transmission rate? The maximum rate at which data can be received over an internet connection is known as the downstream bandwidth, and upstream bandwidth is the maximum rate at which data can be sent. Each DOCSIS 3. 3 dBmV. But what's the difference between upstream and downstream USB-C? In this article, we'll explain the difference between the two, and how they can affect your devices. Apr 22, 2025 · Clarification of downstream vs. Understanding the Difference Between Upstream and Downstream Processes in Business EllieB Imagine standing on the banks of a mighty river, watching the water rush by. Modems supporting multiple channels is a feature called channel bonding, and there are different bonded channel amounts. Pattern : Conformist Learn > Cable Modem & Routers > Cable Modems Explained: OFDM vs OFDMA A cable modem uses a coaxial cable to bring an Internet connection into your home. Jun 19, 2025 · Understand upstream and downstream flow in supply chains. In the Downstream Bonded Channels section, verify Power levels are within the acceptable range of - 15 dBmV to + 15 dBmV for each downstream channel. 0 is perhaps best known for its support of channel bonding — specifically, logical channel bonding — in which the downstream and Feb 6, 2025 · Downstream and Upstream Channel Power Levels; Intermittent Internet Connection Issue I recently set up the new cable modem/ router Netgear Nighthawk CAX30 switching from an Arris Surfboard SBG7400AC2. I mean, it not perfect aka optimal but it’s decent! 7/10 technicians were right. the speed to the subscriber (DS / downstream), and the second number is the transmission speed, i. Generally, they are used more in the switchgear section of a circuit but it also has a basic meaning. 34. 4 MHz. I logged into my CM1100 modem and it says that the Downstream Bonded Channel (Partial Service) - only channels locked are 1 - 20 (out of 32), and the rest of the channels are unlocked at 0 values. 0 channel bonding and how it impacts the cable operator. Cable modem's channel bonding reduces WiFi congestion by combining multiple downstream and upstream channels, resulting in faster Wi-Fi. Oct 15, 2024 · Explore the crucial differences between upstream and downstream bandwidth for server. Enhance your architecture and DevOps strategies with this in-depth guide. Xfinity tells me I have strong signal. Jan 31, 2025 · Learn the key differences between upstream and downstream marketing, when to use each strategy, and how they work together for growth. Thanks I'll upload the event log later by the way what is the ideal downstream power level is it true that it must be close to Zero? I found some article on the internet that -3dB is the best and any -5dB to -15dB are not that great or will cause non stable or intermittent connection. First, have you successfully deployed OFDM in the downstream? Prior to considering OFDMA in the upstream, it is a sound decision to deploy OFDM in the downstream first. New comments cannot be posted. The only exception is, if you are getting slowdowns at peak times, a modem with more bonded channels may offer a bit better consistency through its redundant channels. If requested I can post modem screenshots. o downstream with “ (8 channels)” bonded, yielding a data throughput of 343. As you can see, the upstream side has no info or completely blank for all the 8 channels. On the Uploadstream - Channels 1 - 5 (out of 8) are the only ones With recent DSL technology, such as VDSL2 bonded, downstream speeds of 100 Mbps on shorter loop lengths can be achieved. By Nick Segura - As cable operators upgrade their HFC networks on the path to 10G, implementing a high-split 204 MHz architecture is a viable solution. Access Now! If more than four channels are bonded in the upstream, a cable modem’s max transmit may be limited to 48 dBmV if it does not include the extended transmit ECN [MULPIv3. Basic features and application of the terms in practical life. Apr 1, 2010 · DOCSIS 3. That can cause random disconnects, spontaneous re-booting of the modem, speed, packet loss, latency problems, and the un-bonding of channels. 7 dBmv. What exactly does this Lock refer to? Jan 26, 2024 · SAP Ariba — Downstream It refers to operational procurement process which includes managing buyer catalogs, creation and approval of purchase requisitions, creating and sending purchase orders, receiving items, and invoice reconciliation and approval. 3SC Supply Chain explains processes, dependencies, and how they affect planning. USB upstream and downstream refer to the direction of data flow in a USB connection. The power levels for the upstream channels are in the range of 47. Upstream vs Downstream: Integration Within Supply Networks The DOCSIS 3. 6 dBmV 42. Ideally at 0dBmV and SNR 36~40 dB range. [1] An SC-QAM channel’s signal level is its average power, also Dec 18, 2024 · Upstream vs Downstream: Discover the critical roles these supply chain phases play in procurement, efficiency, and sustainability. ‍ Downstream operators place on the market or export relevant products where all the components or ingredients have previously been subject to due diligence under EUDR within a DDS. I have no trouble with the downstream channels, all 24 are locked. My Xfinity plan is 100 Mbps, wirless and wired connection speeds vary from 3-5 Mbps or 20-30 Mbps. downstream marketing FAQ How do upstream and downstream marketing impact product development? An upstream marketing plan that includes analyzing market and competitor data can influence future product development by exposing gaps in the market and revealing unmet consumer desires. Have you ever wondered how these terms shape We would like to show you a description here but the site won’t allow us. Like downstream channel bonding, upstream bonding consists of two or more channels active as an Upstream Upstream vs Downstream in Pipe Flow Measurement When installing a flowmeter, it is essential to understand the concepts of upstream and downstream flow. The maximum theoretically achievable channel rate according to VDSL2 standard is 200 / 100 Mbit/s. Upstream channel bonding has a lot in common with downstream channel bonding. But how does a raw resource buried deep within the earth transform into the fuel in your tank or the plastic in your phone? The USB-C is a new type of connector that is quickly becoming the standard for many devices. The basic types of tailing dams including upstream, modified centerline, centerline and downstream construction methods are described and the pros and cons of each presented. It's a 24x8. e. 6 MHz, 3. Key issues that dictate the type of dam to be selected will be discussed. 93 and 37. 8 and -11. 0 downstream channel represents around 40Mbps of bandwidth. They ARE within specification Xfinity’s downstream dBmv range is between -10dBmv — +10dBmv Xfinity’s upstream power level spec should be between 35 dBmv — 54 dBmv You’re in pretty good shape according to your pictured modem levels. Dec 29, 2022 · Key points: Basic meaning of upstream and downstream in electrical sector The use of these terms in electrical switchgear or protection schemes. Dec 20, 2023 · Downstream channel bonding is like adding more lanes to your highway for incoming traffic. MoCA To provide the Apple TV, which is on the other side of the one-story home, with a fast Internet Jul 29, 2019 · Hello, I have a Netgear Nighthawk AC1900 c7000v2 Cable Modem Router. Noise margin is used as a Jun 3, 2025 · Explore the critical differences between upstream and downstream in software development. QAM transmits data by changing the amplitude of two carriers simultaneously. Since the two carriers are 90? out of phase, the sum of resulting signals have both level and phase variations. 1 communications and is a shared medium for all DOCSIS 3. downstream USB ports: what makes them different? Both are key functions of the USB standard, so let's find out why. Jul 7, 2025 · 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. New comments cannot be posted and votes cannot be cast. This prevalent approach can deliver solid results with proper planning and foresight, particularly around modem transmit levels. 1: Next, we dive into the effects of increasing the number of upstream channels, examining how this influences network performance and capacity. If you put, say, a 12dB attenuator to get the upstream power level from 36->48dBmV, great! The power levels for the downstream channels are in the range of 2. 5 dBmV 40. This is illustrated in Figure 1, from the CM-SP-PHYv3. There are individual challenges associated with the development of both pieces of the process, with upstream focused on producing quality product, and downstream on purifying it. Downstream Upstream While I'm not having any troubles with internet speeds, it's the packet loss that's bugging me and forcing me to drop zoom calls, webpages to timeout, etc. Jul 7, 2014 · cable modems are moved to different downstream channels through DBC, if there is a change in the upstream channel and downstream channel bonding group, but not in the primary downstream channel and the upstream channel change is ignored. downstream data is key. Good Downstream power levels are within -7 to +7 dBmV. 5 In a cable modem what does it mean if channels are locked or not locked? I just bought a CM1000 and saw that channels 1-16 downstream are locked but 17-32 are not, and 1-3 upstream are locked, but 4-8 are not. 2 . Mar 8, 2022 · Downstream vs Upstream The difference between upstream and downstream production processes is that the upstream process refers to all the activities performed to gather all the initial materials for manufacturing, whereas the downstream process includes the refining of crude oil and the retailing of the products to the consumers. 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 a maximum rate of 120 Mbps to customers. I wouldn't have noticed the change but my connection has Feb 10, 2021 · It's just the upstream power that is too high. Upstream refers to the direction from the device to the host, while downstream refers to the direction from the host to the device. My question Jun 30, 2014 · As with anything good there always comes some negatives. fast are expected to boost performance well past 100 Mbps. While the upstream is what is returned from every house back to the cable operator’s headend. This means deploying OFDM has a higher chance of success than deploying OFDMA. The modulation used in the DOCSIS downstream is called Quadrature Amplitude Modulation (QAM), pronounced “kwam”. To view the upstream and downstream power levels: Launch a web browser from a computer or mobile device that is Does anyone have any suggestions on how to get this downstream bonding issue fixed? Am I correct that Netgear showing me unlocked OFDM downstream & upstream channels most likely means I'm receiving DOCSIS 3. Downstream Bonded Channels: Most of the downstream bonded channels appear to be in a locked state and operational, except for Channel 5. While downstream channels all weigh in at 6 MHz, upstream channels can be sized at 1. ) I am hesitant to say much on the matter. Having more downstreams than that is only useful in a few cases: Jan 13, 2025 · Discover the essential differences between upstream and downstream in supply chain management, particularly in oil and gas, and learn how to navigate these sectors effectively. Two speeds are displayed: the first number is the receiving speed, i. I restarted my modem and I saw the downstream light blinking meaning it did not lock all the downstream channels. Good Upstream power levels are within 38-48 dBmV. This means DOCSIS 3. Because a cable modem uses a wired connection, it offers a reliable connection. Jan 30, 2009 · The forward (or downstream) path is from the cable operator’s headend to the subscriber and is generally from 54 MHz to as high as 1000 MHz. Aug 29, 2015 · Introduction What is DOCSIS? What is downstream vs upstream? What are cable modem channels? What is channel bonding? What is QAM? Introduction If you’ve tried to purchase a cable modem recently, yo… May 8, 2023 · Here's what the numbers, like 16x4 and 32x8, mean in cable modem listing. But The issue still remains that my Netgear modem's downstream LED is blinking, the diagnostics say I have poor/partial service, and that the fact that my downstream OFDM channel is not locked means there is an issue. 0-N-10. A MAC domain is a logical sub-component of a Cisco CMTS router and is responsible for implementing all DOCSIS functions on a set of downstream and upstream channels. Furthermore, what should the SNR be on a cable modem? Acceptable SNR Levels (dB): If QAM64, SNR should be 23. yeqp4 6j nmxk co0 ne bv gzrnr3d hkjyudns sijy f8pjwt