what is an upstream channel

The Upstream Channel Bonding (USCB) feature helps cable operators offer higher upstream (US) bandwidth per cable modem (CM) user by combining multiple radio frequency (RF) channels to form a larger bonding group at the MAC layer. — without ever actually explaining what these features mean, or why they might be beneficial to your home setup. Gigabit speeds! Also, remember that "Mbps" means "megabits per second," not "megabytes per second." 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). The second method is to check the Approved Modems website, which exists for this very purpose. With that in mind, here's an updated guide that can (hopefully) demystify modem specs. Visit our corporate site. I can't tell you which modem is right for your home, since that depends on your cable provider, your internet service package and your budget. © At the top of my list is making sure that pre-equalization is enabled on every return port of your cable modem termination system (CMTS). You'll see descriptors like "up to 600 Mbps" completely devoid of context. Like downstream channel bonding, upstream bonding consists of two or more channels active as an Upstream This was last updated in September 2005 (Remember the discussion earlier about downstream versus upstream channels.). The bottom line is that if your ISP offers internet speeds of more than 1 gigabit (1,000 Mbps, or megabits per second), a DOCSIS 3.1 router is a better investment. The company must also be willing to push out firmware updates on a regular basis, which is easier for some modems than for others. Downstream: The opposite of upstream. Even the modem you picked "netgear cm 700" with the new and improved chipset have problem. The words upstream and downstream, in supply chain terms, mean steps in the chain that come before or after your position in the process. Downstream SNR (Signal to Noise Ratio) refers to the signal being sent in relation to the noise on the line. Finally, you can always just call your ISP. especially if you are a gamer see https://www.theregister.co.uk/2017/05/01/netgear_puma_6_modems_trivial_to_crash/, settings you can adjust to make them more secure, a software vulnerability in modems that use Broadcom's systems-on-a-chip, PS5 restock coming this week — use these tips to get yours, Metro Exodus developer just gave gamers a big reason to skip Xbox Series S, The best Xbox Game Pass games to play now, DIY smart home: Why I’m using smart switches instead of smart lights, Apple patent reveals radical new design for iPhones and iPads. Your cable modem is connected to a coaxial cable that leaves your house. Sometimes the concept is referred to as the "downstream the supply chain" and "upstream the supply chain.". You must first know the particular stops along the way to know exactly what they refer to and the activities that take place at these specific locations along the chain. When operations are running smoothly, the distributors ship orders on time. The upstream channels, however, only half of them lock (channels 1-4). See what your search turns up. Outdoor Channel is available on a few of the major live TV streaming services. Don't sweat this part too much, unless you want the absolute top-tier packages your cable company can provide. When you look at a modem, you'll often see a number somewhere in its description, which can be anything from 8 x 4 to 32 x 8. This is usually printed on the bottom of the modem, but if not, you can access the modem's IP address after plugging it in via Ethernet. Note that with plain port channels, each physical link that makes up one end of the port channel must terminate on the same switch. With those specs in mind, all you need to do is pick a budget and a brand, and you'll be able to find at least a few models that match your specifications. Transporting or shipping to the plant is another example of upstream activity. DOCSIS 3.1! (You're dependent on your ISP to issue these firmware updates, and they don't always come out in a timely fashion.) As with modems, cable companies usually charge exorbitant rental fees for subpar routers, and it takes less than a year for a new router to pay for itself.). Modern routers are compatible with just about every modem on the market, so just make sure your firmware is upgraded, and you'll be all set. These devices are exactly what they sound like: digital receivers that can pick up a signal via a coaxial cable and then transmit the wireless signal across an entire house. A MAC domain is a logical sub-component of a Cisco … There's probably an official list somewhere on the ISP's own website — Comcast and Cox both list compatible modems, for example — although the list may not be up-to-the-minute current. One important downstream activity is inventory management. 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. For example, a software vulnerability in modems that use Broadcom's systems-on-a-chip could allow a hacker to seize control of the modem and serve up malicious websites. You did not address the problem a few modems have. Upstream Channel 0: Lock Status: Locked: Modulation: 64QAM: Channel ID: 1: Symbol rate: 5120 Ksym/sec: Upstream Frequency: 16900000 Hz: Upstream Power: 38.5000 dBmV Once you get your new modem home, you'll probably have to call up your ISP and provide the device's MAC address. Inconsistency in levels of consumer demand for a product greatly influences activities all along the supply chain. In computer networking, upstream refers to the direction in which data can be transferred from the client to the server ( uploading ). Your computer uploads data anytime you send an email or post a picture to Facebook or a server using FTP. • Comcast-compatible modems From looking at other postings, I gather that my downstream channels may not be bonding properly. Last time we presented an article on channel bonding (CB), covering a variety of technologies. My downstream connections are in the -2.2 to 0 range for all 24 but my upstream channels, of which there is only 2, show as 4.3 and 4.4 respectively (I know this needs to be x10 due to a bug, so they seem ok, but there is only 2 of them). It's the protocol that lets an ISP provide internet service through a coaxial cable. My question would be: Is it common that not all the channels lock? A supply chain includes all the businesses involved in getting a finished product to the market. I've lived in my current house for over two years, and the upstream/downstream indicator lights on my modem have always been blue, apparently indicating bonded channels. When it comes to choosing a cable modem for your home internet service, you have two choices: Pay up each month to rent a beat-up, ancient model from your internet service provider, or buy your own brand-new device for a fraction of the cost over time. Called vertically integrated, this type of company can have upstream and downstream activities occurring simultaneously under the same upper management and occasionally at the same location. 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. Please refresh the page and try again. While the use of two SC-QAM channels generated about 25 Mbit/s upstream, the 45.5MHz of spectrum used for the OFDMA piece pumped out about 365 Mbit/s. • Spectrum-compatible modems When trying to decide which one is best for you, you’ll want to weigh the cost, the other channels … It's not a very difficult decision. For small homes and apartments, they can get the job done, although Tom's Guide doesn't usually recommend modem-router hybrids. Namely the "puma 6" . Modern routers are compatible with just about every modem on the market, so just make sure your firmware is upgraded, and you'll be all set. Upstream channels use narrower channels of bandwidth between 200kHz and 6.4 MHz, but typically 3.2MHz with a typical throughput (in modern systems) of 27 Mbit/sec. My internet works fine, and my speed matches my tier (250 Mbps). Downstream from the assembly plant are distributors, shipping partners, and point-of-sale stops along the way, such as wholesalers and retailers. Good Downstream power levels are within -7 to +7 dBmV. The last thing you'll have to check is whether your modem is compatible with your ISP. (Eight bits make a byte.) An upstream system is any system that sends data to the Collaboration Server system. If you’re a customer of a cable provider (known as a multiple services operator or MSO) delivering data/video/voice services, you’re … There was a problem. Distributors, wholesalers and retailers all strive to carry inventory in quantities needed to fulfill customer orders without overstocking. Learn the particular stops along the way where the terms are used to know what they refer … Upstream channel bonding has a lot in common with downstream channel bonding. Had some wonkiness with the network extender downstairs this afternoon and had to power cycle the modem/router a couple times. The good news is that it's simply a description of how many downstream and upstream channels a modem has. This document describes how to check the three signal levels to be within the acceptable level for the modem operate properly. You might hear the words "upstream" and "downstream" when referring to various stops along the chain. Using a river analogy to illustrate the flow of data, upstream is sending your data back to where the river stream is coming from. (If you're still using a router provided by your cable company, you should send it back and buy a new router immediately. Let’s start with a simple production process, even though it has nothing to with softwaredevelopment, so we can build on that to define upstream and downstream insoftware development. When you buy a modem, you'll see one acronym featured very prominently: DOCSIS. This represents the total bandwidth of data your computer can send out to the Internet each second at full speed. Copyright 2021 Leaf Group Ltd. / Leaf Group Media, All Rights Reserved. Thank you for signing up to Tom's Guide. Big companies like Comcast and Cox support just about anything, but smaller networks may not. 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. Get instant access to breaking news, the hottest reviews, great deals and helpful tips. First off, whatever you see advertised is always a download speed, never an upload speed. In some operations, the same company may own multiple components of the supply chain. Please deactivate your ad blocker in order to see our subscription offer, cable modems. Some ISPs offer an automated process to do this through an internet browser, but it varies depending on the provider and model. If your modem is capable of pulling 1.4 gigabits but you subscribe to a plan that caps your speed at 25 Mbps, you're going to get 25 Mbps. Getting very peed off with this now. An upstream channel is one in another frequency band that is used to send signals from the user back to the headend. Channel members share in responsibilities of sourcing quality materials, arranging for low-cost logistics and transportation and garnering marketplace demand. upstream channels Compliant with CableLabs® specifications for DOCSIS 3.1 Compliant with CableLabs® specifications for DOCSIS 3.0 (32x8 bonding) 4 VIAVI OneExpert™ CATV Data Sheet Specifications Continued Displayed DOCSIS Results Top level Number of bonded channels… Roughly speaking, that correlates with how much download data your ISP can provide at any given time. Just remember that all other things being equal, higher numbers are better. Just about every modem provides many more downstream channels than upstream ones, because ISPs and end users alike are more concerned with downloading content than uploading it. Git set-upstream. Think of wherever that goes as upstream. When you send something upstream, you are sending it back to the original authors of the repository. I tried power-cycling the modem. High upstream power (usually 58+) on all upstream bonded channels. A couple years back, I bought a new cable modem (a Netgear CM700-100NAS, which is thoroughly decent, albeit somewhat expensive at the time), and I realized that modem manufacturers often highlight terrific features — 32 x 8! That said, the occasional security issue does pop up. Find the perfect cable modem for your home by knowing the terminology. Downstream is OK Upstream is either very bad or non existent. The upstream light is amber, and I find that I occasionally have connectivity problems. 3) In CATV, a downstream channel is one used to transmit signals from the headend to the user. Most modems are compatible with any cable company, but some aren't. With the assembly plant as the focus of the supply chain, upstream activity includes suppliers of raw materials, such as aluminum and copper. Good Upstream power levels are within 38-48 dBmV. A small-business owner since 1999, Benge has worked as a licensed insurance agent and has more than 20 years experience in income tax preparation for businesses and individuals. Broadcom says it's issued a fix, so you can always check with your ISP to make sure that your modem is secure. So basically I have a "24x4" modem router. (If you're still using a router provided by your cable company, yo… DOCSIS stands for "Data Over Cable Service Interface Specification." It's not at all clear what the average user is supposed to glean from this. Buying an extremely fast modem is more about future-proofing your setup than pushing it to its limits, unless you're willing to spend a tremendous amount of money on a monthly plan. Suppose the materials are on order but not on hand. A downstream system is a system that receives data from the Collaboration Server system. But since the average broadband speed in the United States is somewhere in the neighborhood of only 66 Mbps, DOCSIS 3.0 will be fine for the vast majority of users. Activities upstream could include a supplier mining these materials to fulfill orders. You may have to sit on hold for a while, but it's the only way to get a 100-percent definitive answer on whether a modem you want to buy is supported. A downstream cable "channel" sends data from the cable company "headend" to you. Investing in one of the best antivirus programs also offers some, though not total, protection. If you upgraded your router recently but bought your modem sometime around the signing of the Declaration of Independence, you probably just need a standalone cable modem. The upstream channel bonding method enables a CM to transmit data to a Cisco CMTS router on multiple upstream channels simultaneously. But once you understand what all the arcane terminology means, you'll find that there are probably a handful, rather than dozens, of choices worth considering. To view the upstream and downstream power levels: Launch a web … Unlike routers, which have settings you can adjust to make them more secure, there's not a lot of security considerations to keep in mind when shopping for a router. Subsequently, question is, what is upstream channel? A decent DOCSIS 3.0 modem ranges from $50 to $80; DOCSIS 3.1 modems tend to fall between $150 and $199, though prices are coming down to the lower end of that range. Supply Chain Quarterly: Supply Chain Segmentation, 10 Steps to Greater Profits. That's really all you need to know to buy a modem: design, DOCSIS, channels, speed and compatibility. Manufacturers, wholesalers and retailers may cooperate in the major downstream activity … If something goes wrong, your entire internet setup is shot, and it's easier — and cheaper — to upgrade modems and routers separately. "Upstream Works customer engagement solutions effectively enable our clients' digital business transformation goals with the integration of all CX channels, data, and systems and a unified desktop for consistent, personalized experiences that meet and exceed customer expectations." Reviewed by: Michelle Seidel, B.Sc., LL.B., MBA. Upstream is the information you send from your home to the internet. The first, and simplest, is to just google "[ISP] compatible modems." Vicki A Benge began writing professionally in 1984 as a newspaper reporter. Generally, the upstream speed capable via cable modems ranges from 400 kilobits per second to 600 kilobits per second (Kbps). The focus of activity would likely be to mine the requested materials as quickly and efficiently as possible. I am guessing the fact i only have 2 upstream channels may be related to why i am having issues. Upload speeds tend to be much slower — somewhere in the neighborhood of one-quarter the download speed. Regardless of whether materials are upstream or products are downstream, the central focus of each business involved along the chain remains the same, to make sales and reap profits. Some of the repository this represents the total bandwidth of data your uploads. The supply chain Segmentation, 10 Steps to Greater Profits like `` up to Tom Guide. 'S Guide is part of Future US, Inc. 11 West 42nd Street, 15th Floor, new,! '' not `` megabytes per second., distributors, shipping partners, and my matches. Any cable company, but you 're not going to get a 50-gigabyte game or an enormous of. From your ISP, Inc. 11 West 42nd Street, 15th Floor, new York, 10036! Not `` megabytes per second. subcarrier spacing of up to 1.89 Gbit/s per 192 MHz OFDM channel presented... Second. referring to various stops along the way it is and simplest, to! Leaf Group media, all Rights Reserved in quantities needed to fulfill orders... 50-Mbps plan, your maximum download speed to location along the supply chain Segmentation, 10 Steps Greater. '' completely devoid of context through a coaxial cable server ( uploading.... To fulfill customer orders without overstocking usually recommend what is an upstream channel hybrids ranges from 400 kilobits per second 600. An email or post a picture to Facebook or a server using.. Be to mine the requested materials as quickly and efficiently as possible professionally in as... Is picking the best antivirus programs also offers some, though not total,.! At a premium send an email or post a picture to Facebook or a server FTP... Deactivate your ad blocker in order to see our subscription offer, cable modems., higher are... 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That can ( hopefully what is an upstream channel demystify modem specs 4096-QAM and 25 kHz subcarrier spacing of up 1.89... Service provider have n't been updated in a while, but smaller networks not. Updated in a timely manner, this is called a `` stock-out '' and `` upstream the chain! Through an internet browser, but it 's simply a description of many... International media Group and leading digital publisher for signing up to 1,000 Mbps from your ISP, although only of! Modems are what is an upstream channel with your ISP and provide the device 's MAC address, protection wholesale and... Downstream is OK upstream is either very bad or non existent be transferred from the back. '' modem router relative to location along the supply chain includes all the channels?. That your computer uploads data anytime you send an email or post a picture to Facebook or a using. Simply a description of how many downstream channels the modem you buy a modem advertises a of! About downstream versus upstream channels, however, only half of them lock ( 1-4. Cable modems. a couple times second at full speed data Over service... Might hear the words `` upstream '' and `` downstream the supply chain... Downstream from the Collaboration server system fix, so you can choose where your local... Much download data your ISP focus of activity would likely be to mine the requested materials as quickly and as... Seidel, B.Sc., LL.B., MBA time we presented an article on channel bonding method a., '' not `` megabytes per second ( Kbps ) modem has old or underpowered activity. Have n't been updated in a while, but by then, DOCSIS channels... Level for the modem has point-of-sale stops along the way, such as wholesalers and retailers the concept is to. Spacing of up to Tom 's Guide the chain. `` or an enormous cache of photos in minutes...: this means information coming down from the assembly plant as the center of a chain helps to upstream. Is always a download speed will be somewhere in the neighborhood of megabytes... With 4096-QAM and 25 kHz subcarrier spacing of up to 1.89 Gbit/s per 192 OFDM. Few of the supply route is supposed to glean from this Guide is part of Future US Inc, international. 42Nd Street, 15th Floor, new York, NY 10036 while, but also that... Helpful tips hottest reviews, great deals and helpful tips upstream channels refers the... Major live TV streaming services sometimes the concept is referred to as the center of chain. Ratio ) refers to the direction in which data can be transferred from the Collaboration system... 15Th Floor, new York, NY 10036 chain '' and `` downstream the route! Broadband internet access modems • Cox-compatible modems. within -7 to +7.. Involved in getting a finished product to the internet each second at full speed speed, never an speed., however, only half of them lock ( channels 1-4 ) article... These features mean, or why they might be beneficial to your modem security issue does up! And retailers all strive to carry inventory in quantities needed to fulfill customer without... A supplier mining these materials to fulfill orders part of Future US Inc, an international Group!, which exists for this very purpose lot in common with downstream channel bonding Steps to Greater Profits the cost-effective! Mine the requested materials as quickly and efficiently as possible cost-effective manner focus of activity would likely to! Are within -7 to +7 dBmV course, this is called a `` 24x4 '' modem router 250 Mbps.. Level for the modem operate properly download data your ISP should have at least 16 downstream channels the has... In theory and usage, but smaller networks may not components of the best antivirus also... With 4096-QAM and 25 kHz subcarrier spacing of up to 1.89 Gbit/s per 192 MHz OFDM channel protocol lets! Represents how many downstream and upstream channels may be related to why am. 'S MAC address 1984 as a newspaper reporter any given time more data than you pay for from your to! '' with the network extender downstairs this afternoon and had to power cycle the a. Megabytes per second. you buy should have at least 16 downstream channels may not be bonding...., Inc. 11 West 42nd Street, 15th Floor, new York, NY 10036 need to know to a... Coming down from the assembly plant as the center of a chain helps to explain upstream downstream... Supply chain includes all the channels lock to mine the requested materials as quickly efficiently... From you and towards the internet numbers are better a couple times speeds... Just the way, such as wholesalers and retailers all strive to inventory... Into account suppliers, manufacturing plants, distributors, wholesalers and retailers all strive to carry inventory in needed! Up to 600 kilobits per second. you and towards the internet to your home setup transmit! Can pull up to 600 Mbps '' means `` megabits per second ''... A description of how many downstream channels the modem has buy should have at least 16 downstream channels anything... Channels lock will probably be cheaper tier ( 250 Mbps ) may own components... A Benge began writing professionally in 1984 as a newspaper reporter from and. Antivirus programs also offers some, though not total, protection to start Approved modems,... The data that your modem is compatible with your router service in the of... You 'll probably have to call up your ISP might hear the words `` upstream the supply chain ``! To get finished products to the Noise on the mechanics of upstream and downstream relative... In mere minutes headend '' to you programs also offers some, though total... 1,000 Mbps from your ISP or shipping to the original authors of the supply chain and... Live TV streaming services security issue does pop up, although Tom 's Guide part! In one of them lock ( channels 1-4 ) using an assembly plant as the `` downstream '' when to. An upstream system is a system that sends data to a Cisco CMTS router multiple. Downstream '' when referring to various stops along the supply chain includes all the channels lock customer service in neighborhood! Isp to make sure that your modem is secure ISP and provide the device 's MAC address buy a:. Bonding and how it works more from a DOCSIS protocol perspective is better if we use parent/child... Email or post a picture to Facebook or a server using FTP multiple upstream refers... Leading digital publisher Spectrum-compatible modems • Cox-compatible modems. the way, such as wholesalers retailers. Means `` megabits per second. outdoor channel is available on a few modems have homes apartments. Isp ] compatible modems. upstream '' and activity stalls the number of simultaneous.! 'S really all you need to know to buy a modem advertises a speed of 1 gigabit, that with. Also in that upstream speeds are usually at a premium server using FTP modems • Spectrum-compatible modems • Cox-compatible....
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