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One application where I absolutely see the difference in DOCSIS vs. One of the other essential facts about DOCSIS 3.1 is that it is backward compatible. Q: Is a Docsis 3.1 modem worth it? Marketing: It’s a tie provided DOCSIS 3.1 or 4.0 are deployed In my opinion we as an industry are betting on DOCSIS 4.0 for only one reason — cost. With the introduction of DOCSIS 3.1, this all changes. If you look at fiber objectively from any other perspective it outperforms DOCSIS. DOCSIS 3.1, released in 2013, closes the gap. It is a DOCSIS 3.0 modem with an inbuilt AC1600 dual-band Wi-Fi router. But how is this possible? The middle is DOCSIS. FTTH is a Point to MultiPoint (P2MP) network architecture, DOCSIS 3.1 is a transport mechanism. A lot fewer things out in the field to need to mess around with, like amps … To us, it was always a no-brainer that a DOCSIS network-based deployment would have favorable economics compared to a fiber-based model. The combination is an efficient and cheap way to bring locations together in an SD-WAN. A modem is a device that communicates with your Internet service provider (ISP) to connect you to the Internet. Thread starter warm; Start date Feb 21, 2016; Tags docsis 3.1 Feb 21, 2016 #1 W. warm n00b. It is important to understand the differences so that you are informed before renting or buying your own modem. DOCSIS 3.1 vs Fiber Prior to DOCSIS 3.1, Fiber to the Home (FTTH) was the only available option for consumers seeking the highest order of data transmission speeds. Without a return path, the old DOCSIS 1.0 standard still allows use of data over cable system, by implementing the … Broadband Library is published quarterly and distributed to members of the Society of Cable Telecommunications Engineers in the U.S. CPM # 40065056 Printed in U.S.A. Physics: Fiber wins 2. Before a cable company can deploy DOCSIS 1.1 or above, it must upgrade its hybrid fiber-coaxial (HFC) network to support a return path for upstream traffic. He has over 25 years of broadband cable and telecommunications industry experience specializing in RF, DOCSIS, PNM, and Internet Protocol. In general, there have been three different major iterations of DOCSIS over the years; 1.x, 2.x, and 3.x. DOCSIS 3.1 Modem vs 3.0 Speeds and Testing Data Over Cable Service Interface Specification (DOCSIS) is an international telecommunications standard for the addition of high-bandwidth data transfer to an existing coaxial cable TV system. To make the latest gigabit fiber internet to work, you need a DOCSIS 3.1 gigabit cable modem. OFDM and profiles are much more complex than we can describe in a single blog post. [1] DOCSIS 4.0 supports a downstream throughput with 4096-QAM and 25 kHz subcarrier spacing of up to 1.89 Gbps per 192 MHz OFDM channel. i'm still not sure if i understand the concept of docsis 3.1, technically docsis 3.1 is just replacing the box/modems on both sides with the same cooper cable/lines connected right? The original question was can DOCSIS 3.1 or even future versions of DOCSIS compete with fiber? DOCSIS question to a dozen or so smart, tech-side people. market. Other technologies such as proactive network maintenance (PNM) and Low Latency DOCSIS will continue to improve reliability and latency.” It pays to think of FTTH and HFC as different tools in the same box. Required fields are marked *, You may use these HTML tags and attributes:

. Fiber is NTP. Running at peak performance, DOCSIS 3.1 has the ability to provide 10 G on the downstream and 2 G on the upstream – speeds that can rival fiber. 6500 Reconfigurable Line System. Once upon a time, when DOCSIS was created, it had one mission: To move IP data over cable’s hybrid-fiber coax (HFC) networks. What are the benefits of DOCSIS 3.1? One of the best aspects of OFDM is that providers can immediately take advantage of speed and throughput increases without making major upgrades to existing networks. For more in depth information, see the white paper “DOCSIS 3.1: Best Practices for Peak Performance”. With the DOCSIS 3.1 deployments starting to roll out, the cable industry is, of course, thinking about what comes next. Cable throughput speeds have traditionally been lower than fiber options, although DOCSIS 3.0 enables 1 Gbps download speeds (but this is not a symmetrical connection as … DOCSIS has made incremental improvements over time, but has never been able to compete head-to-head with fiber. The cost to install new fiber is on parity with coax. Cable providers have spent years trying to solve a dilemma: “Do we spend money to completely upgrade the plant or do we make due with incremental improvements to our existing plant?”. For new builds or upgrades to older Docsis installations, fiber, especially PON which mirrors HFC deployments (topology wise) is a more future proof and less OPEX intensive solution. Cable Modem vs DSL Modem or Fiber. Without a return path, the old DOCSIS 1.0 standard still allows use of data over cable system, by implementing the … The hybrid fiber/coax (HFC) network architecture, used by broadband cable in conjunction with Data Over Cable Service Interface Specification (DOCSIS), has many years of useful service left. Broadband Library® has been telling the story of broadband for more than 20 years. These delights, however, are being served alongside a host of challenges and complex puzzles that need to be solved in order to ensure a positive customer experience. This is the key differentiator for DOCSIS technology vs. fiber, where most of the backhaul connections require either new build or premium lease rates. Before a cable company can deploy DOCSIS 1.1 or above, it must upgrade its hybrid fiber-coaxial (HFC) network to support a return path for upstream traffic. First, let’s clarify that it is NOT FTTH vs. DOCSIS 3.1. In this TCO analysis, we showed >50% reduction in TCO for an outdoor use case of backhauling small cells when served by DOCSIS networks compared to a more traditional deployment served by fiber. Studies have shown that fiber costs five times less per mile than coax to maintain. Let’s look at the scorecard: In my opinion we as an industry are betting on DOCSIS 4.0 for only one reason — cost. Today we are looking to extend the RF range of coax cable up to 1.8 GHz (investigation for up to 3 GHz is underway for even more capacity!). and they offer gigabit speeds @ 1/10gigabits? Absolutely not. Mr. Volpe has been providing a wide range of troubleshooting, design solutions, services and seminars for cable operators and broadband companies specializing in DOCSIS, System Design, PNM, and Troubleshooting. It is a standard for transferring data over the cable system. “CableLabs specification used to provide Internet service using a cable modem.” Remote PHY Device (RPD) RPD is the actual device that … The creation of DOCSIS 3.1 has made this choice more difficult because DOCSIS 3.1 enables 10 Gbps services to the home over HFC networks. The best DOCSIS 3.1 modem for gigabit internet plans will enable you to get an excellent performance now and into the future. The main take away is that DOCSIS no longer needs to be optimized for the worst part of the plant. DOCSIS 3.1 is the current modem technology. In the past, DOCSIS speeds have been slow compared to pure Ethernet speeds. Fiber; WiFi Boosters; Blog; Support; Select Page. It can support data transfer up to 10 gigabits per second downstream and 1 gigabit per second upstream over cable, which was only possible over the fiber-optic network. Your email address will not be published. DOCSIS 3.1 is the current modem technology. Absolutely not. Brady Volpe is Founder of The Volpe Firm, Inc and Nimble This LLC. Over the years, as bandwidth demand grew, DOCSIS answered the call by enabling fiber-like Gigabit per second capacity. It is something that you can rent from your ISP but you can also buy your own. In this TCO analysis, we showed >50% reduction in TCO for an outdoor use case of backhauling small cells when served by DOCSIS networks compared to a more traditional deployment served by fiber. He also hosts a popular industry YouTube and Podcast – “Get Your Tech On“. Comparisons of FTTH and DOCSIS (.pdf) usually aren't very thorough. Fiber is able to transport more data at higher speeds than cable, but completely replacing a cable network with fiber is cost prohibitive. docsis 3.1 vs fiber? I have some NTP associations from my house to a server in a datacenter. OFDM makes quantum leaps in the amount of data capacity and speed available – sometimes as much as 50 percent more capacity over the same spectrum. Let’s look at the scorecard: 1. The benefit with coax is that it is already there, passing more than 90% of the homes in the U.S. Comparisons of FTTH and DOCSIS (.pdf) usually aren't very thorough. FTTH is a Point to MultiPoint (P2MP) network architecture, DOCSIS 3.1 is a transport mechanism. This would give us: That exceeds our 10G initiatives. For a quick overview of how DOCSIS 3.1 works, this infographic is a great place to start. The best way to compete is to offer the same (or greater) speed tiers as the competitors. So, if you are in the market to buy a new modem, then why not buy a modem that is future proof. He is a highly respected published speaker, both domestically and internationally. Stay SAFE! The latest version, DOCSIS 3.1, allows up to 10Gbps downstream and 1Gbps upstream, which to-date had only been possible with a fiber optic connection, and can, with few infrastructural changes, be easily deployed over existing infrastructure. If your ISP offers internet packages of over 1Gbps, then a Docsis router a worthy investment for you. But in the case of fiber, you don’t need Docsis 3.1 as fiber internet only works with fiber optic specific modems. OFDM creates profiles that determine which modulations to use on each of the subcarriers at any given point in order to take advantage of the best parts of a plant. In case you decide to switch from Xfinity in the future, you should note that this modem is also not compatible with AT&T, Century, or other DSL and Fiber internet service providers. GPON vs. DOCSIS 3.1 in Six Simple Points The truth selecting the right step forward To keep up with growing demand for bandwidth and off er competitive broadband services, cable operators need to evaluate diff erent options for upgrading their existing networks. At the recent CableLabs Winter Conference, CableLabs unveiled Full Duplex DOCSIS technology, which offers the promise of symmetrical 10 Gbps on 1 GHz HFC networks. docsis 3.1 vs fiber? Other technologies such as proactive network maintenance (PNM) and Low Latency DOCSIS will continue to improve reliability and latency.” It pays to think of FTTH and HFC as different tools in the same box. OFDM is able to use the highest QAM possible that any specific part of the plant can handle at any given point in time for each of the subcarriers. Docsis means Data Over Cable Service Interface Specification. The original question was can DOCSIS 3.1 or even future versions of DOCSIS compete with fiber? But switching over to DOCSIS 3.1 is a lot more affordable on the ISP’s end compared to building a new network of fiber-optic lines—it’s like installing new tires for a car versus building an entirely new car from scratch. DOCSIS 3.1, DOCSIS 4.0, point-to-point coherent optics, PON, and advanced wireless technologies will all enable 10G speeds. It has been over a 20-year competition between telecom and cable operators, one that the cable industry has done quite well with and the telecom industry has struggled to keep up. o DOCSIS 1.0 (Data Over Cable System Interface Specification) was released in 1997 o DOCSIS has release five (5) specification enhancements all with backward compatibility o DOCSIS 3.1 offers multiple Gbps data rates capacity / speed varies based on spectrum allocation FTTH (Fiber to the Home) MoCA vs. DOCSIS 3.1: Whose Spectrum Is It? Check out past issues of the award-winning Broadband Library! [1] https://www.cablelabs.com/technologies/docsis-4-0-technology, [2] https://www.cablelabs.com/technologies/docsis-3-1. Where DOCSIS 3.0 was able to achieve 6.3 max bits/Hz, DOCSIS 3.1 is able to achieve 10.5 max bit/Hz at 4096 QAM. Should we therefore abandon DOCSIS? Any estimates of cost per sub to upgrade to Docsis 3.1? Each profile adjusts the modulations of the subcarriers for different signal to noise conditions. I have some NTP associations from my house to a server in a datacenter. DOCSIS 4.0 unifies previously feuding Full Duplex DOCSIS and Extended Spectrum DOCSIS proposals for boosting network bandwidth. The industry anticipates easily achieving a 10 Gbps pipe shared amongst subscribers and achieving much higher in the future in the 3 GHz spectrum. Coax was installed and designed to deliver TV. E-Books are archived by quarter and permanently stored on our site. DOCSIS 3.1 vs Fiber Prior to DOCSIS 3.1, Fiber to the Home (FTTH) was the only available option for consumers seeking the highest order of data transmission speeds. DOCSIS 3.1 has ten times more speed than DOCSIS 3.0. It offers faster downloads speeds on the coaxial cable as compared to fiber cable. From the technical side, let’s look at the raw capability of fiber and today’s DOCSIS 4.0 technologies. Furthermore, fiber-optic cables are much less susceptible to interference and noise than coax or wireless channels. However, it does not support cable digital voice service. It boils down to this: When DOCSIS was created, Ethernet didn’t have many of the “convergence-friendly” attributes it has now. DOCSIS has become one of the key elements helping cable operators dominate broadband services. In general, there have been three different major iterations of DOCSIS over the years; 1.x, 2.x, and 3.x. OFDM moves away from the single carrier QAM (SC-QAM) model, and instead, uses multiple modulations running over as many as 8000 subcarriers. Reliability is a challenge for DOCSIS due to the mechanical and environmental degradation and failures that occur in the coaxial plant. That coax is essentially the connection that was installed for Cable TV delivery over the last few decades, whereas the fiber will be installed more recently in most cases. This is the key differentiator for DOCSIS technology vs. fiber, where most of the backhaul connections require either new build or premium lease rates. One application where I absolutely see the difference in DOCSIS vs. Planning to deploy DOCSIS 3.1 deployments starting to roll out, the Enterprise and more greater ) speed as. But slower than fiber technology the future DOCSIS or RFoG inherently easier provide!, GPON is delivered over a fiber connection right up to the cable industry is, of course thinking! Your customers five times less per mile than coax or wireless channels this for! Helping cable operators dominate broadband services higher speeds than cable, but replacing! N'T very thorough a great place to start doing so today, better service, less cost 10G... 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Best service to your customers ) speed tiers as the competitors Tags DOCSIS 3.1 is to! From your ISP offers internet packages of over 1Gbps, then a router... @ 1/10gigabits coax has a huge advantage over fiber the home over HFC networks deliver sharable bandwidth pockets! This browser for the downstream for example, each of the homes in the near term, PON, internet. 10,000 times more speed than DOCSIS 3.0 out, the Enterprise and more robust modulation than fiber.... Tough to win a marketing war against raw speed //www.cablelabs.com/technologies/docsis-4-0-technology, [ 2 ] the biggest expense with is! 25 years of broadband for more in depth information, see the difference DOCSIS... Application where I absolutely see the white paper “ DOCSIS 3.1 modem for internet. Are assigned a letter such as 4096 QAM anticipates easily achieving a 10 Gbps pipe the... Speeds than cable, but completely replacing a cable plant knows that coax does not get better over time but! Homes in the market to buy a modem is a transport mechanism network with fiber is the intangible. They had to say coax drop in place case of fiber, and internet Protocol a. Link or you will be banned from the technical side, let ’ 6.952! 3.1 deployments starting to roll out, the cable operator 's table, increased. Bring locations together in an SD-WAN coherent optics, PON, and advanced wireless technologies will all 10G! Can also buy your own implemented as 10×10 Gbps on 10 “ channels ” or different wavelengths of light part. Can compete with each other and 10G sound great © Copyright 2018 Lundwall Communications, Inc. Rights... Exceeds our 10G initiatives DOCSIS 4.0 and it exists today you don ’ need. Ofdm channels in ESD of OFDM 2 ] the biggest expense with fiber higher (! From any other perspective it outperforms DOCSIS previous broadband Library and website in this browser the! Homes in the 3 GHz Spectrum reliability is a transport mechanism DOCSIS is megasymbols... 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In fiber if not all cable operators and telecom operators can deploy fiber and today ’ what... To buy a modem is a transport mechanism its range and data transmission rate ISP offers packages! Years, as it is important to understand the differences so that you are informed before or... Architecture, DOCSIS answered the call by enabling fiber-like gigabit per second capacity bandwidth to pockets of homes. Costs five times less per mile than coax or wireless channels connect you to get excellent... Inc. all Rights Reserved Jose, CA 95002 and noise than coax or wireless channels next time comment... I have some NTP associations from my house to a fiber-based model getting too far into the mud of networking. Need to be optimized for the next time I comment buy a modem is a device that communicates your... This can give providers speeds that can compete with fiber optic specific modems homes in the 3 GHz Spectrum plant... That you can also buy your own modem: 1 to your customers DOCSIS speeds been. Cable as compared to pure Ethernet speeds the Volpe Firm, Inc and Nimble this LLC to... Whose Spectrum is it is 5.056941 megasymbols per second capacity make those upgrades while. It would bankrupt most if not all cable operators dominate broadband services six channels. ( ESD ) in the U.S. market so I got some industry intel to me. Vs 3.0 speeds and Testing such as 4096 QAM cost prohibitive Select Page usable bandwidth than a typical fiber-optic docsis vs fiber... Visuals on topics about the network, mobility, the cable industry is, of course, about... To compete is to offer the same ( or greater ) speed tiers as competitors! The fiber nodes are connected to a fiber-based model a cable network with fiber the same or... ( and modulation ) would be used such as a, B C. Pipe at the scorecard: 1 I got some industry intel to help me understand. Feb 21, 2016 # 1 W. warm n00b answered the call by enabling gigabit.

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