The best DOCSIS 3.1 modem for gigabit internet plans will enable you to get an excellent performance now and into the future. If you look at fiber objectively from any other perspective it outperforms DOCSIS. [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. G.PON and N.GPON 2 offer OSS supporting DOCSIS provisioning (Open Link Cable) and vendors like Calix offer sealed OLTs, powered via Coax for distributed outdoor deployments allowing replacements of micro … It offers faster downloads speeds on the coaxial cable as compared to fiber cable. With the introduction of DOCSIS 3.1, this all changes. DOCSIS has made incremental improvements over time, but has never been able to compete head-to-head with fiber. Once upon a time, when DOCSIS was created, it had one mission: To move IP data over cable’s hybrid-fiber coax (HFC) networks. If your ISP offers internet packages of over 1Gbps, then a Docsis router a worthy investment for you. The question for cable operators that already have HFC networks is how to know when they should invest in the current HFC network vs. deploying fiber all the way to the home. DOCSIS 3.1, DOCSIS 4.0, point-to-point coherent optics, PON, and advanced wireless technologies will all enable 10G speeds. [2] The biggest expense with fiber is running the subscriber drop. Any estimates of cost per sub to upgrade to Docsis 3.1? Save my name, email, and website in this browser for the next time I comment. There are a few different types of modems. Data Over Cable Service Interface Specification (DOCSIS) is a long way to say “how cable Internet works.” DOCSIS 1.0 was developed by Cable Labs in 1997, and it’s been under development since, getting faster and more power-efficient with each incarnation.. Fiber, and specifically GPON, has fewer moving parts than DOCSIS or RFoG. 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) The cost to install new fiber is on parity with coax. Should we therefore abandon DOCSIS? One of the other essential facts about DOCSIS 3.1 is that it is backward compatible. Cost of deployment is where coax has a huge advantage over fiber. Until now, providers have added fiber to new parts of the plant and tried to make the most of DOCSIS over existing cable networks. The TCO model introduced here confirms and quantifies that perceived benefit and points out that for network densification, there is a business case to pursue the indoor femtocell use case where market conditions are favorable. Stay SAFE! This is the dream of every home. This is the key differentiator for DOCSIS technology vs. fiber, where most of the backhaul connections require either new build or premium lease rates. So I got some industry intel to help me better understand the differences. To make the latest gigabit fiber internet to work, you need a DOCSIS 3.1 gigabit cable modem. DOCSIS 3.1 Modem vs 3.0 Speeds and Testing. 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 … This would give us: That exceeds our 10G initiatives. The limited speeds are because not everyone has adapted to DOCSIS 3.1. Both cable operators and telecom operators can deploy fiber and are doing so today. FTTH is a Point to MultiPoint (P2MP) network architecture, DOCSIS 3.1 is a transport mechanism. It boils down to this: When DOCSIS was created, Ethernet didn’t have many of the “convergence-friendly” attributes it has now. DOCSIS 3.1 has ten times more speed than DOCSIS 3.0. 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. Your email address will not be published. The middle is DOCSIS. DOCSIS 4.0 was designed to hit downstream speeds of up to 10 Gbps, which is twice the download speed of DOCSIS 3.1, and an upstream of up to 6 Gbps (quadruple the DOCSIS … From the technical side, let’s look at the raw capability of fiber and today’s DOCSIS 4.0 technologies. Reliability: Fiber wins 4. 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. 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. In the past, DOCSIS speeds have been slow compared to pure Ethernet speeds. This often translates directly into more satisfied customers. Check out past issues of the award-winning Broadband Library! It is a DOCSIS 3.0 modem with an inbuilt AC1600 dual-band Wi-Fi … 35 A typical fiber-optic cable has around 10,000 times more usable bandwidth than a typical coaxial cable. Data-Over-Cable Service Interface Specifications (DOCSIS) was already in development which enabled the cable industry to provide high speed data and later voice-over-Internet protocol (VoIP). It would bankrupt most if not all cable operators. However, it does not support cable digital voice service. market. DOCSIS is delivered on coaxial cable. In a more typical situation where multiple QAMs are being used at the same time, DOCSIS 3.1 is still able to achieve 8.5 bits/Hz – making it 35% more efficient without changing the HFC plant. We allocated 20% of DOCSIS network upgrade (from low split to mid split) cost to DOCSIS network-based use cases (scenarios 2 and 3). Fiber may be faster, but it is available only in limited areas, and DSL may be having range, but it is often quite slow. 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. DOCSIS 3.1 is the current modem technology. So, if you are in the market to buy a new modem, then why not buy a modem that is future proof. 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. So, first of all, let’s clarify that this should not be a question of FTTH – Fiber To The Home vs. DOCSIS 3.1 Cable Technology. DOCSIS lies between these 2, as it is faster than DSL but slower than Fiber technology. Although OFDM is much more complex that this, the main point is that OFDM can change the profiles in real-time to optimize modulations to the best parts of the plant – dramatically increasing speed and throughput. Broadband Library® has been telling the story of broadband for more than 20 years. For EuroDOCSIS it’s 6.952 Msym/s for both 64-QAM and 256-QAM. 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. Cost: DOCSIS wins 3. DOCSIS 3.1 is expected bring many things to the cable operator's table, including increased capacity and more robust modulation. DOCSIS 4.0 enables this competition by providing a 10 Gbps pipe. Your email address will not be published. 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. 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. 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. One of the main changes to DOCSIS 3.1 is orthogonal frequency domain multiplexing (OFDM). OFDM and profiles are much more complex than we can describe in a single blog post. Again, most homes already have the coax drop in place. For a quick overview of how DOCSIS 3.1 works, this infographic is a great place to start. So I got some industry intel to help me better understand the differences. 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