fiberstore white paper-delivering gigabit ethernet with g.fast
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WHITE PAPER
Fiberstore White Paper | Delivering Gigabit Ethernet With G.fast
The demand for higher data rates is continuously increasing driven by the applications like CloudComputing, Big Data and Internet of Things. Meanwhile, the strong market competition makes thenetwork operators to improve the network architecture and deliver high speed services. Pure fibernetwork should be the best solution. There is no wonder that the fiber network is the trend of thefuture and it is gradually extended closer to users during the transition from copper-based accessnetworks to pure fiber networks. However, it is not favorable to connect the fiber directly to thecustomer premises and the cost is high in some cases, like old buildings. To find the fast andcost-effective way to deliver Gigabit speed Ethernet, copper access technology is being applied insome cases. This technology is known as G.fast.
G.fast and FTTdp
G.fast, based on the latest VDSL technology including cross talk cancellation and re-transmission, isdesigned for use in a ‘last-mile’ of less than 250 meters. Combining the advantages of fiber opticaccess technology and copper access technology, G.fast can deliver data at fiber speed to thecustomers using telephone copper wires.
The problem with G.Fast is that its ultra-fast speeds only work over very short distances. To shortenthe copper distance, FTTdp is usually applied with G.fast. “dp” here stands for “distribution point”.This solution brings the fiber optic cable out of street cabinets and moves it closer to home via thedistribution point. The following network diagram shows the difference of FTTH and FTTdp usingG.fast. The blue lines represent fiber optic cable, the red ones represent copper wire.
Delivering GigabitEthernet With G.fast
WHITE PAPER
Fiberstore White Paper | Delivering Gigabit Ethernet With G.fast
G.fast Shifts the Limits of Copper
It seems that there is no need for copper access in building a FTTx connection. But in practice,connecting the fiber directly to the customer premises causes some disadvantages which can besolved by G.fast.
There might be many difficulties when deploying fibers to the user homes, especially some existingbuildings. Sometime it is even not possible to deploy fibers to the user homes. In addition, mostin-house telephone installations still rely on copper cables for most existing and newly constructedbuildings because fibers are expensive and difficult to handle. There is no need to deploy fiber opticcable in building and home when delivering Gigabit Ethernet with G.fast.
The fiber optic based customers premises equipment (CPE) are usually installed by technician.Compared with fiber optic connections, copper-based CPE installation is simple. Just connecting theCPE to the telephone plug with the delivered cable would finish the installation, which can beinstalled by customer. Thus, G.fast can save the cost for new users and makes the home installationmuch easier.
Optical fibers can be broken or have transmission loses when wrapped around curves and opticalfibers require more protection around the cable compared to copper. What’s more, the faultlocation from the CPE is not easy. It would cost more to maintain the fiber connections comparedwith copper connections achieved by G.fast.
G.fast Paves the Way to FTTH
At first glance, G.fast is limiting the transmission from copper to fiber. Actually, G.fast acceleratesthe deployment of fiber optic networks. It cost a lot of time and money to process the paperworkand get permission of the subscriber before deploying the fiber optic cable. The processing iscomplicated. Hardware foundation is the main advantages of G.fast which eliminates the need torewire the whole building and still allows a noteworthy uplift in access speeds. Copper iseverywhere in telecommunication network. The hybrid copper/fiber approach—G.fast making fulluse of the telephone wires in the buildings actually makes the customers closer to optical fibers intime save and cost save manners. In this way, the transmission from copper to fiber is actually beingpromoted by G.fast.
Weighing time, broadband speed and cost, operators figure out that applying G.fast in FTTH is aneconomical and time-saving way to bring Gigabit speed Ethernet to the users. To capture marketshare of broadband service, some network operators are considering to use G.fast. Alcatel-Lucentand communications services company BT have already started a consumer trial of G.fasttechnology in Gosforth (situated in North-Eastern England), for offering ultra-broadband access toconsumers.
WHITE PAPER
Fiberstore White Paper | Delivering Gigabit Ethernet With G.fast
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Notice: This document is for informational purposes only and does not set forth any warranty, expressed orimplied, concerning any equipment, equipment features, or service offered or to be offered by Fiberstore.Fiberstore reserves the right to make changes to this document at any time, without notice, and assumes noresponsibility for its use. This information document describes features that may not be currently available.Contact a Fiberstore sales team for information on feature and product availability.
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