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fiber to the home skip to main skip to sidebar fiber to the home gigabit data downloading clear video conference hdtv movie on demand etc and for sure that all possible with fiber to the home ftth friday march 6 2009 gepon epon epon ethernet passive optical networks or gepon gigabit ethernet passive optical networks also known as ethernet pon is an ieee efm standard for using ethernet for packet data as defined in ieee 802 3ah it defines how ethernet can be transmitted over new media types and in our context point to multipoint fiber epon gepon is a fast ethernet over passive optical networks which are point to multipoint fiber to the premises fttp fiber to the home ftth architecture in which single optical fiber is used to serve multiple premises or users a pon architecture consists of an optical line termination olt on the provider s side and one or many optical network units onu on the users side this type of architecture is always better than the point to point ones these are fast replacing existing technologies as dsl or cable modems as epon gepon are capable of providing bandwidths of up to 1 gigabit and beyond and also serve multiple purposes at a time gepon or epon has been deployed widely in japan and provides for a symmetrical 1 0 gbps data rate in both directions upstream and downstream and is fast gaining momentum across the globe for obvious advantages for both providers and users alike gepon s biggest advantage is its use of native ethernet protocols also the economics of scale associated with ethernet components such as optical interfaces adds to it gepon or epon provides seamless connectivity for any type of ip based or other packetized ethernet communications as it employs a single layer 2 network that uses ip to carry data voice and video since ethernet devices are present everywhere from home network to regional national and worldwide backbone networks implementation of epons has proved to be cost effective also it provides secure communication as encryption is provided in both ends i e upstream and downstream so the chances of eavesdropping fade away as the transfer rates in ethernet scale up by the day the scalability of epon gepon is limitless and so is the flexibility of adnet gepon devices where we have a variety of products to choose from of the many advantages to offer some are worth to notice with the gepon epon standard there is no limit on the number of onus remember these are the units on the users side gepon epon requires a single management system which means gepon epon results in a significantly lower total cost of ownership epon also does not require multi protocol conversions 0 comments wednesday march 4 2009 fttx network basics the fttx architecture consists of a passive optical network pon that allows several customers to share the same connection without any active components i e components that generate or transform light through optical electrical optical conversion a feeder fiber is brought from an optical line terminal olt in the co to a fiber distribution hub fdh near a group of customers from that point a passive splitter is used to typically connect up to 32 or 64 customers to the same feeder fiber then each customer premises is provided with an optical network terminal ont connected to each splitter branch this point to multipoint architecture dramatically reduces network installation management and maintenance costs as shown by the figure below the olt provides voice and data downstream transmissi on using a 1490 nm wavelength band while the ont provides upstream transmission with a 1310 nm wavelength band allowing for bidirectional transmission on the same fiber without the signals interfering with one another in addition the olt may be connected to a wavelength division multiplexing wdm coupler to provide video together with voice and data triple play services over a single fiber the video is provided in the downstream direction only usually in a 1550 nm wavelength band traditional analog video 3 comments older posts home subscribe to posts atom more about ftth sponsored by blog archive 2009 7 january 2 february 2 march 3 coppers vs fiber optics fttx network basics gepon epon followers class class