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PON,BPON,GPON,EPON,GEPON,10G-EPON,WDM-PON, which one are you using now? Is the  FTTH available  in your home now?

curtis

Though PON is not the newest topic in the world, I think some concepts should be clarified. What's the main diffirences among PON, BPON, GPON, EPON, GEPON, 10G-EPON, WDM-PON? Which one is mainly used in your country? Have  FTTH been widely used in your country? How about the cost of your FTTH?

  • PON( passive optical network) is a point-to-multipoint, fiber to the premises network architecture in which unpowered optical splitters are used to enable a single optical fiber to serve multiple premises. A PON consists of an Optical Line Terminal (OLT) at the service provider's central office and a number of Optical Network Units (ONUs) near end users. A PON configuration reduces the amount of fiber and central office equipment required compared with point to point architectures.

    BPON (Broadband PON) is a standard based on APON. It adds support for WDM, dynamic and higher upstream bandwidth allocation, and survivability. It also created a standard management interface, called OMCI, between the OLT and ONU/ONT, enabling mixed-vendor networks.

    GPON (Gigabit PON) is an evolution of the BPON standard. It supports higher rates, enhanced security, and choice of Layer 2 protocol (ATM, GEM, Ethernet).

    EPON or GEPON (Ethernet PON) is an IEEE/EFM standard for using Ethernet for packet data. 802.3ah is now part of the IEEE 802.3 standard.

    10G-EPON (10 Gigabit Ethernet PON) is an IEEE Task Force for 10Gbit/s, backward compatible with 802.3ah EPON. 10GigEPON will use separate wavelengths for 10G and 1G downstream. 802.3av will continue to use a single wavelength for both 10G and 1G upstream with TDMA separation. It will also be WDM-PON compatible (depending on the definition of WDM-PON). It is capable of using multiple wavelengths in both directions.

    WDM-PON,Wavelength Division Multiplexing PON,is that uses multiple optical wavelengths to increase the upstream and/or downstream bandwidth available to end users. WDM-PON can provide more bandwidth over longer distances by devoting more raw optical bandwidth to each user, and by increasing the link loss budget of each wavelength, making it less sensitive to the optical losses incurred at each optical splitter.The multiple wavelengths of a WDM-PON can be used to separate Optical Network Units (ONUs) into several virtual PONs co-existing on the same physical infrastructure. Alternatively the wavelengths can be used collectively through statistical multiplexing to provide efficient wavelength utilization and lower delays experienced by the ONUs.

     

    all the BPON,GPON,EPON,GEPON products and service are available now ,but the standard and prouct of 10G-EPON,WDM-PON is under development.

     

    Meanwhile,using PON technology to realize FTTH had been accepted widely .It had been widely used in Japan and Korea ,but it is not so popular for US and EU .In China,for the cost and policy issue, FTTH has not been widely used.