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Anonymous users2024-02-06Ethernet passive optical networks? It's almost there.
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Anonymous users2024-02-05EPON adopts the transmission format of Ethernet and is also the mainstream technology of user LAN and resident network, and the two have natural integration, eliminating the cost factor caused by complex transmission protocol conversion; Using single-fiber wavelength division multiplexing technology (downlink 1490nm, uplink 1310nm), only one backbone fiber and one OLT are required, and the transmission distance can reach 20 kilometers. On the ONU side, it is distributed to up to 32 users through optical splitters, so the cost pressure on OLT and backbone fiber can be greatly reduced. The uplink and downlink are all gigabit speeds, the downlink uses encrypted broadcast transmission for different users to share the bandwidth, and the uplink uses time-division multiplexing (TDMA) to share the bandwidth. High-speed broadband fully meets the bandwidth needs of access network customers, and can dynamically allocate bandwidth according to changes in user needs in a convenient and flexible manner. The point-to-multipoint structure only needs to increase the number of ONUs and a small number of user-side optical fibers to easily expand and upgrade the system, fully protecting the operator's investment. EPON has the ability to transmit TDM, IP data and broadcast at the same time, in which TDM and IP data are transmitted in the format of IEEE Ethernet, supplemented by a carrier-class network management system, which is enough to ensure the transmission quality.
Hope mine is helpful to you! Pro-3
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Anonymous users2024-02-04The main devices in the EPON network are:
OLT and ONU
oltoptical
lineterminal
Optical cable terminal equipment), located in the central computer room, equivalent to a switch, and the downlink is connected to each ONU through the PON port of the OLT. The uplink is connected to the core switch through the Gigabit Ethernet port.
onu(optical
network
unit) optical node, located in the residential building, downlink through the five types of lines is to the user, equivalent to the optical transceiver. Or downlink to EOC (Ethernet power transfer signal equipment used in radio and television broadband, uplink and downlink signals can be mixed into the coaxial cable of cable TV transmission for transmission).
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Anonymous users2024-02-03The main function of EPON is to convert optical signals into point signals. Nowadays, there are many such devices, and with the development of the times, they now need stable and fast loans. The general device is an electrical port (convergence layer), and EPON only has an additional function to convert light into electricity.
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