PON (Passive Optical Network) refers to an optical access network in which the ODN (Optical Distribution Network) between the OLT (Optical Line Terminal) and the ONU (Optical Network Unit) all uses passive equipment.
PON is a point-to-multipoint (P2MP) optical access system, which can save fiber resources, ODN does not require power supply, user access is convenient, and supports multi-service access. It is a broadband fiber access technology that operators are currently vigorously promoting , There are mainly two technologies, EPON and GPON.
The PON system uses WDM (Dense Wavelength Division Multiplexing) technology to achieve single-fiber bidirectional transmission.
In order to separate the incoming and outgoing signals of multiple users on the same fiber, the following two multiplexing technologies are used:
●The downstream data stream adopts broadcasting technology;
●Upstream data flow adopts TDMA technology.
●Each PON port can achieve a maximum transmission speed of 1.25G upstream and 2.5G downstream
