The networking of EPON system is flexible and diverse, as long as the optical attenuation at the final ONU is guaranteed to be above the optical receiving sensitivity of ONU. Generally support 1:2 and 1:16 splitters, 1:4 and 1:8 splitters two-stage connection. 5:95 and 5:95 splitters can support multi-level connection, but multi-level connection will cause greater optical interpolation loss, more failure points, difficult maintenance and location, please consider according to the actual situation. Generally, the first-order spectroscopy is recommended.

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