GPON device coverage radius 20km

GPON (Gigabit Passive Optical Networks) is an Optical System for the Access Networks, based on ITU-T specifications G. It can provide a 20 km reach with a 28dB optical budget (shown in the following illustration) by using class B+ optics with 1:32 split ratio. The GPON ONU SFP transceiver provides an asymmetric 1. 488Gbps downstream, reaching a link up to 20km over SMF via SC connector. It is fully compliant with SFP MSA, ITU-T G. 2, IEC-60825 and is ideal for asymmetric passive optical network (GPON) system. Recommended. One of the big gotchas when designing PONs is that all of your ONTs must be within 20km of each other for timing reasons. You can have your cluster of ONTs as far away from the OLT as you want though, provided the light level received at both the ONT and OLT is within your optical budget. When connected to OLTs, it supports a 1:128 splitting ratio. [pdf]