PON images

Passive Optical Networks

PONs provide a way to bring high-speed fiber networks closer to the customer in the local loop.

               BPON       GPON       EPON
               ITU-T      ITU-T      IEEE
               G.983      G.984      802.3
  Classes
  Supported    B,C       A,B,C       PX10, PX20**

  Downstream   155 Mbps  1.25 Gbps   1.25 Gbps
  Speeds       622 Mbps  2.5  Gbps

  Upstream     155 Mbps   155 Mbps   1.25 Gbps
  Speeds       622 Mbps   622 Mbps
                          1.25 Gbps
                          2.5  Gbps


   Maximum Number of ONTs
   Based on Class and Distance

   ODN CLASS    7 km    10 km    20 km

   Class A       16      13       6
   Class B       40      32      15
   Class C      101      81      39

  ** PX10 & PX20 are similar to B and C

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