next generation PON (NG-PON)
NG-PON is the new generation of passive optical networks (PON), which are divided into several development phases: NG-PON1, which has the designation XG-PON1, and NG-PON2.
The NG-PONs were designed by ITU-T and Full Service Access Network( FSAN) as low-cost systems with high data rates, full service and interoperability with existing technologies. In addition, other transmission technologies besides time division multiplexing(TDM) were considered. In terms of compatibility, NG-PON1 is an upgrade that is compatible with Optical Distribution Networks( ODN) based on GPON.
As for the data rates of NG-PON1, they are 10 Gbit/s downstream and 2.5 Gbit/s or 5 Gbit/s upstream.