ATM and Broadband PON (APON and BPON)

APON and BPON were the first passive optical network standards, using ATM to carry traffic.

What is ATM and Broadband PON (APON and BPON)?

BPON (ITU-T G.983) offered up to 622 Mbit/s downstream. Both were superseded by GPON and EPON.