Recent developments in PON systems standards in ITU-T

摘要

Recommendations for Broadband Passive Optical Networks (B-PON) and Gigabit Capable Passive Optical Networks (G-PON) are now reaching maturity in ITU-T. Many vendors are offering conformance with the B-PON series of standards and products with G-PON conformance are emerging. These systems typically operate over a maximum 20 km, 32-way split optical distribution network. The capacity of B-PON ranges from 155/155 Mbit/s symmetrical to 1240/620 Mbit/s asymmetrical transmission. G-PON extends this capacity to 2.4/2.4 Gbit/s and allows more efficient transmission of Ethernet. This paper presents an update on the status of standards on passive optical networks systems with emphasis on recent developments in Q.2/15 of ITU-T.