10 G PON access system will become the mainstream for Gigabit services over FTTH program.Enabling the current GPON system’s smooth upgrade to XG PON by re-using infrastructure of dark fibre is of great significance to reduce the dark fiber occupancy

improve the efficiency of upgrading

simplify the user data configuration.In the context of China Mobile Group

for the first time in the real environment of the current network

multi solutions of the GPON smooth upgrade to XG PON were deliberately tested and evaluated.Based on the measured testing results to demonstrate the advantages and disadvantages

each solution was assigned to different application scenarios

each typical application scenario was given clear upgrade program recommendations.It is estimated that through such tests and verifications

followup work on the upgrades from GPON to XG PON will have reference cases.Finally

recommendations were given for the next phase of the upgrade.