Regarding the Gem port design principles, which of the following statements is incorrect?

Regarding the Gem port design principles, which of the following statements is incorrect?
A . Gem ports need to be planned under the same PON port, and Gem port IDs between PON ports can be repeated.
B. In FTTH mode, each user (ONU) is allocated a Gem port for each service flow.
C. In FTTB mode, for ordinary users, it is recommended to allocate Gem ports on each ONU according to the outer VLAN of the service flow, and each Gem port corresponds to a maximum of 1024 VLANs.
D. In FT TB mode, for important broadband leased line users, it is recommended that each broadband leased line user corresponds to a Gem port.

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Answer: C