Exclusive: V2.03.74r

: Ensure your specific V1600D model (e.g., V1600D-DP) is compatible with the "R" series firmware branch.

: Ensure the firmware file hasn't been corrupted during download. v2.03.74r

Focused on ONU management and MAC address authentication fixes. : Ensure your specific V1600D model (e

: It resolved an issue where the DHCP relay would occasionally fail to process response packets, which previously caused intermittent connectivity issues for end-users. v2.03.74r

: Fixed an incorrect configuration scope for WiFi channels, ensuring that the OLT could properly push wireless settings to downstream ONT units without errors. 3. Historical Context: The v2.03.xx Evolution