Hello, Corey_1.
The control boards of the MA5616 support the following types of upstream daughter boards:
1. The H831CCUB control board supports the following upstream daughter boards: GP1A, EP1A, and GE1A.
2. The H831CCUC control board supports the following upstream daughter boards: UP2A, UP2C, and XP1A.
3. The H831CCUD control board does not have an independent upstream daughter board or voice daughter board. The upstream module and voice module are integrated on the mother board.
4. The H831CCUE control board supports the following upstream daughter boards: UP2A, UP2C, and XP1A.
Hope it helps you.
Thank you!