The ADEF/ADBF board is a 64-channel ADSL2+ service board. The ADEF board supports ADSL2+ over POTS services, and can work with the SPLF board. The ADBF board supports ADSL2+ over ISDN services, and can work with the SPLH board. The ADEF/ADBF board can be installed in slots 0-6 and 9-15 of the MA5600 service shelf, and slots 1-6 of the MA5603 service shelf. External connections of the ADEF/ADBF board: Working principles of the ADEF/ADBF board: The basic working principles of the ADEF/ADBF board are as follows: * The control module loads the board software, controls the running of the board, and manages the entire board. * The power module supplies power to each functional module of the board. * The clock module provides clock signals for each functional module of the board. * In the upstream direction, the interface module converts the ADSL2+ signals into a cell flow, aggregates the flow to the forwarding module, and then reassemble...
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