Huawei SmartAX MA5600T Hardware Description page 608

SmartAX MA5600T/MA5603T/MA5608T Multi-service
Access Module
Hardware Description
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The service process is as follows:
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Issue 24 (2018-07-30)
– In the downstream direction, the forwarding module transmits the ATM cell flow to
the interface module. Then, the interface module converts the flow into downstream
line signals.
The forwarding module processes services. The detailed process is described later.
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 splitter module separates POTS signals from ADSL2+
signals over the subscriber cable, and then the interface module transmits such signals to
the forwarding module. The forwarding module reorganizes the cell flow into ATM
packets, encapsulates the ATM packets into IP packets, and then performs CAR on the IP
packets. Controlled by the logical switch, the IP packets are transmitted to the backplane
bus through the backplane interface.
In the downstream direction, the forwarding module decapsulates the IP packets from the
backplane bus, performs CAR on the IP packets, reorganizes the IP packets into ATM
packets, and then transmits the ATM packets to the interface module. The interface
module converts the ATM packets into analog signals and transmits the signals to the
subscriber line through the splitter module.
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