Huawei SmartAX MA5600T Hardware Description page 690

SmartAX MA5600T/MA5603T/MA5608T Multi-service
Access Module
Hardware Description
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The service processing is as follows:
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Issue 24 (2018-07-30)
The forwarding module processes services. For details, see the description of service
processing.
The power module supplies power to other functional modules of the board.
The clock module provides the working clock for other functional modules of the board.
In the upstream direction, the splitter module separates LINE signals over the subscriber
line into POTS signals and VDSL2 signals, and then the interface module transmits these
signals to the forwarding module. The forwarding module reassembles the cell flow into
ATM/PTM packets, encapsulates the ATM/PTM packets into IP packets, and performs
CAR on the IP packets. Controlled by the logic 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 sent
from the backplane bus, perform CAR on the packets, reassembles the packets into
ATM/PTM packets, and then transmits the ATM/PTM packets to the interface module.
The interface module then converts the ATM/PTM packets into analog signals, and
transmits the analog signals to the subscriber line through the splitter module.
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