Huawei SmartAX MA5600T Hardware Description page 637

SmartAX MA5600T/MA5603T/MA5608T Multi-service
Access Module
Hardware Description
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Issue 24 (2018-07-30)
board. After being processed by the control board, the IP packets are transmitted
upstream to the upper level device through the optical or electrical port.
In the downstream direction, the forwarding logical decapsulates the IP packets from the
Ethernet, performs CAR on the IP packets, reorganizes the IP packets into ATM/PTM
packets, and transmits the ATM/PTM packets to the interface module. The interface
module converts the ATM/PTM packets into analog signals and transmits the signals to
subscriber lines.
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