Huawei SmartAX MA5600T Hardware Description page 463

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 control module loads the board software, controls the running of the board, and
manages the board.
The protection module protects and isolates the board from lightning strikes.
The splitter module separates POTS signals from VDSL2 signals over the subscriber
line.
The broadband interface module converts the VDSL2 line signals into cell flows.
The broadband service processing module implements functions such as encoding/
decoding, analog-to-digital conversion, and line drive for VDSL2 services. It then sends
VDSL2 services to the forwarding module through the RGMII interface.
The narrowband interface module provides access to 64-channel narrowband service.
The narrowband service processing module encodes and decodes narrowband voice
services and converts analog signals into digital signals. It then sends narrowband voice
services to the forwarding module through the S3MII interface.
The forwarding module converts broadband signals and narrowband signals into
10GE/GE signals for upstream transmission through the backplane.
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 signals over the subscriber line
into POTS signals and VDSL2 signals. The broadband interface module then sends
VDSL2 signals to the broadband service processing module, and the narrowband
interface module sends POTS signals to the narrowband service processing module.
After that, signals from the broadband and narrowband service processing modules are
aggregated to the forwarding module. The forwarding module reassembles the cell flow
into PTM packets, encapsulates the 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 GE or 10GE interface.
In the downstream direction, the forwarding module decapsulates the IP packets sent
from the backplane bus, performs CAR on the packets, reassembles the packets into
PTM packets, and then transmits them to the broadband and narrowband service
processing modules. The interface module then converts the PTM packets into analog
signals, and transmits the analog signals over the subscriber line through the splitter
module.
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