SHEB ( 32 port SHDSL Card)

Description

The SHEB board is a 32-channel SHDSL.bis service board. Provides SHDSL.bis ATM/PTM access services and supports Line Protection

This card can be installed in slots 0-6 and 9-15 of the MA5600 service shelf or in slots 1-6 of the MA5603

The basic working principles of the SHEB 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

The services are processed as follows

• In the upstream direction, the interface module converts the line signals into a cell flow, aggregates the flow to the forwarding module, and then reassembles the cell flow into ATM packets. The forwarding module encapsulates the reassembled ATM packets and performs committed access rate (CAR) on the packets. Then, the packets are transmitted to the backplane bus through the backplane port and then to the control board. After the packets are processed by the control board, they are transmitted to the upper layer device through the optical or electrical port.
• In the downstream direction, the forwarding module re-encapsulates the data from the Ethernet, reassembles the packets into the ATM packets after the CAR processing after CAR processing, and then transmits the data to the interface module. The interface module converts the data into analog signals, and then transmits the analog signals to the subscriber line