کارت SHDSL مدل SHEB

توضیحات

برد SHEB یک برد سرویس 32 کاناله SHDSL.bis است. خدمات دسترسی ATM/PTM SHDSL.bis را ارائه می دهد و از Line Protection پشتیبانی می کند.

این کارت را می توان در شیارهای 0-6 و 9-15 شلف سرویس MA5600 یا در شیارهای 1-6 MA5603  نصب کرد.

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.