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Introduction

This section describes the architecture of the equipment and the architecture and

function of the option cards.

Block diagram

The different functions provided by the main board are (see next figure):

• Microprocessor and control circuits.

The microprocessor and control circuits manages the different elements of the

board, the interfaces (F-interface, LAN-Q) and the LEDs

• Two STM-N (N=1 for 1643 AM; N=1 or 4 for 1643 AM) optical aggregate

interfaces. One interface is referred to as the "LP1", while the other the "LP2".

In case of MSP protection (STM-1 only), LP1 is the "working" side and LP2 the

"protection" side.

• STM-4 Line Interface used in STM-4 applications:

– In the transmit direction, the STM-4 Line Interface performs the collection of

– In the receive direction, the STM-4 Line Interface performs the STM-4

• The Higher Order (HO) Cross-connect function is dedicated to STM-4 applications:

A single VC4 is accessible in add/drop mode. The three others are fully flexible

cross connected to the other side.

The HO Cross-connect also performs DCC processing.

• The Lower Order Cross-connect contains 32 E12 assemblers and disassemblers.

• HDB3 drivers and receivers are dedicated to the sixteen 2 Mbit/s interfaces of the

board.

4-10

four AU4s and the STM-4 assembly. It performs RSOH/MSOH insertion

disassembly, the RSOH/MSOH extraction, the management of the four AU4s

and the regeneration of data transmitted to the Higher Order (HO

Cross-connect).

Alcatel-Lucent - Proprietary

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365-312-801R7.2

Issue 3, May 2007

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System Architecture - Alcatel-Lucent 1643 AMS Applications And Planning Manual