RAD Data comm operation manual Functional Description, RIC-155 Block Diagram

RIC-155Installation and Operation Manual Chapter 1 Introduction

1.3 Functional Description

This section contains functional descriptions of the RIC-155 circuit blocks, shown in Figure 1-3.

Main Card

MDIO/MDC Interface

Management

	Ethernet
Ethernet	Network
Network	Interface

CPU

Forward MII

Parallel CPU Interface

	POS Level 2t
CPLD	Interface	SDH/SONET
		Framer

Fiber Optic/

Electrical

Interlace

SDH/SONET

Link

Power

Supply

Figure 1-3. RIC-155 Block Diagram

•Ethernet network interface supports interfacing with Ethernet network. The Ethernet interface is based on a multiport Fast Ethernet bridge with quality of service support. The ports of the Fast Ethernet bridge perform the following functions:

Data transmission over SDH/SONET link

Management from the local terminal

Interconnection between bridge and CPU

MAC MII configuration.

•CPLD is a high performance lattice programming device responsible for:

Interfacing between MII port of the Fast Ethernet bridge and Level 2 POS interface of the SDH/SONET framer

Providing MUX functions of SNI CPU interface Providing parallel CPU interface

Managing front panel LEDs.

Functional Description 1-5