MC92501中文资料恩XP数据手册PDF规格书

Features:

Overview:

· OC-3 (155 Mbps) line rates (full duplex)

· Support for up to 16 PHY UTOPIA Level 2

on the PHY interface

· Supports 64K VCs

· Implements ATM layer functions for

broadband ISDN according to ANSI

recommendations, ATM Forum

specifications, and Bellcore

recommendations

UPC/NPC:

· Four bucket per connection GCRA (leaky

bucket algorithm)

· Either ingress or egress UPC/NPC

· Packet-based policing: partial packet discard

(PPD), early packet discard (EPD)

· Selective discard for CLP = 1 and CLP =

0+1 flows

· CLP transparency / significance mode

Operation, Administration, and Maintenance

(OAM):

· Fault Management

· Continuity Check and Loopback on

all connections

· Virtual Path (VP) and Virtual

Channel (VC) Alarm Surveillance

(AIS/RDI) on all connections using

an internal scan process to generate

and insert OAM cells

· Performance Management

· Performance Monitoring on all

connections

· Automatically performs PM block

test once the microprocessor initiates

block test request

Available Bit Rate (ABR):

· Supports Relative Rate ABR

· Supports changing RM cells’ priority by

marking the ingress switch parameters

Microprocessor Interface:

· Supports cell insertion / extraction using

direct access registers by the microprocessor

or by a DMA device

· Supports cell copying from the cell streams

using direct access registers to the

microprocessor or to a DMA device

· Provides indirect access to external memory

· Provides byte-swapping on cell payloads to

and from the microprocessor bus to support

both big-endian and little-endian buses

· Glueless connection to the MC68360

(QUICC), MPC860SAR and MPC860

Other Features:

· Configurable as a UNI (User-Network

Interface) or NNI (Network-Network

Interface)

· Uses external memory (up to 16 MB) to

provide context management for all

connections

· Supports point-to-multipoint operation on

egress cell flow

· Uses 3.3 V power supply

· IEEE 1149.1 (JTAG) boundary scan test

port

A p plications:

· ATM Core Switches

· ATM Edge Switches

· ATM Cross-Connects

· Multiservice Platforms

· Access Multiplexers