Cabletron Systems manual Data Flow in the HSIM-W87, Features, Connectivity

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Chapter 1: Introduction

1.3DATA FLOW IN THE HSIM-W87

The T3 port receives the DS3 data through the coaxial interface. A T3 framer/Multiplexer strips off the T3 framing and provides 28 individual T1 data streams. The T1 data streams are then terminated by T1 framers, which provide an HDLC bit stream to the HDLC controller. The controller receives data packets from each of the bit streams and places them in a memory subsystem. An onboard CPU examines the packet and notifies the host of its arrival. Finally, a Cabletron proprietary ASIC transfers the data to the host platform.

This process is followed in reverse when a packet is transmitted from the host platform out the T3 port. The host platform notifies the HSIM-W87 when a packet is coming and transfers the packet to the memory. The HDLC format is applied to the data; then the data is framed to a T1 format, and passed to the framer/ Multiplexer. The T1 data is multiplexed with other T1 streams and is transmitted out through the T3 interface.

1.4FEATURES

Data Transfer Rates of 45 Mbps in full duplex, when running all 28 T1s carrying continuous data traffic of 128-byte packets or larger.

High-level Data Link Control (HDLC) protocol

T1 Inverse Multiplexing (IMUX)

WAN IP Priority Queuing functionality

DS1 Alarm Thresholds

SNMP support

DS1 and DS3 MIB Support

LANVIEW LEDs

1.4.1Connectivity

The HSIM-W87 module supports WAN technology using a DS3 interface, and supports 28 live full duplex T1 connections. The HSIM-W87 channelizes the T3 down to the DS1 level. The HSIM-W87 has an integrated M13 MUX.

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HSIM-W87 User’s Guide

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Contents HSIM-W87 Page HSIM-W87 User’s Guide Industry Canada Notice Cabletron Software Program License HSIM-W87 User’s Guide Contents Contents Using this Manual Chapter IntroductionImportant Notice Overview Imux Features Data Flow in the HSIM-W87Connectivity Hdlc Inverse Multiplexing Imux5 DS1 Alarm Priority QueuingSnmp and MIB Support Lanview Diagnostic LEDs Document ConventionsRelated Documentation Bold typeGetting Help Your email addressHSIM-W87 User’s Guide Chapter Installation Unpacking the HSIM-W87Installing the HSIM-W87 Installing the HSIM-W87 in an Interface ModuleInstalling the HSIM-W87 Installing the HSIM-W87 Installing the HSIM-W87 in a Standalone Device Connecting the HSIM-W87 to the Network HSIM-W87 SetupChapter Lanview LedsLanview LEDs Chapter Management Local ManagementManagement Network Tools Commands HelpCommand Built-in Commands ImuxExample Imux 1 -ac 1Command wanpq WanpqCommand ds1alarm Syntax ds1alarm Ds1alarmCommand dsx1 Command dsx3 Dsx1Dsx3 Special Commands SyntaxDescription OptionsSample Imux Configuration Imux 1 -ac 1Sample Imux Configuration Enabling the Imux Application Chapter Troubleshooting Troubleshooting the HSIM-W87Hardware Troubleshooting Status STS LED is OFF Investigating Software Configuration Problems Problems with the Firmware ImageHSIM-W87 User’s Guide Appendix a Specifications Physical PropertiesEnvironmental Requirements Regulatory Compliance Appendix B Typical Configuration Appendix B Typical Configuration Appendix C WAN Terms and Acronyms Appendix C WAN Terms and Acronyms WAN Terms and Acronyms HSIM-W87 User’s Guide WAN Terms and Acronyms HSIM-W87 User’s Guide