Cabletron Systems SEHI-22FL manual Operating Specifications, Flash Memory

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Chapter 3: Installation Requirements and Speciﬁcations

3.5OPERATING SPECIFICATIONS

The operating speciﬁcations for the SEHI are described in this section. Cabletron Systems reserves the right to change these speciﬁcations at any time without notice.

System Speciﬁcations
Operating System Memory:	1.5 MB
Internal Processor:	Intel i960 operating at 16 MHz
Ethernet Controller:	National Semiconductor DP83916
Non-Volatile RAM:	32 KB with battery back-up
EPROM:	64 KB
FLASH MEMORY:	1 MB
Delay Time (Start of Packets) Speciﬁcations
Twisted Pair to EPIM-A:	1.10 ms
Twisted Pair to Twisted Pair:	1.00 ms
EPIM-A to Twisted Pair:	1.00 ms
Delay Times (JAM) Speciﬁcations
Twisted Pair to EPIM-A:	960 ns
Preamble Speciﬁcations
Input:	Minimum of 40 bits required
Output:	64 bits min. (last 2 bits are 1,1)

3-6	SEHI User’s Guide

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Contents SEHI-22FL Intelligent Stackable HUB USER’S Guide Sehi User’s Guide FCC Notice Cabletron SYSTEMS, INC. Program License Agreement United States Government Restricted Rights Contents Contents Sehi User’s Guide Vii Chapter Introduction Using this ManualFollowing conventions are used throughout this document Document ConventionsRelated Manuals Getting HelpSEHI-22FL Chapter Sehi Features and OptionsSehi Overview Sehi FeaturesRemote Network Management Capabilities Stackable CapabilitiesEpim Optional FeaturesCable Specifications Chapter Installation Requirements Specifications2 10BASE-FL Fiber Optic Network Requirements HubSTACK Interconnect Cable Requirements 3 10BASE-T UTP and STP Cable Speciﬁcations SEHI-22FL Network Ports Network Port SpecificationsTransceiver Requirements COM Port RequirementsFlash Memory Operating SpecificationsPower Supply Requirements Physical Specifications Environmental RequirementsAgency Approvals Unpacking the Sehi Chapter InstallationInstalling the Sehi PRE-INSTALLATION TestTabletop or Shelf Installation Tabletop or Shelf InstallationAttaching the Strain-Relief Bracket Rackmount InstallationRack Mounting the Sehi Inch Rack Stacking the SehiStacking the Sehi Disconnect SEH and Sehi Interconnect Cables at the OUT Port Connecting the Sehi to the Power SourceADDING/REPLACING Epims Installing an EpimChapter Connecting to the Network Connecting the Sehi to the NetworkConnecting Network Ports Connecting to the Network Connecting the Sehi to the Network EPIM-T Crossover Switch Connecting a UTP Segment to an EPIM-TConnecting a Fiber Segment to an EPIM-F1/F2/F3 Sehi User’s Guide EPIM-F1, EPIM-F2, and EPIM-F3 Connecting a Thin Coaxial Segment to an EPIM-C Connect an EPIM-A to an external network segment as follows Connecting an AUI Cable to an EPIM-AEPIM-A EPIM-X Connecting an AUI Cable to an EPIM-XFinishing the Installation Installation Checkout Chapter TroubleshootingUsing Lanview Using Lanview Using the Reset Button Setting the Nvram Switch Chapter Local Management Keyboard Conventions Function Local Management Keyboard ConventionsManagement Terminal Setup Console Cable Conﬁguration Management Terminal Setup Parameters Sehi Local Management Accessing Local ManagementFeature Selection Screen Feature Selection ScreenCommunity Name Table Screen Community Name Table ScreenBASIC-READ Configuration Configuration ScreenDisplays the IP address of the Sehi Setting the IP Address Setting the Default Gateway Trap Table Screen Trap Table ScreenTrap Table Screen Snmp Tools Screen Snmp Tools ScreenAllows the user to retrieve MIB objects using Snmp protocol Getting Individual OIDs Viewing Multiple OIDs Device Statistics Screen Device Statistics ScreenFollowing sections describe Device Statistics screen ﬁelds This command lets the user enable the selected port Port Using the Disable Port Command Epim Specifications Appendix a Epim InformationEPIM-T EPIM-F1 and EPIM-F2 Parameter Typical Minimum Maximum EPIM-F3Figure A-4 EPIM-C EPIM-CFigure A-5 The EPIM-A and EPIM-X EPIM-A and EPIM-X AUI PortAppendix B Image File Download Using OIDsSetting UP a Unix Workstation AS a Tftp Server Standard Tftp Download Standard Tftp DownloadTable B-1 Standard Tftp Download Procedure Numerics IndexIndex-2 Sehi User’s Guide Power Supply Cord