Cabletron Systems SEHI-22FL manual Connecting a UTP Segment to an EPIM-T, EPIM-T Crossover Switch

Page 36

Chapter 5: Connecting to the Network

5.1.2Connecting a UTP Segment to an EPIM-T

Before connecting a segment to the EPIM-T, check each end of the segment to determine if the wires cross over for proper connection. If the wires do not cross over, use the switch on the EPIM-T to internally cross over the RJ45 port. Figure 5-2 shows the pin assignment of the port according to the switch position.

Position X (crossed over)

1. RX+

5. NC

2. RX-

6. TX-

3. TX+

7. NC

4. NC

8. NC

Position =

(not crossed over)

1. TX+

5.

NC

 

2. TX-

6.

RX-

 

3. RX+

7. NC

 

4. NC

8. NC

1490_14

Figure 5-2 EPIM-T Crossover Switch

To connect an EPIM-T to a twisted pair segment:

1.Connect the segment to the module by inserting the RJ45 connector on the segment into the RJ45 port on the module. See Figure 5-2.

2.Check that the EPIM LNK LED is on. If the LED is off, perform each of the following steps until it is on:

a.Check that the device at the end of the segment is powered up.

b.Verify that the RJ45 connector on the twisted pair segment has the proper pinouts.

c.Check the cable for continuity.

d.Check that the twisted pair connection meets dB loss and cable specifications outlined in Chapter 3, Section 3.1.3.

e.Check that the crossover switch is in the correct position.

5-4

SEHI User’s Guide

Page 35 Page 37
Image 36
Page 35 Page 37
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 Using this Manual Chapter IntroductionDocument Conventions Following conventions are used throughout this documentGetting Help Related ManualsChapter Sehi Features and Options SEHI-22FLSehi Features Sehi OverviewStackable Capabilities Remote Network Management CapabilitiesOptional Features EpimChapter Installation Requirements Specifications Cable SpecificationsHubSTACK Interconnect Cable Requirements 2 10BASE-FL Fiber Optic Network Requirements3 10BASE-T UTP and STP Cable Specifications Network Port Specifications SEHI-22FL Network PortsCOM Port Requirements Transceiver RequirementsOperating Specifications Flash MemoryPower Supply Requirements Physical Specifications Environmental RequirementsAgency Approvals Chapter Installation Unpacking the SehiPRE-INSTALLATION Test Installing the SehiTabletop or Shelf Installation Tabletop or Shelf InstallationRackmount Installation Attaching the Strain-Relief BracketRack Mounting the Sehi Stacking the Sehi Inch RackStacking the Sehi Connecting the Sehi to the Power Source Disconnect SEH and Sehi Interconnect Cables at the OUT PortInstalling an Epim ADDING/REPLACING Epims Chapter Connecting to the Network Connecting the Sehi to the Network Connecting Network Ports Connecting to the Network Connecting the Sehi to the Network Connecting a UTP Segment to an EPIM-T EPIM-T Crossover SwitchConnecting 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 Connecting an AUI Cable to an EPIM-A Connect an EPIM-A to an external network segment as followsEPIM-A Connecting an AUI Cable to an EPIM-X EPIM-XFinishing the Installation Chapter Troubleshooting Installation CheckoutUsing Lanview Using Lanview Using the Reset Button Setting the Nvram Switch Chapter Local Management Local Management Keyboard Conventions Keyboard Conventions FunctionManagement Terminal Setup Console Cable Configuration Management Terminal Setup Parameters Accessing Local Management Sehi Local ManagementFeature Selection Screen Feature Selection ScreenCommunity Name Table Screen Community Name Table ScreenBASIC-READ Configuration Screen ConfigurationDisplays 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 EPIM-F3 Parameter Typical Minimum MaximumEPIM-C Figure A-4 EPIM-CEPIM-A and EPIM-X AUI Port Figure A-5 The EPIM-A and EPIM-XImage File Download Using OIDs Appendix BSetting UP a Unix Workstation AS a Tftp Server Standard Tftp Download Standard Tftp DownloadTable B-1 Standard Tftp Download Procedure Index NumericsIndex-2 Sehi User’s Guide Power Supply Cord
Top Page Image Contents