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3Com 5000 E1 interface to DSU/CSU, 75Ω unbalanced coax cable, 120Ω balanced twisted pair cable

Models: 5000

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E1 interface to DSU/CSU

40Chapter 2: Installation

E1 interface to DSU/CSU

Introduction to the E1 interface E1 interface, which stands for channelized CE1/PRI interface, is responsible for forwarding and processing E1 data flow, delivering CE1 access and implementing ISDN PRI function. Its attributes are listed in the following table:

Table 17 E1 interface attributes

Attribute	Description

Connector type	DB15
Interface standard	G.703, G.704
Maximum baud rate	2.048Mbps
Matching cable	E1 75Ω unbalanced coax cable
	E1 120Ω balanced coax cable
	Coax connector, network interface connector,
	75Ω−120Ω converter (with BNC connector)
Operating mode	E1, CE1, ISDN PRI
Function	Backup
	Terminal access
	ISDN PRI

E1 interface cable E1 interface cable, which is G.703-compatible, may be 75Ω unbalanced coax cable or 120Ω balanced twisted pair cable.

■75Ω unbalanced coax cable

Figure 27 E1 75Ω unbalanced coax cable

You can also choose to attach both ends with BNC connectors, for extending two 75Ω unbalanced coax cables.

■120Ω balanced twisted pair cable

Image 40

3Com 5000 E1 interface to DSU/CSU, 75Ω unbalanced coax cable, 120Ω balanced twisted pair cable, Attribute, Description

Contents

3Com Router 5000 Family Getting Started Guide3Com Corporation 350 Campus Drive Marlborough MA UNITED STATES GOVERNMENT LEGENDENVIRONMENTAL STATEMENT End of Life StatementDownload the latest software and documentation for your 3Com Router Page Contents Contents About This GuideDownload the latest software and documentation for your 3Com Router 1 Introducing the Router 5000 Family2 Installation 3 Starting and Configuring the RouterTroubleshooting Router Software MaintenanceSolve Problems Online Purchase Extended Warranty and Professional ServicesAccess Software Downloads Contact Us Contents8 Contents About This Guide Router 5000/6000 Configuration Guide Router 5000/6000 Command Reference GuideConventions RelatedComments pddtechpubscomments@3com.comnetwork supplier Documentation12 About This Guide About the RouterHigh-performance processor The Router 5000 uses 1 Introducing the Router 5000 FamilyEthernet access solution By extending SICs and MIMs, the 3Com Router 3C13701Figure 2 Rear view of 3Com Router Figure 1 Front view of 3Com RouterSystem Description Table 2 Router 5012 IndicatorsTable 3 System description of 3Com Router Indication3C13751 Boot ROM Stores Bootstrap program3Com Router Table 4 LEDs of 3Com 5232 Router Figure 4 Rear view of 3Com RouterIndication System Description Boot ROM Stores Bootstrap programTable 5 System description of 3Com Router 3C13755 Table 6 Router 5642 Indicators3Com Router 5642 Figure 5 Front view of 3Com Router Figure 6 Rear view of 3Com RouterTable 6 Router 5642 Indicators continued System DescriptionTable 7 System description of 3Com Router Indication3Com Router 5682 Figure 7 Front view of 3Com Router 3C13759Figure 8 Rear view of 3Com Router Table 8 Router 5682 Indicators System DescriptionTable 9 System description of 3Com Router 3Com Router 5682 3C1375924 Chapter 1 Introducing the Router 5000 Family 2 Installation Installing the Router on a WorkbenchInstalling the Router in a RackPower Cords Grounds and Cables PGND WirePower Cord AC Power CordAC power supply well grounded. Otherwise, the router cannot reliably avoid lightningRecommended power outlet Figure 11 AC Power ConnectorConsole Terminal Introduction to console port Console cableIntroduction to the Ethernet interface Router to LAN ConnectionEthernet cable Router to WAN ConnectionIntroduction to the AUX port AUX cableWAN Interface to DSU/CSU Introduction to the synchronous/asynchronous serial interfaceSynchronous/asynchronous mode DTE and DCE V.24 RS232 DCE cable assembly V.35 DTE cable assemblyFigure 15 V.24 RS232 DTE cable assembly Figure 16 V.24 RS232 DCE cable assemblyV.35 DCE cable assembly X.21 DTE cable assemblyFigure 17 V.35 DTE cable assembly Figure 18 V.35 DCE cable assemblyFigure 19 X.21 DTE cable assembly Figure 20 X.21 DCE cable assemblyFigure 21 V24 DTE cable assembly Figure 22 V.24 DCE cable assemblyFigure 23 V.35 DTE cable assembly 38 Chapter 2 InstallationFigure 25 X.21 DTE cable assembly Figure 24 V.35 DCE cable assemblyFigure 26 X.21 DCE cable assembly E1 interface to DSU/CSU 75Ω unbalanced coax cable120Ω balanced twisted pair cable AttributeFigure 28 E1 120Ω balanced twisted pair cable T1 interface cable and network connector assembly are optional T1 interface to DSU/CSU3 Starting and Configuring the Router Setting up Configuration EnvironmentConnecting the router to a console terminal Setting the parameters for console terminal1 Select a connection port Checking before power-on Powering on the routerChecking/operating after power-on Press Enter and the screen will display Configuration Characteristics of the command line interfaceFundamentals of the RouterCommand line interface Configuration Fundamentals of the Router50 Chapter 3 Starting and Configuring the Router 4 Troubleshooting Troubleshootingthe Power System Troubleshooting ofTroubleshooting of repeated reboot Troubleshooting of “displaying illegible characters on the terminal”SDRAM Software Upgrade ApplicationUpgrade the application software again after the problem is solved 5 Router Software Maintenance IntroductionMaintenance under extended and basic. You can separately upgrade and back up theBoot Menu SoftwareThe following table gives default names and types of the boot files 4 Display applications in Flash memory 6 Clear console authentication Upgrading Software through XMODEM Upgrading the application imageFigure 34 Send File dialog box Upgrading the entire Boot ROM image Upgrading the extended segment of the Boot ROM imageCAUTION This upgrade approach upgrades only a portion of the Boot ROM image, so you can make a second attempt once errors occurUpgrading the application image through Ethernet Backup Extended Segment, are you sure?Y/NBackuping Boot ROM program to FLASH successed Restore Extended Segment, are you sure?Y/N64 Chapter 5 Router Software Maintenance 2 In Boot Menu, select 2 to enter Net Port Download Menu as followshost inet h IP address of TFTP Server flags f host inet h IP address of FTP Server Router Password password loss. They can help you to set a new passwordDealing with a LossService Benefits Solve Problems OnlineRegister Your Product to GainWarranty and ServicesAccess Software Purchase ExtendedContact Us Telephone TechnicalSupport and Repair http//csoweb4.3com.com/contactusCountry Telephone NumberCountry Telephone NumberCountry Telephone NumberCountry Telephone Number72 APPENDIX A OBTAINING SUPPORT FOR YOUR 3COM PRODUCTS