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

Page 40

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

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Contents 3Com Router 5000 Family 3Com Corporation Campus Drive Marlborough Page Page Contents Introduction Software Maintenance under v 3.11 Environment Register Your Product to Gain Service BenefitsContents Contents About This Guide Related ConventionsDocumentation Comments Pddtechpubscomments@3com.comAbout This Guide About RouterEthernet access solution By extending SICs and MIMs, 3Com Router 3C13701System Description Router 5012 IndicatorsSystem description of 3Com Router 3C13751 SLOT1~3 READY/ACTIVELEDs of 3Com 5232 Router ReadyNvram 3C13755 Router 5642 Indicators3Com Router 5642 Front view of 3Com Router Router 5642 Indicators 3C13759 3Com Router 5682 Front view of 3Com RouterRouter 5682 Indicators Introducing the Router 5000 Family Installing the Router on a Workbench InstallingRouter in a Rack Standard rack, as shown in FigurePower Cords Grounds and Cables Pgnd WirePower Cord AC Power Cord AC power supplyRecommended power outlet AC Power ConnectorConsole cable Console Terminal Introduction to console portAttributes of the console port Router to LAN Connection Introduction to the Ethernet interfaceEthernet cable Attributes of the Ethernet interfaceRouter to WAN ConnectionIntroduction to the AUX port AUX cableWAN Interface to Attributes of the synchronous/asynchronous serial interfaceAttributes of the synchronous/asynchronous serial interface Transmission rate and distance of V.24 RS232/V.35 cableDTE and DCE 24 RS232 DCE cable assembly DTE cable assembly35 DTE cable assembly 35 DCE cable assembly21 DTE cable assembly V24 DTE cable assembly 35 DCE cable assembly E1 interface to DSU/CSU 75Ω unbalanced coax cable120Ω balanced twisted pair cable E1 interface attributesE1 120Ω balanced twisted pair cable T1 interface to DSU/CSU T1interface attributesSetting up Configuration Environment Connecting the router to a console terminalSetting the parameters for console terminal Startup RouterSetting the connection port in the local configuration 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 Router InterfaceCommand line interface Starting and Configuring the Router Troubleshooting Power SystemTroubleshooting of nothing being displayed on the terminal ConsoleTroubleshooting of repeated reboot SdramSoftware Upgrade ApplicationTroubleshooting Configuration file IntroductionRouter manages three types of files Application image file main softwareMaintenance under Boot MenuSoftware EnvironmentDefault names and types of the boot files =MAIN B=BACKUP S=SECURE Flag set successfully Upgrading Software through Xmodem Upgrading the application imageDownload completed Upgrading the entire Boot ROM image Upgrading the application image through Ethernet Router Software Maintenance Software Maintenance under v 3.11 Environment Router Password Password loss. They can help you to set a new passwordDealing with a LossService Benefits Solve Problems OnlineRegister Your Product to GainWarranty ServicesAccess Software Purchase ExtendedTelephone Technical Contact UsSupport and Repair Country Telephone Number US and Canada Telephone Technical Support and Repair Appendix a Obtaining Support for Your 3COM Products

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