3Com CS/2500 manual PIN Assignments, Figure A-1 Serial Connector Pin Numbering

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A	PIN ASSIGNMENTS

This appendix lists pin assignments for port interfaces on CS/2500 and

CS/2600 series communications servers.

The CS/2500 and CS/2600 include three types of port interfaces:

■Ten serial RS-232-D or RS-422 connectors

■One 802.3 Ethernet (transceiver) connector

■One parallel printer connector

RS-232 Serial Ports The CS/2500 and CS/2600 have ten serial ports, labeled J0C through J9C, that provide RS-232 support and limited RS-422 support for connecting host and terminal devices to the server. Figure A-1 shows pin numbering for these ports.

25

1

25

1

50

26

50

26

Figure A-1 Serial Connector Pin Numbering

Table A-1 lists RS-232 pin assignments for devices attached to the serial ports. The communications server acts as a DCE device and can be attached to a DTE device, such as a terminal, host, or printer, using a straight-through cable. If you want to connect the server to a DCE device, such as a modem, use a null modem cable.

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Contents CS/2500 Series 3Com Corporation 5400 Bayfront Plaza Santa Clara, California Iii Page Contents Installation Maintenance and Upgrades PIN Assignments Technical Support Page Figures Tables Introduction About this GuideAudience ConventionsThis Typeface Italics Italics are used to denote new terms or emphasis About this Guide Features FeaturesOverview Ten standard RS-232-D electrical interfacesSW/2500, can be used only with the CS/2500 and CS/2600 SoftwareCompatibility Panel, see Back Panel on ChassisHardware Interrupt Front Panel Its +5 V DC output CS/2500 and CS/2600 back panel, shown in -5, contains Power supply module and three types of connectorsBack Panel Overview Back Panel Overview Mount Kit SpecificationsOptional Rack VAC Preparation InstallationDo the following before beginning the installation Installation Install brackets Turning on the server Cabling the ServerTo the Network All ports are set to terminal SETDefault -TERM DeVice = Installation End to the transceiver Slide-lock connection on the serverInstall brackets AC power source must meet the requirements outlined ConfigurationConfiguration, and Appendix C, Monitor Utility ModifyingInstallation Startup Guide or software release notes Diskette Booting fromRbcs files DisketteStartup 3Com Corporation CS/2000 Series Monitor Reading...OK Insert copy and hit return to continue Parameter changes Normal Startup Boot ProblemsMessages Shutting DownShutting Down Startup Firmware Monitor ConfigurationEntering Configuration Following menu is displayed ProcedureChanging SLP Changing the Configuration Configuration Changing the Configuration Next section SLP, and Trivial File Transfer Protocol TftpUsed with 3Com Network Control Servers NCSs Com no longer Tftp Type B Change IP/TFTP Parameters menu appearsConfiguration Bootp Software and to operate in mixed environments Emulating aCS/2000 or CS/2100 Changing Port Configuration Changing Port Configuration Configuration Maintenance Maintenance and Upgrades3Com recommends the following procedures for preventive MaintenanceMaintenance and Upgrades Maintenance Reinstall the fuseholder cartridge in the receptacle Upgrade procedures require you to remove the server cover UpgradesRemoving the Server Cover Rear Grasp both sides of the cover and carefully lift it off8-F Pull taut to expose screw Voltages. There are no user-serviceable parts inside Upgrades Remove Connector from Each pin must be inserted properly into its socket Replace the cover, as described in the next section EPROM. Each pin must be inserted properly into its socketUpgrades Maintenance and Upgrades Troubleshooting Troubleshooting Operating Problems Troubleshooting Memory Dump ProceduresEnter the density of the dump diskettes Return to use the default density 2mb Troubleshooting PIN Assignments Figure A-1 Serial Connector Pin NumberingTXD DTE Transceiver DO-S Slct Startup Messages Appendix B Startup Messages Monitor Utility You can access the monitor in either of the following waysNonfunctional Set the Auto-reboot parameter to Boot monitorContinuous Self-Test and Initial Boot Source parameters -2 on page 1-4. The switch is recessed into a round hole to Memory dumps, refer to Memory Dump Procedures onBecome nonfunctional, enter the following command Dump Procedures onSyntax BT Using this menu, refer to , Configuration Procedures onFilename and address parameters specify the name From memory locationDescription Repeats the previous command 3Com Bulletin Board Service 3ComBBS ServicesTechnical Support On-line TechnicalPress Return to see the ThreeComForum main menu Country Telephone Number Hong Kong 852 2537 44 1442 408 727 Appendix D Technical Support Sender’s expense To obtain an RMA number, call or fax Returning ProductsFor Repair 10/25/95 Numerics IndexCover Index Index Index Index Limited Warranty Bayfront Plaza Santa Clara, CA 408 764-5000 1/1/94