Ref: 99960035 Title: 3Server/500 Network Server Guide Release Note number 6690-00 Date: 8/15/89 Copyright 3Com Corporation, 1991. All rights reserved. 3Server/500 Network Server Guide Release Note Part No. 6690-00, 8/15/89 Electromagnetic Compatibility The Federal Communications Commission and VDE information in this release note replaces the information in the 3Server/500 Network Server Guide. Federal Communications Commission Notice This equipment generates and uses radio frequency energy and if not installed and used properly, that is, in strict accordance with the manufacturer's instructions, may cause interference to radio and television reception. It has been type-tested and found to comply with the limits for a Class B computing device in accordance with specifications in Subpart J of Part 15 of FCC Rules, which are designed to provide reasonable protection against such interference in a residential installation. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause interference to radio or television reception, which is determined by turning the equipment on and off, the user is encouraged to try to correct the interference by one or more of the following measures: - Reorient the receiving antenna - Relocate the computer with respect to the receiver - Move the computer away from the receiver - Plug the computer into a different outlet so that the computer and receiver are on different branch circuits If necessary, the user can consult the dealer or an experienced radio/television technician for additional suggestions. The user may find the following booklet prepared by the Federal Communications Commission helpful: How to Identify and Resolve Radio-TV Interference Problems. This booklet is available from the U.S. Government Printing Office, Washington, D.C. 20402, Stock No. 004-000-00345-4. NOTE: In order to maintain compliance with the limits for a Class B computing device, 3Com requires that shielded interface cables be used when connecting to this device. Suggested cable types are: .BR;Thin Ethernet: 3C530-xxx or equivalent .BR;Thick Ethernet: 3C120-xxx or equivalent .BR;Transceiver Cable: 3C110-xxx or equivalent Use only 3Com transceivers and drop cables when connecting to 3Com products for proper operation and reduced radio frequency energy. VDE Class B Compliance Hiermit wird bescheinigt, dass der 3Server/500 Network Server in Ubereinstimmung mit den Bestimmungen der Vfg 1046/1984 funk- entstort ist. Der Deutschen Bundespost wurde das Inverkehrbringen dieses Gerates angezeigt und die Berechtigung zur Uberprufung der Serie auf Einhaltung der Bestimmungen eingeraumt. We hereby certify that the 3Server/500 Network Server complies with the RFI Suppression Requirements of Vfg 1046/1984. The German Postal Service was notified that the equipment is being marketed. The German Postal Service has the right to re-test the equipment and to verify that it complies. 3Com Corporation 3165 Kifer Road Santa Clara, California 95052-8145, USA Optional Hard Disk Drive 3Com does not yet support the installation of a second hard disk drive in a 3Server/500 network server, as documented in the 3Server Drive Option Guide. Check with your network supplier for information about support for this option. IBM Token-Ring Network 16/4 Adapter All adapters on a token ring network must be configured to operate at the same speed. If your network uses 16/4 adapters exclusively, you can configure it for either 4 or 16 megabit operation. The error message "Tokenboot Failed Error Code:0306" may indicate that your 3Server/500 network server's base memory size is set incorrectly. Access the maintenance mode menus and select the correct base memory size for your configuration. If the 16/4 is the only shared memory mode board installed, select the 768 KB option. Configure the adapter to use IRQ3 and CC000h for the ROM address. When using the 3C program with a 3Server/500 network server that has an IBM Token-Ring Network 16/4 Adapter, you must use the full 12-digit network address anytime you enter the /ADDR parameter. Be sure to write down the address of the IBM 16/4 Token-Ring Network Adapter when it is displayed on the server's LCD in the token boot mode. It can be difficult to determine the network address of this board from it's documentation. Memory Board Installation A braided ground strap (fastened to the drive housing inside the server) has been added for electromagnetic interference suppression. To install a memory board, follow the procedures in the 3Server/500 Network Server Guide. After you tighten the memory board captive screw, complete the installation by connecting the ground strap to the connector on the memory board bracket. COM2/3 Diagnostic When you run the COM2/3 diagnostic test from the diagnostic mode menu, both the COM2/3 port and the LocalTalk port are tested. To run this test, install loopback plugs on both the COM2/3 and LocalTalk ports. LocalTalk Loopback Plug The pin-to-pin connections listed in the 3Server/500 Network Server Guide for the LocalTalk loopback plug are incorrect. The correct connections are pin 6 to pin 8 and pin 3 to pin 5. Hard Disk Errors If you get the message "Failure reading hard disk," be sure the SCSI host adapter board is firmly seated in the expansion slot.