3Com 09-0487-002 manual

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Table of contents for the manual

  • Page 1

    1 LinkBuilder FDDI Workgroup Hub User Guide Release Note LinkBuilder ® FDDI W orkgro up Hub User Guide Release Note Part No. 09-0487-002/October 1993 This release note to the 3Com ® LinkBuilder ® FDDI Workgroup Hub User G uide discusses the following topics: ■ Change in FCC compliance ■ Contents of the LinkBuilder diskette ■ Corrections in[...]

  • Page 2

    2 LinkBuilder FDDI Workgroup Hub User Guide Release Note The system software has been preloaded into the hub management module flash memory. Downloading the image to the FDDI Workgroup Hub disrupts the ring. The download sequence isolates the hub from the ring during the power- on self-test (POS T) and may cause the ring to wrap or to isolate attac[...]

  • Page 3

    3 LinkBuilder FDDI Workgroup Hub User Guide Release Note Removing modules from the hub with the power on will not damage the hardware. However, the software may not be able to distinguish between intentional removal and catastrophic failure of a media module. As a result, some errors will be entered in the fault log and in some cases may fill the f[...]

  • Page 4

    4 LinkBuilder FDDI Workgroup Hub User Guide Release Note After flash memory has been verified, the status LED turns green when the system is fully initialized. Within a short time, the modem initialization string AT&F is briefly displayed. When the AT&F display disappears, you can access the management console command mode by pressing [Ente[...]

  • Page 5

    5 LinkBuilder FDDI Workgroup Hub User Guide Release Note Page A-7: Management Module Failure Error Code This a clarification of the management module failure error code. The management module failure erro r cod e is 0xxxxxxx. I f the second digit is 0 or 1 (that is, of the form 00xxxxxx or 01xxxxxx), the error code indicates a nonvolatile RA M erro[...]

  • Page 6

    6 LinkBuilder FDDI Workgroup Hub User Guide Release Note Page 2-21: Unshielded Twisted-Pair Cable Under the Unshielded Twisted-Pair Cable heading, the first paragraph now reads as follows: The standard UTP cabling type supported by the LinkBuilder FDDI Workgroup Hub is Level 5 data grade media cabl e, for example, AT&T ® type 2061, 1061, or eq[...]

  • Page 7

    7 LinkBuilder FDDI Workgroup Hub User Guide Release Note Replacing the Fuse If the hub’s LEDs are no longer lit, the unit may be disconnected from its AC power cord. If the power cord is securely connected but the LEDs are still not lit, the fuse probably needs to be replaced. The fuse is located in the hub’s AC receptacle assembly and supplied[...]

  • Page 8

    8 LinkBuilder FDDI Workgroup Hub User Guide Release Note 4. Remove the burned-out fuse by pulling it straight out of its socket, as shown in Figure 2. Figure 2. Removing the Fuse If you wish, you can store a spare fuse in the front section of the fuse-holder. 5. Insert a new fuse in the fuse-holder by reversing step 4. 6. Push the fuse-holder back [...]