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Conference 7.286::fddi

Title:FDDI - The Next Generation
Moderator:NETCAD::STEFANI
Created:Thu Apr 27 1989
Last Modified:Thu Jun 05 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:2259
Total number of notes:8590

726.0. "DEMFA installation problem" by DMAFSV::FRANK (Frank N. Thomsen, @DMA, 857-3625) Mon Sep 28 1992 09:22

 
	I have problems installing a DEMFA in an VAX 6000.
        
	With the XMI to  H3063 internal cable inserted in the XMI
        backplane (slot 4 - cable not connected to the H3063), the 
	power goes down after about two seconds. It looks like an 
	overcurrent condition.

        Looking at the cable I should think it's an one-to-one straight
        through cable, but measuring resistance between sockets in the
        connector reveals shorts  between several wires.

        
        Cable P/N 17-02488-02  Rev. A01 
        
        Wiev "into" the connector:

         /--- Black Arrow
         |                  +----+
         V                  |key |
        +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
        | 1| 2| 3| 4| 5| 6| 7| 8| 9|10|11|12|13|14|15|
        +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
        |16|17|18|19|20|21|22|23|24|25|26|27|28|29|30|
        +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+

        Short between: 1-2-4-7-10-20-23-26-30 (which, as far as I can tell
         translates to XMI D2 pin 6-9-12-14-15-31-35-38-41)

        Is this ok? 

        I have ordered a new cable, but in the meantime I want to know
        if anyone has seen similar problems?
        
        Maybe someone has a schematic of this cable...?


        /Frank
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