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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

2134.0. "An Easy Question About DECcocentrator900MX/DEFPA wiring" by 50239::VSEMUSCHIN (Seva@COO, the Recycled Employee) Mon Sep 09 1996 10:20

    Sorry, I'm not the network specialist, 
    this question can be too trivial, but I have no other possibility
    to get the answer ... 
    
    
         +----------------------------------+
         |                                  | - Should I connect A and B ports ?
         |     +----------------------+     |   If yes, then which cable is 
         |     | DECconcentrator900MX |     |   necessary ?
         |     |     in DEChubOne     |     |
         |     +----------------------+     |
         |      A   M   M   M   M   B       |   
         |      |   |   |           |       |
         +------+   |   |           +-------+
                    |   |-BN24D Cables
               +-+--+   +--+-+
               | |         | |           On Both Alpha's different pairs of
               | |         | |           A B Connectors are chosen.
           A B A B         A B A B
          +-------+       +-------+
          | DEFPA |       | DEFPA |
          +-------+       +-------+
          AS2100A          AS2100
    
    Is it correct ?
    
    TIA 
    
    Seva
    
    PS
    More valuable help would be pointer to Ps copies of EC-K0750-42 (A
    Primer to FDDI) and EK-A0597-MI (FDDI Media Connection Information)

T.R Title User Personal
Name Date Lines

2134.1 BN34D, leave A and B ports alone. 31224::HARRIS_MA Sales Executive II Mon Sep 09 1996 15:23 10

T.R	Title	User	Personal Name	Date	Lines
2134.1	BN34D, leave A and B ports alone.	31224::HARRIS_MA	Sales Executive II	`Mon Sep 09 1996 15:23`	10
	Leave the "A" and "B" ports on the concentrator un-connected. Cable the DEFPA's to the concentrator with a single cable (Your references to ABAB is not correct on DEFPA. They actually have dual Rx/Tx pairs-- not Dual A/B pairs.) DEFPA has SC connectors, 900MX has MIC. That means BN34D is the correct cable to use between DEFPA and any port on the 900MX. Mark

    Leave the "A" and "B" ports on the concentrator un-connected.
    Cable the DEFPA's to the concentrator with a single cable (Your
    references to ABAB is not correct on DEFPA. They actually have dual Rx/Tx
    pairs-- not Dual A/B pairs.)
    
    DEFPA has SC connectors, 900MX has MIC. That means BN34D is the correct
    cable to use between DEFPA and any port on the 900MX.
    
    Mark