Cabling and Pinout Information

This appendix contains pinout information for CDDI A/B ports, CDDI adapter ports, concentrator master ports, and the optical bypass switch connector.

CDDI Cabling

MLT-3 is the new American National Standards Institute (ANSI) draft specification developed by Cisco Systems for compression of FDDI signals over UTP copper wire. Cisco Systems products upgraded to MLT-3 will interoperate with other vendor's equipment that complies with the draft standard.

CDDI/MLT-3 installations require Category 5 equipment throughout. Two types of Category 5 modular cables are used to connect concentrators and adapters to the network--cross-connect and straight-through. (See Figure E-1.)

Note MLT-3 equipment can only be connected to other MLT-3 equipment.

Figure E-1 illustrates the EIA/TIA 568B wiring standard and CDDI TX and RX pair.

Figure E-1: Wiring Standard and CDDI TX and RX Pairs

Figure E-2 shows the location of straight-through and cross-connect cabling for CDDI installations. Note that the cross-connect cabling is used between the concentrator and the patch pane.

Figure E-2: Straight-Through and Cross-Connect Cabling

Bypass Connector Pinouts

Figure E-3 shows the optical bypass switch connector pinouts.

Figure E-3: Bypass Connector Pinouts

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