Cabletron Systems Appendix A Basic Fddi Networks, Page A-10, BRIM-F6 User’s Guide, Station

APPENDIX A: BASIC FDDI NETWORKS

Each physical ring connection requires:

•one PMD

•one PHY.

A SAS consists of:

•one SMT

•one MAC

•one PMD

•one PHY.

A DAS consists of:

•two PMDs

•two PHYs.

Single Attached
Concentrator
PMD-3	PMD-2	PMD-1
PHY-3	PHY-2	PHY-1
MAC
	PHY
SMT	PMD
	In	Out

				Dual Attached
				Concentrator
MAC	MAC	PMD-3	PMD-2	PMD-1
		PHY-3	PHY-2	PHY-1
	PHY-A				PHY-B
SMT	PMD-A				PMD-B
Primary		Secondary		Secondary	Primary
In		Out		In	Out

			MAC
			PHY
	SMT		PMD
Single Attached
Station
		In		Out

			MAC	MAC
		PHY-A			PHY-B
SMT	PMD-A				PMD-B

Primary	Secondary	Secondary
In	Out	In

Dual Attached

Station

Primary

Out

Figure A-7. Valid Station Configurations

Page A-10 BRIM-F6 User’s Guide