APPENDIX A: BASIC FDDI NETWORKS
Page A-10
BRIM-F6 User’s Guide
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.
Figure A-7. Valid Station Configurations
PHY
PMD
Single Attached
Concentrator
Dual Attached
Concentrator
PHY-B
PMD-B
PHY-A
PMD-A
PMD-3
Primary
In
Secondary
Out
Primary
Out
Secondary
In
PHY-3
PMD-2
PHY-2
PMD-1
PHY-1
PMD-3
PHY-3
PMD-2
PHY-2
PMD-1
PHY-1
PHY
PMD
Single Attached
Station
Dual Attached
Station
PHY-B
PMD-B
PHY-A
PMD-A
MAC
SMT
SMT
MAC
SMT
MAC
MAC
SMT
MAC
MAC
Primary
In
Secondary
Out
Primary
Out
Secondary
In
In
Out
In
Out
BRIM-F Book Page 10 Monday, January 29, 1996 9:26 AM
