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3-1
Chapter 3
Operation
The 9T122-24 MicroLAN Module provides connectivity between the front panel
Token Ring(s) and the FDDI rings on the backplane (FNB-1 or FNB-2).
SmartSwitch 9000 modules connect to either the Internal Network Bus (INB) or
the Flexible Network Bus (FNB) bus. The 9T122-24 module connects to the FNB
bus. Figure 3-1 is a block diagram of the module. The front panel may be
configured as one Token Ring (
factory
default
) or as two rings. In the two-ring
configuration, the rings function as individual networks, each with 12 ports.
Bridging/Routing may occur between these two rings and/or to any other
SmartSwitch 9000 module via the FNB.
Figure 3-1. 9T122-24 Block Diagram
i960 PLUS Core
FNB-1 or
FNB-2
System
Diagnostic
Controller
SMB-10
SMB-1
DC/DC
Converter
Twelve
Front Panel
Connections
Twelve
Front Panel
Connections