Cabletron Systems STH-24 manual Operation, T122-24 Block Diagram

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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.

DC/DC

Converter

Twelve

Front Panel

Connections

Twelve

Front Panel

Connections

System

Diagnostic

Controller

i960 PLUS Core

SMB-1

SMB-10

FNB-1 or

FNB-2

Figure 3-1. 9T122-24 Block Diagram

3-1

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Contents SmartSwitch 9T122-24 User’s Guide Page Page FCC Notice Vcci NoticeDOC Notice Declaration of Conformity Addendum Page Contents Contents Introduction FeaturesManagement Information Base MIB Support 9T122-24 MicroLAN Module Getting Help Related ManualsInstalling the MicroLAN Module InstallationInstallation Reset Switch Reset SwitchSMB-1 Prom User-Accessible ComponentsLocation of Module DIP Switch Setting the Module Card DIP SwitchSee the Cautions at the end of this table Ring SpeedMulti-Ring Out Capability Using a Ring-Out PortInstallation Operation T122-24 Block DiagramTransparent Bridging BridgingSource Route Bridging System Management Buses Flexible Network Bus FNBDC/DC Converter System Diagnostic ControllerFNB Interface I960 CoreOperation Lanview LEDs Lanview LEDsFunctions of the FNB receive LED are listed in Table Functions of the Link LED are listed in Table Function of the Token Ring speed LEDs is listed in Table Safety ServiceSpecifications Electrical Physical
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