Cabletron Systems MMAC-Plus 9F106-02 User Manual
Also see for MMAC-Plus 9F106-02: Reference guide
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Operation3-2System Management BusThere are two management channels within the MMAC-Plus system: the SMB-1and the SMB-10. These buses provide out-of-band management and inter-modulemanagement communication. The 9F106-02 uses only the SMB-1 bus.The SMB-1 is a 1 Mbps management bus located within the MMAC-Plus. This busis utilized by all diagnostic controllers in the system including connectivitymodules, power supply modules and the environmental module. The SMB-1transports inter-chassis information between system components, such as powerand environmental information, as well as diagnostic messages.System Diagnostic ControllerThis diagnostic controller is composed of a Z-80 microprocessor and itssupporting logic. The diagnostic controller is designed to control the power-upsequencing of modules, monitor the 9F106-02 input and output parameters, aswell as monitor the temperature, and control the SMB LANVIEW LED. Thediagnostic controller on the 9F106-02 is also responsible for reporting the FNB andfront panel connectivity status to network management. The informationgathered by the diagnostic controller is available to the network manager vialocal/remote management and the LCD located on the Environmental Module.The 9F106-02 has been designed so that in the event of a diagnostic controllerfault, the 9F106-02 will continue to function.DC/DC ConverterThe DC/DC converter converts the 48 VDC on the system power bus to thenecessary operating voltages for its host network services module. The diagnosticcontroller controls the operation of the DC/DC converter.FNB InterfaceMMAC-Plus modules are designed with one of two attachment policies. Oneallows a module to dual attach to either FNB-1 or FNB-2; the second allows dualattachment to both FNB-1 and FNB-2. The 9F106-02 has dual attachment to theFNB backplane, connecting to both FNB-1 and FNB-2. The module can insert intothe FNB or bypass it. These flexible configuration options make the MMAC-Plusideal for networks designed to Bridge/Route multiple lower speed LANs to FDDIand/or networks designed using an FDDI collapsed backbone. |
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