Enterasys Networks 9E312-12 manual DC/DC Converter, INB Interface

Operation

and control the SMB LANVIEW diagnostic LEDs. Although the system diagnostic controller and the main host processor can operate independently of each other if needed, they exchange information about each others status and overall module condition. The information gathered by the diagnostic controller is available to the network manager via local/remote management and the LCD located on the environment module. The 9E312-12 is designed to continue functioning in the event of a diagnostic controller fault.

DC/DC Converter

The DC/DC converter converts the 48 VDC on the system power bus to the necessary operating voltages for its host network services module. The diagnostic controller monitors and controls the operation of the DC/DC converter.

INB Interface

The INB Backplane is designed to transport fixed length data blocks between modules in the MMAC-Plus using a Time Division Multiplexing (TDM) design. The MMAC-Plus INB bus delivers 2.0 Gbs of true data bandwidth with all control and management communication being serviced on the 8 bit out-of-band bus. The INB can time slice its bandwidth using one of three methods. The default method is standard TDM round-robin bandwidth arbitration, the second method is for modules to reserve a specific amount of bandwidth using MONARCH, Cabletron’s INB Bandwidth Arbitrator, the third method permits the lowest slot number to use any bandwidth not used by the previous two methods.

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