3Com S26x, S27x, S24x installation manual Installing SIMMs

Installing SIMMs

Installing SIMMs

Introduction This section explains how to install different types of SIMMs on the motherboard.

•DRAM: There are two types of DRAM:

-Global DRAM: This is memory that is accessible by all the boards in the PathBuilder S24x, 26x, and 27x switch.

-Processor DRAM: This is memory dedicated to the PathBuilder S24x, 26x, and 27x switch’s processor.

The PathBuilder S24x, 26x, and 27x switch motherboard comes with 8 Mbytes of Processor DRAM and 4 Mbytes of Global DRAM. You can add additional DRAM for a total of 8 Mbytes of Global and 16 Mbytes of Processor DRAM.

•FLASH: This is nonvolatile read/write memory.

•CMEM: This is nonvolatile (battery backed-up) configuration memory. This is where the real time clock is located.

•Data Compression: This is optional SIMM that is used for data compression functions.

Caution

Some components used in the PathBuilder S24x, 26x, and 27x switch are sensitive to static electric discharges; static electric discharges can cause damage to internal components. Use proper handling and grounding precautions whenever handling cards and components.

Mise en Garde

Certains composants du PathBuilder S24x, 26x, and 27x switch sont sensibles aux décharges électrostatiques qui peuvent les endommager. Prenez les dispositions et précautions de mise à la terre nécessaires lors de la manipulation de cartes et de composants.

Vorsicht

Einige im PathBuilder S24x, 26x, and 27x switch verwendeten Komponenten sollten keinen elektrostatischen Entladungen ausgesetzt werden, durch die interne Bauteile beschädigt werden können. Wenden Sie die entsprechenden Maßnahmen zur Erdung und zum Schutz vor statischen Ladungen bei der Handhabung von Karten und Komponenten an.

3-14 PathBuilder S24x, 26x, and 27x Switch Hardware Installation