3Com S27x, S26x, S24x installation manual Flash Simm

Hardware Components

FLASH SIMM	The FLASH Single In-line Memory Module (SIMM) holds a compressed image of
	the operating software. This module is electrically erasable and reprogrammable.
	An optional FLASH SIMM can be installed for backup. These modules are installed
	in one of the SIMM slots (1 or 2). Figure 1-8shows the SIMM.

	Figure 1-8. FLASH SIMM
			Note
			The chips on your SIMM may vary from the one shown inFigure 1-8.
CMEM SIMM
	The Configuration Memory Module (CMEM) SIMM has 512 Kbytes of memory and
	provides the real time clock function. The CMEM is backed up by a lithium battery
	in case of a power disruption.
	Each PathBuilder S24x, 26x, and 27x switch has a Software Serial Number (SSN)
	burned into a PROM located on the CMEM card. This SSN is used to verify the
	software options that are enabled for that node. It is on the CMEM SIMM card for
	easy removal and replacement in case of a motherboard failure.
	The CMEM is installed in the SIMM slot (see Figure 1-7for slot location).
	Figure 1-9shows the CMEM.
		Warning
	Only qualified service personnel should perform the procedure described in this
	section. If the battery is installed incorrectly, it could explode after the PathBuilder
	S200 series switch product is powered up, damaging the unit.
		Avertissement
	Seules des personnes qualifiées peuvent mettre en pratique les procédures décrites
	dans cette section. Si la batterie n’est pas correctement installée, elle risque
	d’exploser après la mise en marche du produit PathBuilder S200 series switch et
	d’endommager l’unité.
		Warnung
	Die in diesem Abschnitt aufgeführten Vorgänge sollten ausschließlich von
	qualifiziertem Servicepersonal durchgeführt werden. Wenn die Batterie
	unsachgemäß installiert wird, kann sie nach dem Einschalten des PathBuilder S200
	series switch-Produkts explodieren

About the PathBuilder S24x, 26x, and 27x switch 1-13