3com 4000 Manual De Usuario

C

HAPTER

 1: I

NTRODUCTION

The following sections describe the system hardware components.

The AccessBuilder 4000 system consists of a chassis assembly which 
contains one of two available main processor boards, power supply, 
indicator lights, and two slots for I/O cards of your choice. The main 
processor board is available with either an Ethernet, or a Token Ring 
LAN interface. Figure 1-2 shows the front and back of the system.

Figure 1-2   The AccessBuilder 4000 Front and Rear Panels

The front panel of the AccessBuilder chassis has three LEDs, which 
indicate Power, Status, and Activity, as shown in Figure 1-2.

Main Processor and I/O Card Slots.  AccessBuilder has three slots in 
the rear. The top slot contains the main processor board (Ethernet or 
Token Ring) and the two smaller slots below are for the I/O cards. The 
position of the slots and their numbering scheme are also shown in 
Figure 1-2.

The main processor board has Flash ROM for program storage, DRAM 
for software operation, NVRAM (non-volatile RAM) for configuration 
storage, and built-in Ethernet or Token Ring capability. The Ethernet 
version provides AUI, BNC, and 10BaseT connectors (switch selectable), 
as shown in Figure 1-3 to connect to the on-board Ethernet port. The 
Token Ring version provides connectors for shielded twisted pair (STP), 

Status

Activity

Power

SYSTEM STATUS

SYSTEM STATUS

AccessBuilder

4000

Front Panel

Rear Panel Token Ring

Rear Panel Ethernet

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