Specifications

9031342 E5 Introduction
1-3
ATM/ForeRunner Overview
Figure 1-1 is a functional block diagram of a device and its ATM and LAN
network connections. The device contains either a 9A000, SFCS, or ASX
controller. (SPECTRUM models the devices as either ForeASX100,
ForeASX200, or ForeASX1000 model types, as described later in this chapter.)
Figure 1-1. Functional Block Diagram of a Device and its Network Connections
Functionally, a device is divided into two blocks; the device controller and the
ForeSwitchApp. The ForeSwitchApp is grouped by function into the ATM
network with the ForeUserApp, which is itself contained within a user node
such as a multi-homed workstation. (A multi-homed workstation is a
workstation containing firmware that makes it part of the Ethernet and ATM
networks to which it is connected.) Therefore, the workstation’s ForeUserApp
provides the connection between the ATM network and the Ethernet LAN.
Figure 1-1 provides an indication of how SPECTRUM models the devices, the
network applications, and the workstations in your network.
Ethernet Port
ForeASX200/
ATM Network
ForeSwitchApp
Workstation
Ethernet LAN
Device
ATM Port Connections
(SW_Link)
ForeUserApp
ForeASX1000
ForeASX100/
Device Controller