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This soft copy for use by IBM employees only.
2.2.2.4 Reset Button
The reset button resets both the IBM 8285 Base Unit and the optional IBM 8285
Expansion Chassis with its inserted modules.
For more information about the LEDs, the connectors, and the reset button, refer
to the
IBM 8285 Nways ATM Workgroup Switch: Installation and User
′
s Guide
,
SA33-0381.
2.2.3 155 Mbps ATM I/O Card
The 155 Mbps ATM I/O Card is an optional card installable in the 155 Mbps
Feature I/O Card Slot of the base unit. There are two types of 155 Mbps ATM I/O
Cards available, Multimode Fiber (FC 5500) and Single-Mode Fiber (FC 5501). It
becomes the 13th port of base unit and can be linked to an ATM station or to
another ATM switch that supports ATM 155, such as another 8285 switch or an
8260 hub.
2.2.3.1 Connectors
Both I/O cards have SC connectors.
2.2.3.2 LEDs
The 155 Mbps ATM I/O Card has the following LEDs:
•
Status
•
Output Activity
•
Error
2.3 Expansion Unit (FC 5502)
The 8285 Expansion Chassis provides three slots to receive IBM 8260/8285 ATM
modules, extending the 8285 switch′s functions and capacities.
The IBM 8285 Expansion Chassis consists of the following:
•
Internal Features:
− An ATM backplane that is similar to the one used in the 8260 hub.
− A planar containing a switch-on-a-chip, which connects the base unit
ATM ports to each other and to other ATM modules in the IBM 8285
Expansion Chassis.
•
External Features:
− Slots
− Connectors
− LEDs
− A rack-mountable chassis with an integrated, auto-sensing universal
power supply
Chapter 2. Introduction to the IBM 8285 Nways ATM Workgroup Switch 13