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This soft copy for use by IBM employees only.
2.2.2.1 Ports
The IBM 8285 Base Unit has the following ATM ports:
•
12 ATM25 Ports
− Fully compliant with the
ATM Forum Physical Interface Specification for
25.6 Mbps over Twisted Pair Cable
− Use standard RJ-45 connectors
− Support standard twisted pair cabling, either shielded or unshielded
•
1 ATM155 Port (Optional):
This port is further described in 2.2.3, “155 Mbps ATM I/O Card” on page 13.
2.2.2.2 LEDs
The front panel has LEDs for two purposes:
1. Port LEDs:
•
Port Enable
•
Output Activity
2. Switch Status LEDs:
•
Power
•
OK
•
Fault
2.2.2.3 Connectors
The front panel has four connectors:
•
Power Input
The power input connector matches the country-specific power cord that is
shipped with the base unit. The power supply itself is an auto-sensing
universal power supply.
•
Console Port
The console port is a standard RS-232 25-pin D-shell male interface for
connecting either an ASCII console or a modem in order to perform the
initial configuration.
•
Expansion Connector
The expansion connector is a 68-pin female connector used to attach the IBM
8285 Expansion Chassis using an expansion interface cable shipped with the
IBM 8285 Expansion Chassis shipping group.
•
Advanced Diagnostics Connector
The advanced diagnostics connector is a 9-pin connector used only by
authorized service personnel for advanced diagnostics. This connector is
not needed in any case to install and configure the 8285 switch.
12 ATM Workgroup Solutions: Implementing the 8285 ATM Switch