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, ª155 Mbps ATM I/O Cardº 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.

12ATM Workgroup Solutions: Implementing the 8285 ATM Switch

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IBM SG24-4817-00 manual Ports, LEDs, Connectors