Configuration Guidelines

The cable topology rules for Token Ring are shown below:

Media

4 Mbps

16 Mbps

 

 

 

Category 3 UTP

660 ft/200m

330 ft/100m

Category 4, 5 UTP

1,320 ft/400m

660 ft/200m

Type 1 STP

2,000 ft/600m

1,000 ft/300m

 

 

 

Power Supply and Fuse

The Switch 2000 TR automatically adjusts to the sup- plied voltage. The fuse is suitable for either 90-110V A.C. or 220-240V A.C. A spare fuse is provided in the fuse drawer.

Replacing the Fuse

Refer to Figure 2-1 for the location of the fuse. When necessary, replace the Switch 2000 TR fuse with a fuse that has the following specifications:

250 volts — 4A Slo-Blo

1Power down the Switch 2000 TR by removing the AC power cord or the Redundant Power System cords.

2Gently pry open the fuse holder cover with a small flat-blade screwdriver.

Installing the Slide-in Modules

2-3

Fuse location

AC connector

Figure 2-1Switch 2000 TR Fuse Location

3Slide out the fuse holder drawer and remove the fuse.

4Install the replacement fuse and close the fuse drawer.

5Re-insert the power cord and apply power.

Installing the Slide-in Modules

This section explains how to install the three optional modules into a SuperStack II Switch 2000 TR device. The modules are:

ATM

FDDI

TR-in-FE

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3Com TR manual Installing the Slide-in Modules, Configuration Guidelines, Power Supply and Fuse, Replacing the Fuse