C H A P T E R
Installing the Catalyst 3920 3-1
3
Installing the Catalyst 3920
This chapter explains the process you should follow to install the Catalyst 3920 Token Ring Switch.
Planning for Installation
Read this section carefully before installing the Catalyst 3920 Token Ring Switch. It contains the
information on preinstallation planning.
Note
Before installing the Catalyst 3920, read the “Safety Warnings” appendix.
Warning
Read the installation instructions before you connect the system to its power source.
If you have a large network, we recommend that you create a sketch of the network to which you
will add one or more Catalyst 3920 switches. Include major network elements such as hubs and
concentrators, servers, bridges, and routers.
To plan for the installation of a Catalyst 3920, obtain all connectivity and physical planning
information about the network segments to which you will attach. In addition, if you are planning to
use permanently installed telecommunications wiring, you should have information about the
cabling installation that will allow you to determine the termination points of every cable, the cable
type, connector type (if any), and the distance between termination points. Building floorplans and
telecommunications closet layouts are also useful.
Cabling Used Between Devices
Devices attached to the RJ-45 jacks on the front of the Catalyst 3920 should conform to the cabling
rules established in the EIA/TIA 568A and ISO/IEC 11801:1995. Straight-through cables should
always be used for the Token Ring ports. Because all ports operate at 120-ohm, no
impedance-matching balun or filtering is required for UTP or STP.
For more information about cabling distances and specifications, refer to the “Cable and Pin
Information” appendix for cable design specifications.
