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D
C
ABLING
R
EQUIREMENTS
This appendix addresses many aspects of installing optical fiber cabling to
support the CoreBuilder
®
7000 family ATM switch environment. It also
deals with modem cables and Ethernet and control cables for
management. The following topics are covered:
■
Installing New Cabling
■
ATM Cabling
■
Ethernet Cabling
Installing New
Cabling
If you are installing new cabling, follow these guidelines:
■
3Com recommends that you use a cabling system plan, such as
AT&T's Premises Distribution System (PDS) or the IBM Cabling System.
■
Determine how many CoreBuilder 7000 units are going to be
supported by each wiring closet, and how many downlink
connections from these CoreBuilder 7000 units are planned.
■
Locate wiring closets to enable connections to the different floors.
■
To simplify installation of the network and to aid in troubleshooting,
install a telephone in each wiring closet for communication between
wiring closets, work areas, and other locations.
■
Include all linear distances (vertical rises, etc.) in the cable plan so that
all cables - from wiring closet to desk and to other wiring closets - are
under their respective maximum lengths.
Cable Labeling and
Record Keeping
A reliable cable labelling and record keeping system is essential when
planning any network installation. A good cable labelling system provides
enough information for you to locate the opposite end of any cable.
Maintaining accurate records helps you to:
■
relocate devices easily