IBM 8265, Site Preparation Manual, Page: 54 / 164

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IBM 8265: Planning and Site Preparation Guide
Unshielded Twisted Pair Cable Specifications
The 8265 media modules with twisted pair connectors may be attached to shielded or
unshielded cables. The unshielded cables are either UTP 100 ohms or FTP
100/120 ohms.
UTP Media Standards
The first high-frequency specification for UTP media was the IBM Cabling System
Type 3 specification, intended for use in token-ring networks of already installed, UTP
cabling. This specification sought to address as much of the installed base of UTP
cabling as practical, instead of creating difficult performance standards. It has
provided a useful minimum standard for 4Mbps token-ring transmission on UTP
media.
The American National Standards Institute (ANSI), the Electronics Industries
Association (EIA), and the Telecommunications Industry Association (TIA) have
developed a standard for wiring commercial buildings for telecommunication. This
standard seeks to assist when wiring new commercial buildings. It specifies crosstalk
and attenuation criteria up to and including 16 MHz. (For more information about this
Standard, see the
EIA/TIA Commercial Building Telecommunication Wiring Standard,
ANSI/EIA/TIA, July 1991.)
Because cabling manufacturers have developed even higher performance UTP
cables, EIA/TIA has issued
Additional Cable Specifications for Unshielded Twisted
Pair Cables, TSB-36, which establishes five categories of UTP cables described
below.
Category 1
Voice.
Neither ANSI/EIA/TIA 568 nor EIA/TIA TSB-36 address this category.
Category 2 (IBM Cabling System Type 3)
Low-speed data.
Neither ANSI/EIA/TIA 568 nor EIA/TIA TSB-36 specify this category.
IBM Cabling System Type 3 media is to be considered as EIA/TIA Category 2.
IBM Cabling System Type 3 media can conform to standards higher than the EIA/TIA
category; however, you must test the particular IBM Cabling System Type 3 media to
verify its conformance to any higher EIA/TIA category.
Type 3 Media Accessories:
The following accessories allow the existing installations that use the telephone
twisted pair media to connect devices in the network.
Part Number 6466940 Type 3 media filter, 9-pin D-shell to RJ11 plug
Part Number 6466942 Type 3 media filter, 9-pin D-shell to 24 AWG conductor
Part Number 6466943 DGM to Type 3 filter
Part Number 6466944 Type 3 media jumper cable