Recognized categories of cable and connecting
hardware: Category 3: Characterized up to 16 MHz
Application examples: IEEE 802.5 4 Mbps Annex (Token Ring)
IEEE 802.3 10BASE-T (10 Mbps Ethernet)
IEEE 802.3u 100BASE-T4 (100 Mbps Ethernet)*
IEEE 802.12 100 Mbps Ethernet or Token Ring* Category 4: Characterized up to 20 MHz Application example: IEEE 802.5 16 Mbps UTP standard (Token Ring)
Category 5: Characterized up to 100 MHz Application examples:
ANSI X3T9.5 100 Mbps TP-PMD (FDDI over UTP)*
IEEE 802.3u 100BASE-TX (100 Mbps Ethernet)*
IEEE 802.12 100 Mbps Ethernet or Token Ring*
* emerging standards currently under development
NOTE: IEEE (802) standards define protocols and signaling techniques of various LAN systems. Cable Specifications
- Horizontal: 4 individually twisted pairs
- Backbone: 4-pair or multi-pair
- 24 AWG solid insulated conductors enclosed by jacket
Exceptions (if requirements are met):
- Overall foil shield (screened) may be used where required
- 22 AWG may be used
- Cable diameter must be less than 1/4î (6.35 mm) for 4-pair
- 4-pair color code (optional markings may be used)
Pair Color
 1 White-Blue/Blue 2
White-Orange/Orange  3
White-Green/Green  4 White-Brown/Brown
Patch Cords
- Stranded conductors specified for adequate flex-life
- Cables must meet horizontal transmission performance requirements (+ 20% attenuation values allowed)
- Recommended insulated conductor diameter:
- 0.8 mm (0.032 in) to 1 mm (0.039 in) Max. = 1.2 mm (0.047 in)
- Terminated either T568A or T568B pair assignment on both ends
Patch Cord Color Code Options: Pair Option 1
1 White-Blue/Blue
2 White-Orange/Orange
3 White-Green/Green4 White-Brown/Brow
Pair Option 2
 1 Green/Red
 2 Black/Yellow  3 Blue/Orange
 4 Brown/Slate
Cross-Connect Jumpers
- Must meet horizontal transmission performance requirements
- Color code: one white conductor and a conductor of another visibly distinct color such as red or blue
 Recognized Connector and Configurations
- 8-position modular jack/plug configured in either
the T568A or optionally the T568B pin/pair wiring configuration
 Product Performance Testing
- The two major areas of transmission performance testing for cables and connecting hardware are ATTENUATION and NEAR END CROSSTALK (NEXT)
- Values specified are "worst case" requirements that manufacturers must meet or exceed
- Separate values are provided for cables and cross-connect hardware
- In order for a product to meet a specific category class, all pairs must meet the requirements, not just one or a few
Link Performance Testing
- Annex E provides attenuation and NEXT values for worst case horizontal link performance
- Values are not intended to be used for installation
verification
- Test methods and apparatus for field testing of cabling links are under study and scheduled to be released as TSB-67 when approved
- The Annex E link model includes the telecommunications outlet/connector, the horizontal cable, mechanical
terminations in the telecommunications closet and up to a combined total of 10 m (33 ft) of patch cords and/or jumpers
 Installation Practices
- Strip back only as much cable jacket as is required for termination and maintain pair twists as close as possible to the point of mechanical termination
- At a minimum, never allow untwisting of pairs as specified:
category 4 - 1" max.
category 5 - 0.5" max.
Do`s Don`ts
Maintain a max. Never exceed
bend radius of 4x a 90 degree bend
the cable diameter
(4-pair cables)
Apply cable ties Don`t over-tighten†cable
tiesloosely and at
random intervals
Try to minimize Don`t over twist cable, twisting the amount of it can lead
to torn jacketsjacket
Avoid stretching the cable Don`t exceed 25 lbs.
of pulling tension
Use appropriate methods Don`t use a staple
for dressing and gun to position cables
securing cables No staple guns
- Cable ties
- Wire management panels
- Cable support bar
- Releasable Velcro straps
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