Standards n2



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ANSI-TIA Standards
8718 source
HORIZONTAL
MAIN
Cross Connect
Cross Connect
INTERMEDIATE
Cross Connect
HORIZONTAL
A
B
C
A
 
Main Cross-Connect
 to 
Intermediate
1st Level Backbone
 Media Type 
Distance
62.5/125
Pm fiber 1700m
50/125
Pm fiber 
(5575’)
Singlemode fiber 
2700m 
(8856’)
UTP (voice) 
500m
(1640’) 
B
 
Intermediate to
 Horizontal
2nd Level Backbone
 Media Type 
Distance
62.5/125
Pm fiber 300m
50/125
Pm fiber 
(984’)
Singlemode fiber 
300m
(984’)
UTP (voice) 
300m
(984’)
C
A = B + C
NOTE: Fiber distances are 
based on voice transmission.
See table on page N7 for 
data applications.
ANSI/TIA-568-C.1: Backbone and Horizontal Cabling Structure
A backbone cabling structure shall have no more than two levels of cross-connections. A two-level backbone and the relationship 
with horizontal cabling is shown below.
Application Notes


TECHNICAL
N10
Hubbell Premise Wiring • 14 Lord’s Hill Road • Stonington, CT 06378 • Tel: (860) 535-8326 • Fax: (860) 535-8328
ANSI/TIA
-568-
C.1
ANSI/TIA-568-C.1: Work Area
The work area is the terminal end of the structured cabling network. This is the space for interaction of people with computers, 
phones, data terminals, and other devices on a local area network (LAN).
X
A minimum of two telecommunications outlet connectors are required at each work area:
O
First Outlet (mandatory): 4-pair 100
: UTP or ScTP cable and connector (Category 5e min. recommended).
O
Second Outlet:
V
4-pair 100
: UTP cable and connector (min. Category 5e, Category 6 is recommended).
V
2-fiber 62.5/125
Pm or 50/125Pm optical fiber cable and connectors: SC, ST-style, or SFF recommended.
X
One horizontal transition point or consolidation point is permitted.
X
Bridges, taps, or splices are not allowed in copper wiring.
X
Additional outlets are allowed. Double gang box is best for service loop storage.
X
Equipment cords must have the same performance rating as the patch cords.
X
Maximum length for work area cords is 5 meters.
X
Splitters are not allowed in optical fibers.
X
Separation from electrical wiring and pathways shall be according to ANSI/TIA-569-B.
X
Work area telecommunications outlet boxes should be located near an electrical outlet (within 3 feet) and installed at the same
height, if appropriate.
X
For cable count and pathway capacity, use 1 work area per 100 ft.
2
of floor space as a general rule. Always factor in 
future growth for all pathways.



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