User's Manual Part 6

B-3
HC Horizontal Cross-Connect MC Main Cross-Connect IC Intermediate Cross-Connect
Work Area
The work area interconnects the horizontal cabling at the wall outlet to the desktop
devices. The maximum allowable distance for patch cables is three meters (9.8
feet), based on the cable being of the same type as the horizontal cable.
Telecommunications Closet
The telecommunications closet is the area in a building dedicated to
telecommunication equipment. The functions which take place in the closet include
the interconnection point between horizontal and backbone cabling systems, the
interconnection of two or more backbone cabling systems, and/or the
interconnection of the entrance facility to the overall telecommunications cabling
system.
Note 1
When the HC to IC distance is less than maximum,
the IC to MC distance for optical fiber can be
increased accordingly but the total distance from the
HC to the MC shall not exceed the maximum of
2000m (6560 ft.).
Note 2
When the HC to IC distance is less than maximum,
the IC to MC distance for UTP cable can be
increased accordingly but the total distance from the
HC to the MC shall not exceed the maximum of
800 m (2624 ft). For voice applications only.
HC
MC
IC
62.5/125 µm Optical Fiber Cable
3000m (9843 ft.)
500m
(1640 ft.)
2500m
(8202 ft.)
HC
MC
IC
2000m (6560 ft.)
Maximum
500m
(1640 ft.)
Maximum
1500m
(4920 ft.)
Note 1
TC
MC
IC
800m (2624 ft)
Maximum
500m
(1640 ft.)
Maximum
300m
(984 ft.)
Note 2
HC
IC/
MC
90m (295 ft)
Maximum
Multi-Mode Optical Fiber Cable
62.5/125 micron Optical Fiber Cable
100Ohm UTP Cable for Voice
100Ohm UTP Cable for Data
HC
IC/
MC
90m (295 ft)
Maximum
150Ohm STP-A Cable for Data