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Horizontal Cabling
Cat 5 & 6 Fiber Optics Wireless Arrising Technologies Horizontal Cabling

 

The layout of cables in building floor is usually called Horizontal Cabling

The horizontal cabling system extends from the telecommunications outlet in the work area to the horizontal cross-connect in the telecommunications room. It includes the telecommunications outlet, an optional consolidation point or transition point connector, horizontal cable, and the mechanical terminations and patch cords (or jumpers) that comprise the horizontal cross-connect.

 

(A) Customer Premises Equipment

(B) HC Equipment Cord

(C) Patchcords/cross-connect jumpers used in the HC, including equipment cables/cords, should not exceed 5m (16 ft.)
Note: ISO/IEC 11801 specifies a max. patchcord/cross-connect length of 5m (16.4 ft.), which does not include equipment cables/cords.

(D) Horizontal cable 90m (295 ft.) max. total

(E) TP or CP (optional)

(F) Telecommunications outlet/connector (TO)

(G) WA Equipment cord
Note: An allowance is made for WA equipment cords of 5m (16 ft.)

Notes:
* An allowance of 10m (33 ft.) has been provided for the combined length of patchcords/cross-connect jumpers and equipment cables/cords in the HC, including the WA equipment cords.
* In ISO/IEC 11801, the equivalent cabling element to the horizontal cross-connect (HC) is called the floor distributor (FD).

 


Some points specified for the horizontal cabling subsystem include:

bullet Application specific components shall not be installed as part of the horizontal cabling. When needed, they must be placed external to the telecommunications outlet or horizontal cross-connect (eg. splitters, baluns).
bulletThe proximity of horizontal cabling to sources of electromagnetic interference (EMI) shall be taken into account.
bulletRecognized Horizontal Cables:

4-pair 100 W unshielded twisted pair

4-pair 100 Ohm unshielded Twisted Pair

2-fiber (duplex) 62.5/125µm or a multimode optical fiber

(Note: ISO/IEC 11801 allows 120 W unshielded twisted-pair horizontal cabling.)

2-fiber (duplex) or a multimode optical fiber

*Note: In addition, two alternate horizontal cabling types allowed by ISO/IEC 11801 are 120 W unshielded twisted-pair and 50/125µm multimode optical fiber.

 

bulletMulti-unit cables are allowed, provided that they satisfy the hybrid/bundled cable requirements of TIA/EIA-568-B.2.
bulletGrounding must conform to applicable building codes, as well as ANSI/TIA/EIA-607.
bullet FaceplateA minimum of two telecommunications outlets are required for each individual work area.
First outlet: 100 W twisted-pair (category 5e is recommended)
Second outlet: 100 W twisted-pair category 5e.
Two-fiber multimode optical fiber either 62.5/125µm or 50/125µm.

bulletOne transition point (TP) or Consolidation Point (CP) is allowed. The term “transition point” will be removed from the second edition of ISO/IEC 11801. Under carpet cabling will no longer be covered by that standard.
bullet150 W STP-A cabling is not recommended for new installations.
bulletAdditional outlets may be provided. These outlets are in addition to and may not replace the minimum requirements of the standard.
bulletBridged taps and splices are not allowed for copper-based horizontal cabling (Splices are allowed for fiber.)

star topology

Topology
The horizontal cabling shall be configured in a star topology; each work area outlet is connected to a horizontal cross-connect (HC) in a telecommunications room (TR

  Reference :    siemon.com/standards
                          cisco.com

 

 

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Last modified: October 03, 2004