52 Planning the site
Electromagnetic Interference (EMI)
Data degradation may occur if wires travel near strong sources of
electomagnetic interference. See “The equipment room environment” in
this document for common sources of interference.
Termination points
Once the routes for the wires have been determined, the termination points
for the these wires must be decided. The cables can terminate at various
locations:
-
main cross-connect terminal-typically in the equipment room
-
intermediate cross-connect terminals-typically on each floor in
telephone utility closet
-
wall jacks or terminal boxes-typically near the
final
device location
(within 8 ft [2.4 m])
Distribution frames
House cables terminate on the vertical side of two-sided frames and cross-
connect to equipment which is typically located on the horizontal. When a
color field approach is taken, the house cables typically terminate in the
blue field and the equipment terminates on the purple (USA) or white
(Canada) field.
In all cases the block where the cables are terminated must be clearly
designated with the cable location information and the cable pair
assignments.
Note:
A log book (cable record) of all termination information should
be kept See Table 11 for an example.
installation planning 553-3001-120