Cables are seldom connected directly on
distributing frame because direct connections
lack interconnection flexibility.
cannot make use of the color code.
require too much time for installation.
cause single-conductor wires to break easily.
A station technician may be expected to perform in-house wiring within
a station when the outside plant wireman has completed his task. The
wireman's task is usually completed when he attaches the cable pairs
vertical terminal blocks.
horizontal terminal strips.
Assume that a telephone cable uses the arrangement shown in the COLOR
Pair 113 will
orange-brown ring and red-black tip.
black-white ring and orange-brown tip.
orange-white ring and brown-black tip.
brown-black ring and orange-white tip.
Assume that you are checking the continuity of cable pairs, following
their connection to terminal blocks.
If you intend to use the DC
method, you will need