Deseret evening news. [volume] (Great Salt Lake City [Utah]) 1867-1920, 1907-10-05

takes down his receiver he knows in
general way that his action causes "a
small lamp 90 glow on the switchboard
at the central office, uud Tint the
operator, placing plug IN The hole
that bears his number on the board.
sscertulns what number he desires and
gives him the connection by placing
another plug IN O. hole bearing the
number OF the telephone DC has asked
for and rings the other party's beu by
pretting a button. Two telephone in
struments a long board. "a girl
stretch Of wire and "a few poles are
about an the subscriber pictures In
the transaction when he bothers 20
picture it at all. He does not know
OF the intricate mechanism and the
dozens of delicate adjustments that
make his telephone conversation pos
sible.
MARvELs OF WIRING.
He does not know, for instance that
his signal flashes from his instrument
along the wall, out of the building 10
pole, down the pole through a ca
bic containing dozens or hundreds Of
wires. underground possibly a mile or
more 10 the building on State street
through a specially constructed duct In
the wall Of the main building Co the
fourth floor. thence through "a series
of frames or racks. and then Co the
board on the htth floor. Although his
signal has reached the operator I'm an
instant &c has passed along n wire
that has more than $50 sOldered con-
nections between him and the operator
His line IS one Of thousands that make
"a total of 1886 miles OF wire between
the State street manhOle iu front ~ the
building and the switchboard on the
NTH floor. distance Of less than $50
feet. OF this total wire mileage, 1854
miles IS contained in the ducts, each
$50 feet long, that extend from the
manhole 20 the first point Of distribu-
tion ON the fourth floor The remain
ing 2055 miles are in the frames on the
fourth floor and ln the local ana long
distance switehboards on the nth foor
WIRE CABLES.
The wires como into the building On
great cables containing 400 pairs. or
500 wires. They are spNccd into ZOO
pair cables iu tho area built for the
purpose under the fourth floor and pass
from there t1 the main dlstrbut-
ing frame" where they are "fan-
ned out" on separated, as indvidu-
al pairs. The} pass from the
main frame 90 the intermediate frame
through 2O-pair cables, corresponding
TO "multipHos' ON The switchboard,
which will hc explained later They are
canned out" again at the intermediate
frame which is huilt TO allow the
equalization of fhe load. or amount of
workon the various operators working
at the board above From the inter-
mediate frame tho lines go I'm cables Co
| the switchboard and also connect with
the "reIav rack" which bears the ape
uaratus that operates the line lamps.
| The "cou rack adjacent Co The relay
rack. bears repeating coils that dis
tribute current fO the subscribers Zoe
strumeuts through thc operators CORDS
ou the switchboard The operators
cord. of course. lF part ot the circuit In
every connection.
WIRES PROTECTED.
Each subscribers llno which ape
paroutv. but only apparently loses
Eos identity when b. goes into thr cable
after leaving th' slnsgfiperf mouse.
ASSUMES lts individuality again ut the
main frame. where 90 bears its uum-
ber and ls easily reached for repairs
on admstmeutF Tho cheat COLL
small coil of fine wire or high re-
slstanco iucased in nher forms part of
the circuit at ihe main frame The
beat coil Dr. ono uf several protective
devices When foreign electrical
current. such aF mIgHf come from %
Urht or power liur sufficiently strong
tu iulure the sensitive telephone ape
paratus. get ON the W|res the heat coil
IH NI'IANNN NNN NN' "NN"IlN 'ANN'IN ?"
carrlrd to the ground. This and other
devices protect the exchange end OF
the llno uul the snbsorlhers end Is
protected by other devices of similar
purpose
DESTRUCTION Or WORK.
Al the side OF the main frame op-
uDsite that whore the wires come Dor
from the outside are the functions of
tho outside and inside circuits, that
ls. the circuits running from the main
fr1mc 10 the subscribers instruments
aud those that connect tho main frame
ana thc switchboard. between the two