The commercial. (Union City, Tenn.) 190?-193?, 1915-01-15

III VIII Do one VI JHe InOSC complete
plants to be found in any city and
Union City will be furnished with the
latest and best telephone service in the
country.
When all these things are taken into
consideration there can be very little
objection to the schedule of rentals and
the change of operation. The rentals
are actually lower with the new service
when the duplex system is used, and
that is an inducement which cannot be
overlooked, especially by those who are
not able to take advantage of the desk
service and higher rentals.
DETAILING OPERATION.
The exchange consists Of three sec
tions of switchboard for local subscrib-
ers, two sections for rural subscribers
and three for long distance. In addi-
ton tc the switchboard there are two
sets of storage batteries of eleven cells
each, mercury arc rectifier for charg-
ing the batteries and all the necessary
frames, racks, lightning arresters and
line testing apparatus.
The principal frame is the main dis
tributing frame, which is used to con-
meet any subscriber to any number to
which he is assigned. The subscribers
lines all terminate at this frame perma-
nently after going through the light
ming arresters. At another point on
this frame all the lines from the switch
board terminate permanently. The
frame is so constructed that Jumper
wire" can be run in to connect the sub
scriber to his number In case num-
Der is to be changed it is only necessary
to run in new jumper.
After the incoming lines leave the
main distributing frame they run
through cables to the switchboard,
twenty lines to each cable. After each
line has looped through the board in
front of each operator they run to the
intermediate distributing frame. On
the opposite side of the frame are locat-
ed the lines to the answering Jacks.
They also are in order of their num-
bers. The answering jacks are similar
to the multiple jacks which are previ-
ously described except that there is only
one to each subscriber and each is pro-
vided with a removable number plate
and each has small electric light un-
1erneath. This light illuminates when
a subscriber removes his receiver from
he hook. Each operator has approx
mately 200 lines to answer, but as she
sits close to the next operator she can
each over into the next section and
lelp out if it becomes necessary.
When a subscriber removes his re-
.eiver from the hook light appears in
ront of the operator just below his an
wering fack. The operator immedi-
tely inserts cord in the jack, and the
ight goes out. She then throws the
stening key corresponding to that
ord. This enables her to converse
nth the subscriber and ask what num-
er he wants. She then takes the mate
} the cord on which he is talking and ;
18th it makes the busy test that is
lerely to touch the tip of the cord to
1e metal sleeve of the multiple jack 6
hich bears the number with which he
ishes to talk. If the line is busy the i
perator will hear sharp click in her {
,ceiver. This is also audible to the {
lbscriber. The subscriber must call i
gain. If the line is not busy the op- I
'ator will insert the cord into the jack t
Id operate the ringing key, thus ring S
g the other party. The supervisory /
mp on this cord will light when the
'rd is inserted in the jack and remain
;hted until the subscriber answers, so T
is not necessary for the operator to
ten in on the line until the party an
'ers. When the conversation is fin
led and both parties hang up their
ceivers two lights will appear before n
e operator, thus indicating that both
rites are finished. She will then re-
owe the cords from the jacks without r
tening on the line. As the removal b
a receiver from its hook will cause b
e line lamp to light, it is important u
at the receiver be kept on its hook at !,
times when not in use. When a re-
yer is left off accidentally the operator N
ports it to the wire chief, who will "
t the line with volt meter to be sure =
S receiver off and not other trouble. ci
his tests show a receiver off he b.
! put 'howler" out on the line. This
! cause loud noise in the subscrib- p
s receiver, who should Immediately 80