TCI Library https://www.telephonecollectors.info/
BELL
SYSTEM
PRACTICES
Plant
Series
SECTION
502-150-901PT
Issue
B,
January,
1967
Pacific
Tel.
DIAL-IN-HANDSET
F-56593
TELEPHONE
HANDSET AND
F-56594
TELEPHONE
BASE
IDENTIFICATION, INSTALLATION, CONNECTION, AND MAINTENANCE
Contents
Page
1.
GENERAL
1
2.
DESCRIPTION
. . . • • • . • . . • • • • • • • • • • • 1
F-56593
Telephone
Handset
.••••••••
F-56594
Telephone
Base
......•.•..
3.
INSTALLATION
.•.••..•.....•••.••.
AC
and
DC
Power
Supply
.•.••.••••
Single
Installations
.••••••••••••••••
Multiple
Installations
.••••••••••••.•
Lamp
Circuit
Modification
.•••.•.•.•
1
3
3
7
7
8
8
4.
MAINTENANCE . . . • • • • • • • • • • • • • • • . • 10
Transmission.
• . • • . • • • • • • • • . • • • • • . • 10
Dial
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Ringer
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Dial
Lamp
and
Recall
Relay
. • . • . . • 11
Cords
. . . . • . • • • . . • . • . • . • • • . . • . . . • . • 11
5.
CONNECTIONS • • • • • • • • • • • • • • • • • • • • 11
1.
GENERAL
1.01
This
s e
ction
covers
the
installation
and
m a i
nt
e
na
n c e of
th
e
"TWO
PIECE
"
Dial-
In-Ha
n
ds
e t t
ele
p
ho
n e
(Fi
g.
1),
which
is
simi-
lar
to
the
F-56171
Dial-In-Handset.
1.02
It
i s
re
i s
sued
to
d e
let
e
all
r e
fe
r
ences
to
portable
type
installations.
Since
this
r e
issu
e
co
ver
s a
general
revision,
marg
in
al
a r r
ow
s
ordina
r
ily
us
e d
to
indicat
e
chang
es
ha
ve b
ee
n
omitted.
1.03
Th
is
hands
et
is
des
ig
n ed
prim
a
rily
for
us
e
in
hospitals
and
oth
e r s i m
il
ar
in-
stit
u
tions.
How
ever
,
it
may
b e
installed
e
ls
ew h
ere.
Not
e:
Do
not
c
onfuse
th
i s
handset
with
TRI
M
LIN
E t e l e
ph
on e s et s .
1.04
The
Dial-In-Handset
is
intended
for
wa
ll
ins
tallation
only.
F-56593
....+
-a-
-
--
TELEPHONE
HANDSET
F-56594
m--
--
TELEPHONE
BASE
F-56594
Telephone
Base
With
F-56593
Telephone
Handset
Fig.
1
2.
DESCRIPTION
F-56593
Telephone
Handset
2.01
E
lectrically,
th
e F -
565
93
Handset
is
a
comp
le
t e t e l ep
ho
n e ex
ce
pt
fo
r r i
nger
and
swit
c h
ho
ok
fu
n
ctions.
It
consists
of
th
e
following
compon
e
nts:
•
LAI
r ec
eiv
er
unit.
• T 1
transmitter
un
i
t.
© The
Pacific
T
elep
hone
and
T
ele
graph Company, 1
96
6
Printed
in U.S.A.
Page
l