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Bell System Practices 630 Series Installation And Maintenance Manual page 6

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SECTION
502-600-100
(3)
(4)
(5)
(6)
(7)
(8)
Fig. 8 —Typical
Connections
to 635-Type
Key
(Line
1), Orange
(Line
2), Green
(Line
3),
key
modules
these
keys
are
not
compatible
Brown
(Line
4), Slate
(Line
5, Cutoff
key, or
appearance
wise and should
not be intermixed
transmitter),
and White
(Line
6).
in the
same
telephone
set.
Position
key in key frame
making
certain
that
latch
arm
engages
in the
pivot
bar.
Secure
key with
captive
screws
at top and
bottom
of key.
Test keys for proper
operation
(random
test
from
module
to module).
Remove
caps
and
install
key
designation
numbers.
Replace
caps.
Install
proper
collar
furnished
with 635-type
2.16
Lines
on the
current
production
telephone
sets can be transposed
from one key position
or key module
to another
by
moving
the
508-Wpe
plugs
on the
back
of the
keys.
Mounting
cord
conductors
are
of sufficient
length
to allow
for
complete
flexibility
of the
508-type
plugs.
2.17
To convert
locking
pickup
keys to nonlocking
for signaling
use.
( 1 ) Remove
811058379
(P-1 OE837 ) screw
(598-,
599-, 656-, or 657-type
keys) or the 8128577'38
(P-28 E773)
locking
pin from
635-type
keys.
(2)
Store
screws
or
locking
Din bv taDin~
to
keys,
Earl~' production
keys hate
rectangular
.
.
.
inside
of set base.
buttons,
and current
production
keys have square
buttons
(Fig.
10) making
the collars
incompatible.
J'Vote:
\Then
concerting
keys in concentrator
type telephone
sets from locking
to nonlocking,
Not e:
Llue to
the
difference
in
shape
of
an insulator
must
be installed
o~er
the
key
the
buttons
on early
and
current
production
contacts
associated
with
the operation
of the
Page
6

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1630 series2630 series