Bell System Practices 630 Series Installation And Maintenance Manual page 6

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
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