Bell System Practices 636A Manual page 4

NOTE'
LINE
SWITCH OFF-HOOK SEQUENCE'
de-
CLOSES
cb
-CLOSES
to
-OPENS
( ) CURRENT COLOR CODE
( ) MD COLOR CQD£
*
I NSULATED AND STOR£0
t
TERM.ON NETWORK
+
TERM.ON TERM.BOARD 2
(S-11 )
(R-G)
(BR-8K) (8R)
u'
6
(R) (S-R)
(11-0)
A
I
A
(0-V)
FIG.
TO
8L (Y-8R)
4 OR 5
(V-8L)
R
(BL-V)
R OR Rl (S-Y)
8 OR 81 (Y-S)
Scanned by Frank Harrell, (Cowboy Frank) Castle Rock, Colorado
SSP S0l-610-410-i02_1 972-04-04.jpg
LEGEND'
-
ON
D 1 AL orr NORMAL CONTACTs
Qp-
DIAL PULSE CONTACTS
LS-
LINE SWITCH
H S lA )
-
51 7A JACK A
H SIB ) -
517A JACK 8
F L
- FLASH KEY
J
I
UNDES GNATED
TERMS.ARE ON
HEAD
I
TERM.BOARD
TELEPHO N E
SET
C R
R V
( )
(I I )
4
G N t
(I I - 8R) )8K-8L) (8K-BR) (G-Y)
5
H SIAl
(I I )
ON
(II)
(S-R)
(BK) (S-8K)
LS
(8L-R)
1 )
- W [S]
(R-8K) 0
IBR)
[S-G]
c
(Y)
(Y-8K)
(G]
I
(W-BL) (G-8L)
(R)
B
(S-R)
(R)
(Y-8L)
7
( Y-W) (8K) (S)
018 RINGER
Fig. 2-Early 636- and 637-Type (MD) Telephone Set, Connections
Feb 04,2012 14:13:46
F
425D NETWORK
R R
G3AR
HANDSET
Ll 0
RCVR
G
0
2
L
0.JE-0
0
(R-BL)
FL
6
(8R-R) (G-8K)
G3AR HANDSET
TRMTR
(R-G j
(G-8K) ( S-8R)
(8R-11)
(R)
21
+
KS-14337
CAP.
6'
H S IAl
(0-8K)
2 3
LS
(s-w]
(G OR 8L)
(Y)
*
DP
4
(8L-W) (0-R)
FL
A t
c l
Kt
AMPLIFIER
1510
R
(BK-BL)
(0-BK (
(o)
6 5 4
H S IBl
(R-8K) 1!
I I
2211A INO
fl
+
(R) HEAD
TELEPHONE
SET TRMTR
5.
3'
(8K-BL) (G-W)
KS-13490, L1
RES I STOR
(8K-G)
•'
I B
-
(8L)
Y
3 2
(S-8K) (8K-S)
H S IBl
(W)
(G) [S-Y] d
LS
(0-Y)
"'
2 3 4
I m
n
....
0
z
�
�
151D
ANPLIF I ER
L
(Y-G) (S-Y)
(G-R) (Y- 11 )
KS-14337
CAP.
(II-G) (Y-BL)
(II-G) (Y-8K)
(R-G) (S- 11 )
v
E
(D-W)
)
L
[R-W]
(S-8L)
2
(S-8R]
(R-BL)
I