Lit
ct
(R)
[S-RI
(BR-BK)
6
(W)
( S-BRI
(BK-S)
(0-BK)
(Y) ( s-wl
(WI
(R-BL)
61
LS
(BK)
( S-BKI
R t
f g
(W)
ON
HS (A)
(W)
5
(W-BR)
GNt
LS
(G)
(S-YI
e
d
HS(B)
(S -BK)
2
3
HS(A)
(O-W)
(S)
*
(BK)
G3AR
HANDSET
(BR-R)
(BK-BR)
DP
FL
r
t
RR t
HEAD
TELEPHONE
SET
(BK)
(BR-R)
IOOOfi
(S)
1600!1
*
40108
NETWORK
(BK)
H (S-BKI
L2
0
NIA
OR
TIA
RINGER
(S EE NOTE)
*
(BL-V)
(V-BL)
T
6
(Y-BR)
BL
TO FIG.
4 OR 5
(W-0)
(0-V)
A
I
NOTE:
NIA RINGER SHOWN,TIA RINGER HAS SINGLE
COIL
(5200
OHMS) AND
ONLY
(R) AND (BKI
LEADS.
LEG END:
( ) CURRENT COLOR CODE
[ I MD COLOR CODE
*
INSULATED AND STORED
t TERM. ON NETWORK
J
UNDESIGNATED
TERM.
TERM.
ON
241-TYPE
AMPL ARE
ON
TERM. BOARD
ON
i.-DIAL OFT NORMAL CONTACTS
DP
-DIAL PULSE CONTACTS
LS
-
Ll NE swITCH
HS
(A) -517A HEADSET JACK A
HS (B) -517A HEADSET JACK B
F L
-FLA S H KEY
LINE SWITCH OFF HOOK S EQUENCE:
de
CLOSES
cb
CLOSES
fg
OPENS
TPA 505022
•
fig. 1-Current 636- and 637-Type (MD) Telephane Set, Cannectians •
"D
D
CD
..
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