Bell System Practices AC1 Reference page 12

SECTION 502-303-101
INS IDE WI R E t
LIGHT
TRNSF
I
T p
RING
NOTES:
I, STATION GROUND MAY BE OMITTED IF NOT REQUIRED FOR SERVICE;
NOT REQUIRED FOR PROTECTION OF DIAL
be CLOSES
2. LINE SI<ITCH OFF-HOOK SEQUENCE:
de CLOSES
3. DISCONNECT (S) LEAD FROM TERMINAL B WHEN HSAA HANDSET CORD
IS USED AND Tl P PARTY I DENT! FYI NG GROUND IS NOT PROV
IN SULA T E AND STORE.
Page 1 2
BSP S02-303-101-i03_1972-09-12.jpg Scanned b y Frank Harrell, (Cowboy Frank) Castle Rock, Colorado Jan 31,2012 22:01:59
LINE
SWITCH
( N OTE 2)
( B L)
( G )
.
.
.
1 6 5 0 n
' . , · ' , ·
.
� • • •
• • • . . • •
.
· �
:: : r:; : ::mw:
: ; ..
:
.
( R )
, . . . . . .
LIGHT TRANSFORMER
ab OPENS
j k CLOSES
Fig. 1 9-AC1 Telephone Bose Wiring Diagram (Current Model)
TERMINAL
BOARD
( B K) {BK]
( B K)
F
.
MESSAGE
WAITING
t i i ! i ] i
LAMP
( N OTE
ll
;��
A P
,
( R )
4.
LAMP AND RESISTOR ARE PART OF H5AD HANDSET CORD ONLY
5 .
(MESSAGE WAITING LAMP FEATURE). {Y] LEAD IS NOT
TERMINATED IN SET PLUG.
SET \<IRED FOR INDIVIDUAL OR BRIDGED SERVICE, FOR ALL
OTHER PARTY SERVICE REFER TO RINGER CONNECTION TABLE.
*
t
INSULATED AND STORED
I OED.
WHEN USED WITH
AND IBKI INSIDE WIRE LEAD BECOMES "A" LEAD. SEE TABLES
E AND F FOR ADD
4)
{R]
KTS IYIINSIDE WIRE LEAD BECOMES "AI' ' LEAD
CO CT O .
IT I O N AL N NE I NS
DIAL
LIGHT