Bell System Practices AC1 Reference page 3

CONVERSION OF EARLY MODEL AC1 AND AD1
TELEPHONE BASES ( FIG. 18 AND 20).
MANUFACTURED PRIOR TO 10-1-72 TO AGREE
WITH CURRENT PRODUCTION MODELS
(FIG. 19 AND 21) (SEE READ IN 1.01.)
WIRE OR LEAD
(SEE NOTE)
Ringer
Lead
A
Strap from
• Insulate and store.
t ADl
base only.
Note: Early model
1 5
pins and of the mounting and handset cord jacks are
(W) and (Y), respectively. In current model, the leads
1
from pins and
•
P-90D231 Polarity Guard Assembly (1220A
and 2220B only)
*Refer to Table B for color suffix.
A suqscriber instruction booklet (SIB-2426)
2.06
is shipped loose with the hand telephone set
and should be left with the customer.
Design Features
2.07 220A, 1220A, and 2220B Hand Telephone
Sets:
•
Illuminated dial
Early production handsets will have
Note:
the l a m p in a vertical p osition, current
production handsets have the lamp in horizontal
position.
•
Equipped with a recall switch
•
P-82E800 type cover or number card and
associated retainer can be used to conceal
housing screws and lamp
SSP S02-303-101-!03_1972-09-03.jpg Scanned by Frank Harrell, (Cowboy Frank) Castle Rock, Colorado Jan 31, 2012 21:48:09
TABLE A
COLOR REMOVE CONNECT
FROM
BL
B
•
s
G
BKt
A
BK
ACl ADl
and bases, the leads from
5
are (Y) and (W), respectively.
STANDARD COLOR*
TO
•
B
Ll
L2
*Refer to Section 5 00-1 20-100 for promoted
colors.
Note:
the field with a number card or cover used
to conceal the screws in the handset. Current
production sets will have the number card in
the base since this is a more convenient
location for the customer.
•
Equipped with jack (Fig. 4) to accommodate
a plug ended handset cord (Fig. 5)
2.08 ACJ and ADJ Telephone Base:
•
Factory-wired for individual or bridged
service, see Tables C and D for other classes
of service
•
Adjustable ringer volume control
•
ACl base (for vertical mounting)-jack
equipped to receive plug-ended handset cord
•
ADl base (for horizontal mounting)-jack
equipped to receive plug-ended handset and
mounting cords
•
lead control (optional)
A
•
4-party full selective or 8-party semiselective
ringing by adding 426N diode (optional)
ISS 3, SECTION 502-303-101
TABLE B
COLOR ORDERING GUIDE
Bl a c k
Ivory
Green
Red
Yellow
White
Rose Pink
Lt. Beige
Lt. Gray
Aqua Blue
Turquoise
Hand telephone sets may be found in
SUFFIX
-os
- 5 0
- 5 1
- 5 3
- 5 6
- 5 8
- 5 9
-uo
-Bl
- B2
-B4
Page 3