BELL SYSTEM PRACTICES
AT&TCa Standard
SECTION
502-303-101
Issue
3,
September
1972
REFERENCE
ACl AND ADl TELEPHONE BASES
WITH 220A, 1220A, AND 22208 HAND TELEPHONE SETS
1.
GENERAL
'1.01
This section provides identification, installation,
maintenance, and connection information for
the •AC1 and AD1 telephone bases and associated
220A, 1220A(MD), and 2220B hand telephone sets
.•
•All AC1 and AD1 telephone bases
manufactured prior to 10-1-72 and
any base which is opened for any
reason should be rewired as shown in
T a b l e A b efore proceeding w ih
connections shown in other tables
.•
1.02
This section is reissued
to:
•
Include informaton on 1220A(MD) and 2220B
hand telephone sets
•
Show early and current model P1A ringer
connections for AC1 and AD1 telephone bases
•
Add Table A and read note 1.01
•
Add D4BW-29 mounting cord and new handset
and mounting cord lengths
1.03
Information on the 1220A(MD) and 2220B
hand telephone sets was formerly found in
Sections 502-304-101 and 502-305-101, respectively,
which are hereby canceled.
2.
IDENTIFICATION
2.01
The 220A, 1220A(MD), and 2220B hand
P-88EO*
COVER
lOA DIAL
RECALL
* ADD COLOR
SUFFIX
Fig.
1-220A
Hand Telephone Set
telephone sets (Fig. 1 and 2) are components
of the dial-in-handset TRIMLINE® telephone set.
The hand telephone sets are complete telephone
sets except for the handset cord, ringer, and line
switch which are housed in either a AD1 (Fig. 3)
or a AC1 telephone base (Fig.
7).
2.02
The AC1 telephone base is used for wall
mounted installations while the AD1 base is
used for desk type installations.
©
American Telephone and Telegraph Company,
1972
Printed in U.S.A.
SSP S02-303-101-i03_1972-09-0l.jpg Scanned by Frank Harrell, (Cowboy Frank) Castle Rock, Colorado Jan 31,2012 21:47:15
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