AT&T Bell System Plant Series Operation And Troubleshooting

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BELL SYSTEM PRACTICES
Plant Series
SECTION 506-326-500
Issue 3, June 1968
AT & TCo Standard
COIN TELEPHONE-1 A- AND 2A-TYPE
OPERATION TESTS AND TROUBLE ANALYSIS
1. GENERAL
1.01
This section provides operation tests which
should normally be performed at completion
of installation.
1 .02
This section is reissued to add information
on 2Al and 2A2 coin telephones, and to
change title.
1.03
Refer to Section 506-326-200 for installation
C. Dial Tone Test
D. Totalizer Operation (Off-Hook)
E. Coin Tone Signaling
F. Coin Release Mechanism
2. APPARATUS REQUIRED
and maintenance of 1A-type coin telephones. (a) PUC Cord
•Refer to Section 506-328-200 for installation and
maintenance of 2A-type coin telephones .•
(b) 1011B Test Set or equivalent
1.04
Operation tests covered are:
A. Totalizer and Coin Relay Operation
(On-Hook)
(c) Coins: 1 penny, 2 nickels, 1 dime, 2 quarters
B. Coin Relay Bias Margin Test
(d) 146B Bias Margin Gauge
3. PREPARATION
STEP ACTION
Tests A, B, C, D, and E
1
2
3
Invert handset on switch hook (Fig. 1) (1A-type
only).
Note:
Prevents armored cord from pushing
handset off switch hook when cover is removed.
Remove cover unit assembly (1A-type) tor
open door and faceplate assembly (2A-type)•
and remove plug Pl.
Place cover unit assembly (1A-type) on a firm
level surface.
Connect PllC cord between plug P1 and jack
Jl of chassis assembly.
© American Telephone and Telegraph Company, 1968
Printed in U.S.A.
VERIFICATION
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