AT&T Bell System Plant Series Reference

BELL SYSTEM PRACTICES
Plant Series
SECTION 502-702- 1 01
Issue 1, February 1970
AT & TCo Standard
REFERENCE
17128 TELEPHONE SETS
Fig . 1-17128 Telephone Set
1. GENERAL
1.01
This section contains identification, installation,
maintenance , and connection information for
the 1712B telephone set. This information was
formerly contained in Sections 502-710-102 and
502-710-438 which are hereby canceled.
2 .
IDENTIFICATION
Ordering Guide
2 .0 1
Set, Telephone, 1712B-*
2.02 Replaceab le Components:
• Cord, Mounting, D14L-*
• Dial, 25P4t or 25H4(MD)
• Key, 638B, (line and signal key)
• KS-19240,12 Dial Lamp Sackett
• KS-19387,11 Dial Lampt
• P-25E803 Number Card Retainer
• P-26E572 Exclusion Key (Hold)
• P-89CO-* Housing
• Set, Hand, G3AR-*
* Add color suffix, refer to Section 500-120-100
for promoted colors.
t May be converted to 12-button by installing
D-180116 Kit of Parts and replacing housing
with appropriate 12-button housing.
t Available as D-179919 Kit of Parts
2 .03
Associated Apparatus or Equipment
(o rdered separately):
• 2012A Transformer (dial light)
• E1-Type ringer (when required)
2 .04
Optional Apparatus or Equipment (ordered
separately):
• D-180229 Kit of Parts (polarity guard) consists
of:
P-90D054 guard assembly
P-26E164 retainer
P-43A392 screw
Desi gn Featu res
2.05
The 1712B telephone set (Fig.
1)
is equipped
with a 638B key for line selection and
signaling.
2 .06
A hold key is included and is operated by
raising the left line switch plunger.
2 .07
A concealed lamp illuminates the dial when
the handset is removed. This lamp also
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