Bell System Plant Series Identification, Installation, And Maintenance

~·
1
(!,I
i
BELL SYSTEM PRACTICES
Plant Series
SECTION 502-5 1 0-1 00
Issue 6, December 1967
AT&TCo Standard
TELEPHONE SETS
500, 501, 554, AND 556 TYPES
IDENTIFICATION, INSTALLATION, AND MAINTENANCE
1. GENERAL
1.01
This section is reissued to:
• Remove information on TOUCH-TONE®
telephone sets.
• Include maintenance information formerly
found in Section 502-510-300, Issue 3.
• Add the 95C apparatus blank.
• Change housing assembly part numbers.
• Revise method of replacing defective ringing
capacitor.
• Place all MD information in Table A.
Since this reissue covers a general revision, arrows
ordinarily used to indicate changes have been
omitted.
1.02
Uses of these telephone sets may be found in
· the station set sections pertaining to selection
for general and specific uses. ·
"1.03
Selec~ion
of station apparatus for 1A, lAl,
and 1A2 key telephone systems is covered in
the connections section for the particular telephone
set.
1.04
Code numbers such as 500C/ D cover both
manual and d ial versions, respectively, of
the same type telephone set to permit converting
to either type without changing the code number
stamped on the base. The let ter R was added to
the code number at one time to indicate the set was
equipped with a retractile handset cord.
2. IDENTIFICATION
2.0 1 Purpose -
The 500-, 501-, 554-, and 556-
type telephone sets are single line sets for
use in common battery areas, manual or dial.
4·
Fig. 1 - 500A, C, E, J, L, R, or 501A, C, J
Telephone Set
Fig. 2 - 5008, D, F, K, M, S, or 5018, D, K
Telephone Set
2.02
Ordering Guide - All parts of the set en-
closed by the housing mount on the metal
base. The network and line switch are riveted to
the base and are not replaceable. Table A lists
components of these sets.
©
American Telephone and Telegraph Company, 1967
Printed in U.S.A.
Page 1