Bell 2568HP Identification, Installation, Connections, And Maintenance

BELL SYSTEM PRACTICES
Plant Series
SECTION 529-225-134
Issue 2, August 1968
AT&TCo Special
TELEPHONE SETS - 2568HP /HU
IDENTIFICATION, INSTALLATION, CONNECTIONS, AND MAINTENANCE
• END-TO-END SIGNALING
• EXCLUS ION
• SPEAKERPHONE
(OPTIONAL}
Fig. 1 - 2568HP (MDI and 2568HU Telephone Set
1. GENERAL
1.01
The 2568-type telephone set (Fig. 1) is
intended solely for use with specially en-
gineered lines - not for general telephone use.
1.02
This section is reissued to:
• Add 425K network (2568HU)
• Include connections formerly found in
Section 529-225-468
• Revise Tables
• Revise set connection figures
Since this reissue covers a general revision, ar-
rows ordinarily used to indicate changes have
been omitted.
2. IDENTIFICATION
ORDERING GUIDE
Set, Telephone, 2568HP-* (MD)
Set, Telephone, 2568HU-*
(a) Replaceable Common Components
• Cord, Mounting D50N-*
• Key, 636D
• Lamp, 51A
• P-12A858 Blocking Ring (Shipped loose)
• P-21F159 Switch Assembly (Line)
• P-25E118 Switch Assembly (Exclusion)
• P-25E120 Button and Collar Assembly
• P-25E785 Card Retainer
• P-86D7* Faceplate
• P-90D052 Guard Assembly
• Set, Hand, G3Y-*
(b)
Replaceable Components [2568HP (MD)
only]
• Dial, 35C3B
• P-25E963 Relay Assembly (4-wire)
• P-88B9* Housing Assembly
• Ringer, HlA
(c) Replaceable Components (2568HU only)
• Dial, 35C3A
• P-88E5* Housing Assembly
• P-90D062 Printed Wiring Board Assembly
( 4-wire relay)
• P-90D064 Bracket, Arm, and Component
Assembly (includes NlA Ringer)
* Add appropriate color suffix from Table A.
©American Telephone and Telegraph Company, 1968
Printed in U.S.A.
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