Design Features - Bell System Practices 851 Identification, Installation, Connections, And Maintenance

SECTION 503-60 1-1 01
Fig. 2-2851-Type Telephone Set
• Housing, 851A-*
• Handset, G15A-*
• Cord, Handset, H4DU-*
*Add color suffix from Table A.
(d)
Options:
• Exclusion
• Buzzer
• Station Busy
• Polarity Guard
• 4A Speakerphone
• Amplifier type handsets
Page 2
• Multiline Conferencing.
(e)
Replaceable Components:
• Dial, 8RA (rotary service)
• Dial, 35AF3A (TOUCH-TONE service)
• Ringer, P1B
• Key, 635A5
• Buzzer, KS-20419L1
• 812365039 (P-23F503) Key Collar
• Lamp, 51A (10V) for all key positions
• All items listed as modular.
TABLE A
COLOR ORDERING GUIDE
HOUSING, CORDS COORDINATED
AND HANDSET FACEPLATE
COLOR
SUFFIX
COLOR SUFFIX
Black -03
Charcoal
-70
Ivory
-50
Muted Ivory
-80
Green
-51 Light Green
-71
Red
-53
Muted Red
-69
Yellow -56 Light Yellow -72
White
-58
Light Gray -73
Light Beige -60
Muted Beige
-75
Aqua Blue
-62
Muted Blue
-76
2.06
Design Features:
• Sets are surface mounted on wall or vertical
surface using holes for standard outlet box
or keyhole slots.
• Handset is cradled on top, permitting on-hook
dialing when speakerphone is provided.
• All key buttons including hold can be
illuminated (lamps are furnished except in
Hold position).
• All pickup buttons convertible to signaling.