Bell System Practices Plant Series Reference page 4

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OESIG.
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3
DIAL TERM.
LIGHT
MTG BLOCK
Fig. 3---: 1 7028 Telephone Set (Current Pr oduction) Using 25P4 Dial and 40100 Network
0
d o Jan 3 ,
G3AR
40100
HANDSET
NETWORK
IRI
(W-BL)
IGI
(BK)
TRMTR
IWI
(BK)
(BLl
be
(0-BK)
NOTES
I
SET WIRED FOR RING PARTY SERVICE,
SEE TABLE A FOR OTHER CLASSES OF SERVICE
2. LINE SWITCH OFF-HOOK SEQUENCE
de
*
INSULATED AND STORED
25P4 DIAL
ob
CLOSES OPENS
fq
CLOSES OPENS
0
0
0