Philips SPENDEX 40 Maintenance Manual page 30

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NATO CONFIDENTIAL
S P E N D E X 4 0 U A 8 2 5 1 / 0 0 A N D / O l L I M I T E D M A I N T E N A N C E M A N U A L
controller can energise the relay by activating the signal 2W/4WN.
4 . 1 3 . 9 O n - h o o k r e l a y
The on-hook relay RE1 is energised, when the equipment is in the
on-hook state and during transmission of the dialling pulses in the
off-hook state.
m 4 . 1 3 . 1 0 D i a l l i n g p u l s e r e l a y
The relays RE2 and RE3 are the dialling pulse relays. In 2-wire
connection the dialling pulses are put on the line via relay RE2 and
in 4-wire connection via relay RE3.
9 9 2 2 1 5 4 1 3 4 3 1 4 - 1 6
NATO CONFIDENTIAL