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D
CD
.,
LEAD
DESIG
LK
LT2
MG
MS
PA
RC
RH
RSl
RS2
ss
TC
TD
TABLE Y (Cont)
LEAD TAB LE-INTERCOM CI RCUIT
FUNCTION
Dial tone disconnect - ground is applied to this lead by the selector after first digit of an
intercom code is dialed to stop dial tone.
Transfer digit 2 - provides ground from DSS console to operate TR, TRl relays (codes 10-19).
Motor ground - ground to start interrupter motor when any intercom path is seized.
Motor start - from interrupter motor circuit, starts interrupter from MG when any path is
seized.
Paging signal - output to the paging amplifier ( 457C KTU).
Paging (optional) speakers must be
connected as shown in Fig. 43.
Calling ring - common ring of intercom circuits to voice and tone-alerting circuit and to
TOUCH-TONE adapter.
R relay hold - ground from LK lead is applied on this lead to 424B/424C KTU to prevent
ringing until all dialing is completed.
Reset - provides ground for 424B/424C KTU selector timer over RS2 lead.
If TOUCH-TONE is
provided, N option furnishes ground to the counting relays via the adapter.
Reset - connected to RSl (see above).
Station signaling input - when dialing is complete, this lead carries the tone burst to the selector
where it is applied to the VS lead of the station selected.
Calling tip - common tip of intercom paths to voice and tone-alerting circuit and TOUCH-TONE
adapter.
Transfer digit - resets 424B/424C selector after 1st digit of a 2-digit code is dialed.
KTU/CONNECTOR
PIN NUMBER
Jl0-30
Jl2-30
J14-26
J9-39
Jl l-6
Jl l-5
J16-0
J12-13
J14-13
J16-9
Jl0-26
J12-26
Jl0-38
J14-38
J9-19
Jl0-14
J16-1
J12-12
J14-12
J16-8
J9-16
J9-28
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