NEC ELECTRA ELITE IPK II - Power Failure Transfer

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5 - 8 Installing KSUs
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Document Revision 3 Electra Elite IPK II
2.5 Power Failure Transfer
The Power Failure Transfer relay is located in the KSU. When selecting a
Single Line Telephone for power failure transfer, make sure it matches the CO
line dialing type (10 pps, 20 pps, or DTMF) where it is connected. A Single
Line Telephone with a ground button must be used with Ground Start Trunks.
Figure 5-2 Power Failure Transfer Connections is a relay diagram. The relay is
shown with the power ON.
 There are three PFT Circuits for each B64-U( ) KTU.
Figure 5-2 Power Failure Transfer Connections
M
D
F
M
D
F
C
O
I
S
L
I
Relay 1
Tip
Ring
Tip
Ring
T
E
L
C
O
SLT