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Page 150 of 436
Figure 61
MDF terminations for typical PFTU operation
PFTU
P1
P2
Auxiliary
power supply
-48V
GRD
NN43021-310
Standard 06.01
Installing Power Failure Transfer Units
5
Designated telephones (DTMF or rotary dial types)
6
Central office trunks
PFTU
terminations
Figure 62 on
page 151
PFTU can be activated by system power failure and using the Attendant
console TC switch. If more than one Attendant console is connected to the
system, it must be connected in parallel with the main Attendant console as
shown in the figure.
March 2013
Telephone/CO trunk
terminations
System alarm (J3)
terminations
shows detail view of the PFTU alarm connections. The
IPE
terminations
System monitor
normally
open
X
7 8
9
GRD
553-5137
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