
Page 146 of 456 Installing Power Failure Transfer Units
NN43021-310 Standard 02.01 December 2007
5 Designated telephones (DTMF or rotary dial types)
6 Central office trunks
Figure 60
MDF terminations for typical PFTU operation
Figure 61 on page 147 shows detail view of the PFTU alarm connections. The
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.
PFTU
Auxiliary
power supply
PFTU
terminations
Telephone/CO trunk
terminations
IPE
terminations
System alarm (J3)
terminations
System monitor
78 9
GRD
X
normally
open
-48V
GRD
P1
P2
cross-connects
553-5137
Comentarios a estos manuales