Communication Server Large System Installation and Commissioning

Page 150 of 456 Installing Power Failure Transfer Units
NN43021-310 Standard 02.01 December 2007
2 For each trunk assigned to the PFTU.
• Connect the tip and ring of the CO card to the third pair of the
assigned PFTU.
• Connect the tip and ring of the trunk to the fourth pair of the assigned
PFTU.
End of Procedure
Installing QUA6 PFTUs
QUA6 PFTUs are used for Large System installations. The QUA6 PFTU is
powered from an auxiliary –48 V DC fused output from the external power
equipment.
Figure 60 on page 146 shows a high-level view of QUA6 PFTU alarm
connections. For PFTU operation, the wiring from the following equipment
cross-connects through termination areas at the MDF:
1 PFTU
2 Auxiliary –48 V DC
3 System monitor
4 Attendant console (optional)
5 Designated telephones
6 Central Office trunks