Communication Server Large System Installation and Commissioning

Page 145 of 456
Communication Server 1000M and Meridian 1 Large System Installation and Commissioning
150
Installing Power Failure Transfer Units
Contents
This section contains information on the following topics:
PFTU configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
Installing a PFTU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
Connecting trunks and telephones. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
Installing QUA6 PFTUs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150
PFTU configurations
In AC-powered systems, Power Fail Transfer Units (PFTU) are powered by
the A0367916 Auxiliary –48 V Power Supply (up to six PFTUs can be
supported by one power supply). In DC-powered systems, PFTUs are
powered from an auxiliary –48 V DC fused output from the external power
equipment.
Figure 60 shows a high-level view of PFTU alarm connections. For PFTU
operation, the wiring from the following equipment cross-connects through
termination areas at the MDF:
1 PFTU
2 Auxiliary power supply
3 System monitor
4 Attendant console (optional)