Nortel Meridian 1 Option 11C Planning And Installation Manual page 181

Installing power fail transfer units
Contents
General information
This section contains information on the following topics:
General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181
Installing the PFTU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182
PFTU control lead signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186
Procedure 23 on page 182 of this chapter describes how to install a QUA6
Power Fail Transfer Unit (PFTU).
PFTUs can be connected to the expansion cabinets as well as to the main
cabinet. Only one PFTU is supported per cabinet.
Note: The QUA6 Power Fail Transfer Unit operates with loop-start and
ground-start CO trunks. However, with ground-start trunks the
associated telephone set must be equipped with a ground-start button.
If Power Fail Backup is required as a fail safe for this system, use analog
trunks since digital trunks are not supported by a PFTU.
Option 11C Planning and Installation Guide
Page 181 of 408