Table of Contents1. PRODUCT OVERVIEW.................................................................................... 71.1 PRODUCT DESCRIPTION ........................................................................................................................... 8Basic Features ............................................................................................................................................ 8Basic Description ........................................................................................................................................ 8System Block Diagram ............................................................................................................................... 91.2 2N® LIFTNET COMPONENTS AND ASSOCIATED PRODUCTS ................................................................. 12System Components ................................................................................................................................ 12Associated Products ................................................................................................................................. 141.3 UPGRADE AND INNOVATIONS ................................................................................................................. 151.4 TERMS AND SYMBOLS USED .................................................................................................................. 16Symbols in Manual ................................................................................................................................... 17Future functions ........................................................................................................................................ 172. DESCRIPTION AND INSTALLATION ................................................................ 192.1 PSTN CENTRAL UNIT ............................................................................................................................ 20Description ................................................................................................................................................. 20Before You Start........................................................................................................................................ 21CU Mounting .............................................................................................................................................. 22CU Connection .......................................................................................................................................... 22Interruption of Operation, Battery Maintenance ................................................................................... 262.2 LIFT CABIN AUDIO UNIT – UNIVERSAL ................................................................................................... 27Description ................................................................................................................................................. 27Before You Start........................................................................................................................................ 27Mounting..................................................................................................................................................... 28Electric Installation .................................................................................................................................... 302.3 LIFT CABIN AUDIO UNIT – COMPACT ..................................................................................................... 36Description ................................................................................................................................................. 36Before You Start........................................................................................................................................ 37Mounting..................................................................................................................................................... 39Mounting..................................................................................................................................................... 39Electric Installation (Earlier HW) ............................................................................................................. 40Electric Installation (Later HW) ............................................................................................................... 40CANCEL Input Connection (Door Contact, Optional).......................................................................... 44Mounting Completion ............................................................................................................................... 452.4 AUDIO UNIT – MACHINE ROOM .............................................................................................................. 47Description ................................................................................................................................................. 47