Connection of Switch 2 ................................................................................................... 322.4 Camera Installation ...................................................................................................... 332.5 Extending Module Connection .................................................................................... 34Module Cable Interconnection........................................................................................ 34Maximum Count of Extenders ........................................................................................ 35Button Numbering .......................................................................................................... 362.6 Buttons Labels – Insertion, Replacement .................................................................. 37Instructions ..................................................................................................................... 37Label Material and Printing ............................................................................................. 382.7 Mounting - Completion ................................................................................................ 39Most Frequent Mounting Errors...................................................................................... 393. 2N® Helios Configuration ................................................ 413.1 Programming ................................................................................................................ 42Entering Programming Mode ......................................................................................... 42Programming Procedure ................................................................................................ 42Programming Error ......................................................................................................... 43Deleting All Passwords, All Memories, Complete Initialisation ...................................... 44If You Forget the Service Password ............................................................................... 443.2 Full Parameter Chart .................................................................................................... 45Explanation of Some Parameters................................................................................... 494. Function and Use ............................................................. 514.1 Function Description ................................................................................................... 52From External User's View (Visitor) ............................................................................... 52Function Description – Numerical Keypad Models ........................................................ 52From Internal User's View (Survey of Functions) ........................................................... 53Signals Overview ............................................................................................................ 54Call Termination Options - Summary ............................................................................. 55Code Lock ...................................................................................................................... 55Traditional Button Telephone ......................................................................................... 56DTMF Transmission during Outgoing Call ..................................................................... 56Buttons Substitution ....................................................................................................... 56Keypad Operation Instructions - Summary .................................................................... 57Frequently Asked Questions About Keypad Function.................................................... 582N® Helios Statuses and Available Operations ............................................................. 594.2 Section for Advanced Users ....................................................................................... 60Automatic Multiple Number Dialling ............................................................................... 60Survey of Messages ....................................................................................................... 63Arrival/Departure, Day/Night Modes............................................................................... 644.3 Maintenance .................................................................................................................. 65Cleaning ......................................................................................................................... 65Label Replacement, Programming Status Changes ...................................................... 65