ICX-35-700 ICX (International), issued March/1998 19Chapter 3. System FeaturesSystem Features are either available on a system-wide basis or aid in the overall administration of theSystem.This chapter contains detailed descriptions of the following System Features:Topic PageAEC Disconnect 22Attendant Groups 22Automatic Call Distributor 23Automatic Route Selection 24Automatic Trunk to Trunk Transfer 24Background Music/MOH Separation 25Battery Backup 25Building Block Expansion Capability 25Built-In Voice Mail 26Call Progress Tones 27Caller ID 27Caller ID Alpha Tagging (Not Available in USA) 28Centrex/PBX Compatibility 28Class of Service 29Class of Service - Trunk/Tie 29Class of Service - Ext/Ext Restriction 30Class of Service - Extension Feature 30Class of Service - Trunk to Trunk Restriction 32Class of Service - Extension (Station) Timers 32Computer Telephony Integration Capability (USA Only) 33Data Security 33Day/Night System Mode 33Manual Day/Night Mode 34Automatic Day/Night Mode 37Digital Pad 37Direct Inward System Access 38Distinctive Ringing 39Doorphone 39Doorphone Sensor 40Extension Interface 40Digital Key Telephones 40Analog Device Capability 41
