Instruction manual

Contents
Adjuncts continued
■ Telephone Adjuncts 3–37
Modems 3–37
Headsets 3–38
Headpieces 3–38
Manual Operation (Analog Multiline Telephones Only) 3–38
One-Touch Operation (MLX and Analog Multiline
Telephones) 3–38
Specialty Handsets 3–38
Message-Waiting Indicator 3–39
Additional Telephone Adjuncts 3–39
■ Data Communications Adjuncts 3–39
ExpressRoute 1000 ISDN Terminal Adapter 3–40
■ Summary 3–40
Power-Related Hardware 3–43
■ Power Accessories 3–43
System Auxiliary Power 3–43
Battery Backup Power 3–44
Telephone Power Units 3–44
■ Protection Accessories 3–44
In-Range Out-of-Building Protection 3–44
Off-Premises Range Extender 3–45
146A and 147A Surge Protectors 3–45
Electromagnetic Interference Filters 3–45
■ System Alarms 3–45
Trouble Alarm 3–45
Power Failure Alarm 3–45
Power Failure DID Busy-Out 3–46
■ Power-Failure Transfer Telephone 3–46
System Components
3–iii