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Drop buttonConference buttonMessage lightFor disconnecting from a call or dropping the last partyadded to a conference call.For setting up conference calls.For indicating when a message has been left for you (steadygreen light).The following optional modules are compatible with the <strong>7406</strong>BIS voice terminal:500A Headset Adapter7400B Data ModuleC401A or C401B CallCoverage ModuleD401A <strong>Digital</strong> DisplayModuleProvides a dual-purpose switch that turns on the adapterconnecting the headset to the voice terminal. Pressing theON switch is equivalent to going off-hook with the handset,and pressing the OFF switch is equivalent to going on-hookwith the handset.Provides data capability to the attached DCP voice terminal.It also provides integrated simultaneous voice datacommunications over standard twisted-pair wiring.Provides 20 call appearance/feature buttons to supplementthose on the associated voice terminal. For more informationabout using the features assigned to this module, see theappropriate feature procedures that follow.Provides visual indication of call-related information, timeand date, elapsed time on calls, messages, and abbreviateddialing numbers.
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