15) Volume control
button
16) Display control
buttons
17) Microphone
18) Handset jack
19) Call
appearances/feature
buttons
For adjusting the volume of the speaker or the built-in
speakerphone when you are on a call, or for adjusting the
volume for the tone ringer when you are not using the
speakerphone.
Each of these 7 buttons accesses display features and is
labeled with a feature name.
For Speakerphone operation. Used when the Speakerphone
option is set and Speaker button is depressed.
For connecting the handset cord to the telephone. Located on
the back of your telephone, labeled .
At least 3 of these 12 buttons are devoted to incoming and
outgoing calls (call appearances) and are labeled with an
extension number; the remainder access features (feature
buttons)
and are labeled with a feature name.
The following optional modules are compatible with the 7406 Plus telephone:
500A Headset Adapter
Provides a dual-purpose switch that turns on the adapter
connecting the headset to the telephone. Pressing the ON
switch is equivalent to going off-hook with the handset, and
pressing the OFF switch is equivalent to going on-hook with
the handset. Plugs into the speakerphone/headset adapter
jack.
7400B Data Module
Provides data capability to the attached DCP telephone. It
also provides integrated simultaneous voice data
communications over standard twisted-pair wiring. Plugs
into the line jack.
S101A and S201A
Provides total telephone operation without using the handset.
Speakerphone
Turning on the speakerphone is equivalent to going off-hook
when placing or answering a call and turning off the
speakerphone is equivalent to going on-hook. A mute switch
is provided to temporarily cut off transmission to the distant
caller. Plugs into the speakerphone/headset adapter jack.
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