NEC DT300 Series User Manual page 17

Feature Description
3. IM Not supported.
4. Presence
Not supported.
5. .Bluetooth Not supported.
(17) Speaker
Controls the built-in speaker which can be used for
Hands Free dialing/monitoring.
LED on key lights when key is active.
(18)Transfer
Allows the station user to transfer established calls
to another station, without attendant assistance.
(19)Hold
Press this key to place an internal or external call
on hold.
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