Used to adjust speaker/receiver volume, and
• Speaker/Receiver Volume:
Press ( ) or ( ) key during conversation.
• Ringer Volume:
Press ( ) or ( ) key during ringing.
Press key to activate speed calling - system
Controls the built-in speaker which can be used for
Hands Free dialing/monitoring.LED on key lights
when key is active.
DT310 supports half duplex handsfree. DT330
supports half/full duplex handsfree.
Allows the station user to transfer established calls
to another station, without attendant assistance.
Press this key to place an internal or external call