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• Dial the number you’re calling
• After nishing the call, press the headset ON/OFF button to end the call if you have a
handset lifter or EHS cable. Otherwise, just hang up the phone manually
3.2 Receiving an incoming call in telephone mode
• If there is an incoming call and the headset base is connected to a handset lifter or
electronic hookswitch device, the TEL light and headset light will ash, and a ring
tone will be heard on the headset
• Press the headset’s ON/OFF button. The base’s Online Indicator LED will light
• If a handset lifter or electronic hookswitch device is connected to the headset base,
the line will be engaged automatically. Otherwise, you will need to lift the handset of
your telephone or activate the headset button on your telephone
• To end the call, replace the headset on the base or press the ON/OFF button. If you do
not have an EHS cable or a handset lifter, you will need to manually disconnect the line
3.3 Making an outgoing call in USB/PC mode
• Ensure that the PC button on the top of the headset base is selected
• Press the headset’s ON/OFF button and the base’s Online Indicator will light
• After nishing your call, press the ON/OFF button to disconnect. The base’s
Online Indicator will turn o
• You may also need to click your softphone’s disconnect button to end the call
3.4 Making a call using UniBase® Mode
Your Leitner LH280 is equipped with UniBase technology that allows you to conference your
oce phone and softphone calls together. To activate UniBase mode, start with the base in
phone mode with a call on the phone line. Press and hold the PC button for 4 seconds. Both
phone and computer mode lights will light up. You can now conference a softphone call with
the existing telephone call. To exit UniBase mode, press the phone mode button.
Note: all computer sounds will be shared with the conference call.