2 Call control

Call control is the ability to control the flow of voice and video calls, directly from your Jabra digital headset and speakerphones.

A user can initiate and end calls, put calls on hold, adjust volume up/down, or mute the call from the device itself, without the need for a keyboard or mouse to interact with virtual buttons on a computer screen.

Providing the controls on the physical device gives the end-user an intimate level of control, making a daily routine filled with calls potentially easier and faster to handle.

The following are the basic call control functions available:

Device functionality Purpose
Answer/start call To answer an incoming call or start a new call.
End call To end the current active call.
Volume up/down Adjust the sound volume during an active call.
Mute/unmute Mute or unmute the microphone in an active call.
Hold and resume call Place the current active call on hold (waiting), allowing it to be transferred, or allowing a temporary call to be made before resuming the original call.
Reject call Decline an incoming call.

You can activate call control functions on Jabra devices by interacting with buttons or by tapping:

  • The device itself
  • A controller attached to the USB cable
  • A base station (for some wireless devices)

Depending on your Jabra device, you can also activate the Mute functionality by lifting the boom arm to a vertical position, while on others you can answer a call by removing the headset from the base station.

Consequently, and as an example, the device may send an off-hook signal as a result of one of several different actions. This means that an off-hook signal represents a user intent, rather than a specific device interaction such as a physical button press.

It is recommended that softphone applications do not attempt to control the volume using the Jabra library; instead, if you would like to implement volume control in your app, the softphone application should interact with the operating system APIs.

Volume buttons are not call control exclusive, as they also work during non-call use of the devices, for example, when listening to music or watching an online presentation. Due to this, the device sends volume up/down signals even when the device is on-hook.