To ensure the best possible connection with as many different deskphones as possible, DECT model headsets make use of an ABC switch.
This switch has three different settings (A, B and C) depending on which deskphone is being used in the configuration. To determine the best setting for any particular setup, users may either use the dial tone, or make a dummy call to a colleague or friend, and then manually shift the switch until they find the optimal setting.
To test the settings using the dial tone, follow these steps.
- Put on the headset.
- Press the link button on the headset to activate an active connection with the base station. The blue LED on the base station should be illuminated.
- Lift the handset, at which point the user should hear a dial tone.
- Try out each of the settings on the ABC switch to determine with which setting the user can hear a clear dial tone.
If attempting to determine the best setting by means of a dummy call, simply initiate a call after the dial tone can be heard. Using a dummy call instead of the dial tone allows the user to ensure that the settings are also optimal for the receiving side of the call.