Yealink handsets

Press the Menu soft key, select Features > Call Waiting select Call Waiting then press Switch to enable/disable the setting, then click save.

 

Cisco handsets

Press the Menu button then select Preferences, choose Call Waiting  and press the edit soft key, select  soft key, select y/n depending on whether you want to enable or disable call waiting. You can also dial *56 to activate or *57 to deactivate call waiting.

 

Gigaset cordless

On the handset, push the right hand side of the central four sided button. From the available options choose Select Services then select Call Waiting, either enable/disable this then select Save.


MyNetFone softphone

The MyNetFone softphone does not have a call waiting setting, if you only want to answer the current call you’re on you can simply reject any new incoming calls.