The pickup functionality on the Snom headset is working only with Snom phones, it's using the EHS cabling to connect with the phone and it will unfortunately not work with a softphone since it's connected via USB.
Have a nice day
Thanks for your anwser. It's possible to "disable" the button for transform A170 to a loud speaker and reduce manipulation for user ?
I do not understand your request actually, it's a physical button and there is no way to physically disable it, but if the headset is just connected with a softphone, pressing the button shouldn't do anything anyway.
Also, I do not really get how you would like to transform the A170 into a loudspeaker? Why not using the laptop/PC/Smartphone built in speaker instead?
For the moment, le button cut the sound. And at start, the morning, the headset is "sound off", I must push the button one time a the start of the day (and every time I reconnect it on its base.
I don't think there is much we can do actually, the button is thought to be used with a phone and the headset too, when you first connect it (so every morning after booting up the PC) you will need to press the button for it to completely connect.