Once several users have been registered, this function can be used to switch to another user as the active user.
The Switch fkey parameters need to be exactly configured as the registration. When pressed, the fkey parameters are compared against reg-config. E.g. If no number configured on registration, you MUST NOT configure the number field on the fkey config. Otherwise the phone does not identify the registration which is to be activated.
Tip: If the new registration has become active after use, the function key assignment of the new registration also applies. It therefore makes sense to configure a deregistration on this key in the user's configuration.