Yeastar S100 and Grandstream IP Phones BLF Keys

Hi, how can i program a blf key in grandstream to pickup directly when is blinking, right now i can see it green or red when in use or not, but when click on it, it will call the extension rather than picking up, on yeastar phones i have seen that is possible because you have a value field and a feature field but grandstream only have a value field so if i put the extension number ill see the blinking not how to be avaible to pickup?


Thanks in advance


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