hm, thats not what i expected, but yeah as it look its not possilbe. woudl have been cool to have a old phone with ringdial and have full SIP compatibility.
Thanks for the help anyways
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Well, well, well look what we have here.......
Thank you @WereCatf
I am trying to make a flexible digital led display, and I found one NEW LED "APA107 LED", so how can i make the display? and what kinds of controller/decoder i need?
datasheet for the APA107 LED, http://www.newstarleds.com/product/20170406144622929.pdf