Create contacts programaticaly with photo

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Howdy,

I'd like to create contacts on the phone programatically, and remotely so that i can put contacts associated with a picture, so it appears on the phone.
I'll do it from an asterisk box with linux, aswell from windows clients.

How would the yealink phones allow me to create contacts, sending the photo of it?
example:

2349995541 => photo
2349995540 => photo

So that I can have the contact photo/image when they call.
Thanks in advanced,