Asterisk with OpenPhones

i have a little question. At the moment we use at home a telephone system from OpenCom with OpenPhones, and we want to use these Phones with a Asterisk system.

Is this possible? Our Phones also get the current over the phonewire, is this possible to realise this with asterisk?

Some of those (maybe all?) appear to be Aastra phones. Are they running a standard SIP load? If not, can they?

Asterisk doesn’t provide power over the ethernet lines to drive the phones, that’s the function of a PoE switch or injector.