Hello, I need to setup sme cordless VOIP phone with 3CX, i need the call transfer feature, does someone know if it works with those phones? I read that it works with C470, but it is out-of-production unfortunately. With A580 i read that you can trasfer by going to the menu, then choosing an option (in italian colled "consultazione"), then ok, then digit the extension to forward the call (ex:13) and ok again. This way you put the caller on wait and can talk with 13. If you press R now, you go out of the call and the caller talks directly with 13. Does this procedure work? (note: you also need the corect settings, look here: http://www.dbainformatica.net/public/file/Soluzione A580 con centralino 3CX.pdf (it's in italian). I found nothing about c590 except that it should be the model following c470, so if c470 worked it should too???