Question about Gigaset C530 Hx

Can I connect the phone to the Sunrise Internet Box (Sagemcom CS 50001) and operate/query the phone book, missed calls and answering machine? I would like to have at least 2 such telephones, what I also need is a repeater (on the ground floor) to amplify the signal on the upper floor (as the Internet Box is on the lower floor), which model fits this? Or is there even a package (2 phones + repeater)?