Copy adressbook of mobile into DECT phone

We have a lot of people with a well filled address book in their mobile phones (name + telnr that is). To transfer those adresses to their fixed/landline phone (usually a DECT) is only possible via quite a few steps and connections which are too difficult for most (elderly) people. So they end up doing it manually, if at all. I want an (preferably internet based) application that "reads" the address book of the gsm and then sends that to the DECT phone. Don't expect the users to have a lot of knowledge, nor do they have a lot of mobiles connected to their pc. So in an ideal world the workflow would be as simple as: - Dial this number with your monile phone.... - The system then reads and copies the address book - Type in the number of your land line - The system then calls the landline and dumps the adresse in the memory. I know, quite a challenge, especially with all the different mobiles and landline phones available. Can this be done?