Old TV remote vans, new hf kit

I have a couple of old tv remote vans coming in to have the communications equipment upgraded. The problem is that they currently have old analog phones with a date adapter to tramsmit fax when landlines are unavailable. They want to put in new CDMA equipment to duplicate this function, however, I have been unable to locate anyway to facilitate this function with the nokia CK7w kit we sell. Has anyone else out there run into anything similar, and what,other than telling the customer that it is not possible, was done to make it happen


Thanx