need the ability to acces Nokia keypad phones (DCT-4 type) using its dataport.
implementation should be based on the FBUS DCT-4 protocol.
delivery should be in the form of simple API which include
1. open port
2. press key / release key
3. close port
all keys should be supported (0-9,#,*,menu, arrows, soft, volume, power)
source code is required