SINUMERIK SYSTEM 3 DNC

[nas]

Hi to all,
This is going to be my first ever post on the net
We would like to upgrade an old (1983) cnc milling machine (SINUMERIK SYSTEM 3 CONTROL) with a DNC set up for CAD/CAM uses.
I would like to know:
1) What module to add to the system (DNC) including the wiring
2) The RS232 wiring
3) Data transfer settings for PC and NC
I would appreciate any help/comments in here.
Regards,
Nas

[Muh]

as far as i know, this is not possible to build a automatic communicating board for System 3 as there is no stop command in this system
But I'm looking for a solution. please share if you find it.
actually i don't like to change my Original SHW CNC system with all of its great interlocks with an unknown simple modern system!!