Don't think the SDK will support multi connections
I have finally got responses from the Phone (Diallling, ringing etc)
and will try to figure which of the many AT Commands did the trick then I can go back to MSComm which will support multiple connections.
The NOKIA AT manuals are rather unfriendly ! Are there any more descriptive manuals available i.e. a good verbal explanation of what the command does rather than the 'generic' approach that appears in the 2 main manuals