TAPI Terminal component and add some extra features using the TAPI configuration dialogs. The read and write parts of the terminal are seperate threads, this suited me, but if you require sync ed comms then you will need to change that to one

The archive (tapid30.zip) includes a sample application which dials a user-defined number on the first TAPI device on the system (with the designated device ID 0). This is a real quick and dirty sample.