Questions teaching unit RS232-interface

1. What is the name of the protocol that take care of the dialogue between PC and modem
2. What kind of interface is the RS232-interface
3. How can a RS232-interface connector be recognized.
4. What are the functions of the pin numbers 1 to 8 and 20.
5. Which pin's are outputs and which are inputs.
6. What is the responded signal of the RTS and who gives that.
7. Which (two) signals are the start of the "handshake" procedure and in which order takes that place.
8. How many RS232 circuits are working during a data transfer and which are they
9. When a computer only receive data which signal are working.
10. When a computer only send data which circuit are working.
11. At which signal of the p.c. will the modem response with the carrier wave.