Actually I know little definition of Xon/Xoff but I want to know following things, which are not quit clear.

1, What characters are used for Xon or Xoff, especially in Windows hyperterminal program.

2, What if some one sends a data which contain characters similar to Xon or Xoff.

3, How much efficient it is, and how much error imunity it has.

4, Is Xon/Xoff is sent every byte or every chunks.

5, Any other useful detail/Links about it.

Thankyou