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RTS/CTS and modem handshakes?

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The Question is:

 
Hi Wizard,
 
how can I realize the harware-handshake (RTS/CTS) for my modem in
programming language C?

The Answer is :

 
  That depends highly on the serial line port and the modem -- on
  the OpenVMS host end, this will will likely involve options on the
  serial line sys$qio or sys$qiow call, and also involve some reading
  in the OpenVMS I/O User's Reference Manual.  (This, of course, also
  assumes that the modem and the host serial port are both capable of
  RTS/CTS handshakes -- most OpenVMS systems prefer to use XON/XOFF
  flow control, and various of the available serial line interfaces
  do not provide RTS/CTS handshakes.)
 

  
     
     answer written or last revised on ( 26-AUG-1999 )
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