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                          HOW DOES ZMODEM OPERATE?                        
                                                                          
                                                                          
                                                                          
     Zmodem operates from an external module.  Recently there are those   
     communication packages that have implemented it as an internal       
     protocol.  In doing so, they have sacrificed many of the options     
     that make it the fine protocol that it is.  The protocol known as    
     Zmodem, is actually one of many protocols that can be generated by   
     an external program, known as DSZ.  In addition to Zmodem, the DSZ   
     module is capable of generating xmodem, xmodem crc, y-modem, and     
     ymodem-g, to mention only a few.  In addition, it can use many of    
     these protocols in a batch mode, so that you do not need to enter    
     every file name that you wish to transfer.                           
                                                                          
                                                                          
  