YMODEM-g

from The Free On-line Dictionary of Computing (8 July 2008)

YMODEM-G

   A non-stop "streaming" version of {YMODEM} designed for
   "error-free" connections with proper flow control; the
   transmitting program sends packets to the receiver as fast as
   it can without waiting for acknowledgements.  Any errors cause
   the entire file transfer to abort.