Help on Downloading The 'Download' command allows a caller to receive a file from the host. The caller must select the protocol after giving the download command to HOST2, and then must tell HOST2 what files to send. Some protocols like ZModem will start automatically after this. Others, like XModem, require the caller to start a download in their comm program at this point (usually Pg-Dn) and will be asked by the comm program for a file name again. The transfer is then initiated.