The DEBUG i5/OS® FTP client subcommand changes the client timeout limits when the default timeout values are not long enough for a data transfer to be completed successfully. You only need to change these values in situations where network traffic or other conditions cause transfer times to become quite large.
DEBug T1 | T2 [ value ]
For example:
DEBUG T1 900
This value sets the client time-out value for server replies to 900 seconds.